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  1. Last week
  2. Mike.K

    Wanted. Good 61/10cc two stoke nitro engine.

    Ok. No problem. A nice un-used and seemingly never run vintage Irvine "Red Top" 0.72 sourced by the ever enthusiastic and helpful Rob Newman at Avicraft. Rob tells me it was a spare engine kept back from his days with the Panic Team. This motor has the Irvine 0.61 crankcase with a larger displacement cylinder liner and perhaps is also stroked at the con rod and crank. Rob supplied it to me at a reasonable price complete with what I believe to be a "quiet" silencer. I`m well pleased with the buy and thank Rob for his efforts in finding me a very nice engine. Now fitted to a scratch built Ultra Stick 60" fuselage with a 12oz tank in the hope it may be a suitable air-frame with which to take A and B tests this year. It currently shares the same wing from my electric version but when the slow banana boat arrives in Hamburg from Vietnam, Horizon have promised me the first available spare wing that arrives in their German warehouse. Availability is expected from mid-March 2019. Mike
  3. Mike.K

    Midwest Extra 300S 80" kit & build

    It has been month since I last posted on the progress of the Extra. It made its first public appearance at the AGM. I`m grateful to James for his complementary comments. Also to Sam and his father for the kindly phrased and very helpful comments and suggestions. This is the first time I`ve built such a large and heavy model so in this respect I`ve been breaking into new and unknown territory. The learning cure has been steep and the construction and fitting out of this model...well lets say eyewateringly expensive and at least double the cost of a typical 60" model. Some £800 seams like a good but may be conservative guestimate! I`ve tried not to count the cost but my pocket now seems somewhat empty!! At least me trousers are not so prone to falling down unexpectedly.... So where am I now with this over-sized project? Apart from checking CoG, the model is now ready for sound level checks. I`m assuming I`ll not be breaking any of our rules by doing so at Fickleshole? Please advise me if this is not the case. The Extra has been on a weight building spree with nothing more now to add. The Just Engines muffler system has been delivered and fitted. Perhaps a tad too long, side to side, but with a bit of cowl nibbling, the system fitted in a treat. My spec to JE was to build the quietest muffler system for a DLE 40 twin that they had ever made. It is their best shot at helping this model achieve the mandatory 82dB or less. It perhaps accounts for some of the weight at around a half pound. The model now tips the scales at the top specified weight stated by Midwest at 17.1Lb/7.78Kg. Where does all this weight come from in the last few hours of construction?! It just piles on!! This puts paid for ever any slim possibility that this model would ever be able to fly out of Fickleshole. So be it. Other arrangements are being made and I hope to be able to advise about that when and if I receive appropriate notification. Images here show the new JE muffler system supplied with over-length pipes to enable me to cut them to a precise length once the muffler can was fitted to the front bulk head. The long length of the exhaust after the muffler can be further truncated as required but at the moment acts as a useful carrying handle.... One thing is for sure. These old vintage kits are very much heavier that the latest manufacturers offerings. Updated constructional methods and laser cutting enable a bulk of excess material to easily be removed at the factory. Die stamping or scratch build DIY projects don`t seem to have such an advantage. Times and design technology move on with the years. I know Sam and his father were clearly quite shocked at the mass of this model. Typical of the era in which it was produced seemed to be the prognosis. Not much more I can say presently. Only the up and coming noise testing will now decide if this monster will ever be able to become a flyer. The idea is not an impossibility. Many other Midwest Extra examples of similar weight can be seen flying successfully on You Tube videos. Most of the footage would appear to come from the States. A natural back ground for a model of this parentage. As always guys, comments and observations gratefully received. Mike
  4. Earlier
  5. Roger. Totally delighted to hear from you. I had hoped we might hook up some time. (Late edit) Contact now established between us. Most useful. In short, I think your involvement and that of Rob Lewis saved the day as for as the Dr1 is concerned. It was obvious the incidence of the top wing was incorrect and you both came up with a solution which might otherwise have eluded us for many a long month. George has also seen this thread which he read with interest. A link to it was also sent to DW for their information and perusal. It must of hit the spot down there in China, because they immediately mailed and thanked me for the thread and requested I review their next production offering! I much enjoyed building the Dr1l but as said above, there were several issues needing important attention. The C of G issue was a glaring error. We all saw that immediately and corrected that in an instant. The tail-plane and rudder were other obvious areas for major attention. DW in my opinion failed to understand that the tail structure, together with the torsionally weak rear fuselage needs some slight increase in cross sectional area and a revision to structure based on the I-beam principle. I see revisions as very necessary to impart a reasonable degree of structural stiffness. That Rob and I both added tail braces was proof enough that there is a substantial defect in design as regards the tail-plane. Rob Lewis and I are currently both involved with trial building the latest DW offering...their Fiesler Storch which frustratingly also has the same type of rigidity issues. I`m a bit ahead on that build so have been able to ping Rob some images which I hope will assist him. Kits were sent to us both about three weeks ago for evaluation. I`ve had to address tail weakness on that model also. I have increased tail plane depth by 2mm by cross grain sheeting the basic DW structure to impart some torsional stiffness and strength. Indeed the leading edge of the elevators snapped on me as I lifted it off the building board...... One appreciates that the tail end of almost any model must be kept as light as possible, but DW in my opinion fail do not understand that this must not be at the expense of lack of intrinsic air frame strength or structural integrity. In the case of the Storch then, I have agreed to compile a report on my build findings once the model is finished. Presently, it is about 70% done and should be complete in about ten days. George has been kept in the loop as regards the build of the Storch and has seen images of the areas which concern me on that model. Having been involved with two DW offerings now, my personal opinion is that the design and kits are under-developed in several areas. This is a shame because the core product and concepts deserve to be winners. I`ve also built both the Taiwanese SFM SE5a and their Fokker DV11 which build perfectly and fly even better. If the offerings from DW and SFM were placed side by side for comparison, then DW would struggle badly in the contest and SFM would romp home as winners leaving DW to trail in the dust. If DW could only come to understand what modellers require and indeed demand, then they might then become competitive. I`d like DW to make better kits. Whether that will ever happen is debatable. They will have to run hard to catch up with SFM. The incidence issue was irksome and very concerning until you came up with the solution after which George pinged me a "heads up". We immediately spoke together about the problem. At the same time, I saw Rob Lewis`s RC Model Geeks videos and made contact with him. I was further able to brainstorm the problem. Thereafter, further words with George allowed him to see that there were issues with the development of the Dr1 kit and he took the matter up with DW direct. The problem is that the DW sales guy speaks English but the CAD man doesn`t! Thereby perhaps lays the nub of the matter. Details get lost and dumbed down in translation. "Chinglish" is not the ideal lingo with which to discuss aerodynamic subtleties!! Having seen Robs videos of his DR1 in action, I have to admit to being rather shocked by what transpired. Rob had a most difficult maiden flight with the DR1 which left him clearly shaken and verbally dumb-struck. The model did not fly well initially but Rob later did a little more work to help some of the problem areas. Then winter set in and the 2018 flying drew to a close. This coincided with the conclusion of my own model build with my model being moth-balled for the winter pending better flying conditions. I don`t think Rob has latterly flown his example since his final 2018 flying session concluded. So it sounds to me as if we all have dormant Dr 1 models awaiting the 2019 flying season. Frankly, with more that three hundred hours invested in the building of my example, I`m almost terrified to have it flown! Lets hope it doesn`t end up as my five year old Grand-daughter once described it as potentially "A very expensive but exquisite little ornament"! Good to chat on the phone this morning, Roger. All the best. Mike K
  6. Hi Mike, I have registered to make a comment on the above. I am actually the (rather antiquated) aerodynamicist that George mentions and possibly on of the first to build the triplane from his kit.. I have to say that I found the kit excellent although there were one or two niggles. I found Bob Lewis' videos on the build extremely useful and incorporated some of his suggestions. Bob raised the CG problem that I passed on to George As far as the wing incidence was concerned I had slight difficulty in persuading George that ther was a problem. Two quick sketches prove that there is no way that the wings can be set up correctly with front and back struts of equal length. Dancing wings have acknowledged that the CG position was wrong on the instruction sheet but have still to give a satisfactory answer to the strut length. Like you I sawed a bit off one strut, rebent it and drilled a hole. Mine was 15 mm compared top your 14mm. I was interested to see your enlarges rudder and will be keen to hear if it does the trick. (My flying days are over so I am waiting for a test pilot for my Fokker. Meanwhile I have been scribbling a Sopwith Pup to the same scale using many of the construction techniques on the triplaneSopwith camel.pdfSopwith camel.pdf
  7. Pilot Ben

    18 cylinder radial!

    Listen to that! The only slight drawback is that, at 22kg, it is just over 3 times the weight limit for a model at our field I couldn't find a specific price, but my estimate would probably be well north of £10,000, considering that a 7 cylinder OS radial sells for just under £5,000.
  8. For Sale: Sebart Sukhoi 29S 30E - Assembly Complete - Unflown With:- Hacker A30-10 Motor Hacker X55 ESC 4 x HS-65 Servos 2 x EON28 2550Mah Lipo Spectrum AR600 receiver All for £100.00 - Buyer collects. I never did catch the electric bug!! - Need space for new (IC) models. Best Regards, =Adrian=
  9. Does anyone have a new or good used .61 two stoke glow motor they wish to dispose of at a reasonable price? I`m in the market for one to go on another 60" Ultra Stick. Perhaps give me a call if you have anything suitable please. 01883625406 Thanks, Mike Kennedy
  10. Mike.K

    Midwest Extra 300S 80" kit & build

    Here is the CAP658 CAA guidance document to which James referred. It makes interesting reading...perhaps to be absorbed in slow time. It is a fair sized document to be digested. CAP658 And this as a PDF link CAP 658 Model aircraft safety guidance Mike
  11. funflyjames

    Midwest Extra 300S 80" kit & build

    That regulation refers to any model that is capable of having a fail safe set and it really comes down to the user (ie us) to know the laws and regulations that we are required to fly to. All the information is available from the BMFA, either in the handbook or the CAP 658 publication. As recent events have showed, we must all be seen to be flying to the law and regulations and ignorance of these widely published documents is no excuse unfortunately these days.
  12. Mike.K

    Midwest Extra 300S 80" kit & build

    Beyond my knowledge, Ben. Perhaps James could kindly comment further. Mike
  13. Pilot Ben

    Midwest Extra 300S 80" kit & build

    I wonder then, how some of the rtf ultra micro models fit into that? My first model actually went to full throttle on loss of signal, and I could barely fly, let alone worry about something I did not know about. There ought to be a set of regulations on the packaging of models like that, or perhaps radios, similar to the packaging of air rifles I would have thought...
  14. funflyjames

    Midwest Extra 300S 80" kit & build

    It is a legal requirement for ALL powered aircraft (whatever their weight) fitted with a receiver capable of operating in failsafe mode, to, as a minimum reduce the engine speed to idle on loss or corruption of signal. In other words nearly all modern radios have this function so nearly every model you fly must have the failsafe set correctly, whether the model is greater or less than 7kg. This is legally required by CAP 658 and has been for some time. Failsafe operation should be checked on a regular basis. This is also one of the mandatory questions that are asked for the A and B Certificates.
  15. Pilot Ben

    Midwest Extra 300S 80" kit & build

    Sounds good. In my opinion, as much as having the engine cut is good, I always prefer to keep it idling so that there is a change of recovery. I also can't imagine there's much of a difference being hit by a 7kg lump of metal vs a 7kg lump with an idling engine - either way your day is going to get a lot worse...
  16. Mike.K

    Midwest Extra 300S 80" kit & build

    The BMFA handbook, page 32, section 15.12(a) states, "For models 7 to 20Kg, A serviceable "fail-safe" mechanism should be incorporated to operate on loss of signal. or detection of an interfering signal. For example on a power driven model this should operate, as a minimum, to reduce the engine(s) speed to idle". So there we have it. I have the switch G on the transmitter available to cut the ignition manually with the transmitter operating and transmitting and also the mandatory fail safe on Channel 3, throttle servo to be set to retard the throttle to full close in the event of transmitter signal failure. It seems I would be in compliance. It would appear that if I wish to also have a fail-safe on the ignition, I would hae to upgrade transmitter and receiver packages. That will have to come in time. Mike
  17. Mike.K

    Midwest Extra 300S 80" kit & build

    Helpful, Ben. Thanks. Mike
  18. Pilot Ben

    Midwest Extra 300S 80" kit & build

    Shame about the model being over 7kg Mike, although it does look very sharp indeed! With regards to the kill switch; whilst some models at our field DO fly without the correct failsafe set up, it is highly unadvisable to do so. This failsafe protocol also become mandatory and enforced above 7kg too, so you will need that to kick in when the tx turns off. However, I'm not sure if it states that the engine must be killed, or simply idled, perhaps a check in the bmfa handbook could clarify? I actually tried setting up a failsafe, where when signal was lost, the engine would remain idling for a few seconds, in case the signal came back. This was changed however for an instant cut, and a gentle up elevator. I know that Rod used to use full defections on all surfaces too. B
  19. Mike.K

    Midwest Extra 300S 80" kit & build

    Images show the further work carried out. The going has got tougher but I have a result although not quite what I expected. The predicted weight of the model once the muffler has been constructed and fitted is now likely to be no less that 15Lb 12oz. So the model will be over weight for many flying sites limited to 15Lb 7oz/7Kg. Despite my best efforts, I cannot reduce weight any further so that is that. The model will not and cannot ever be flown at Fickleshole and alternative flying sites will have to be sought. Disappointing, but that is how it has panned out. There is only so much weight reduction on air-frame components that can be achieved and I`m not prepared to compromise structural integrity or safety. There are many over 7Kg models out there flying but it is quite clear to me that some traveling and membership of another flying club or two may be required if I ever wish to see this model fly. Weight wise, it is within the manufacturers figures ie 15-17Lb. This is a chunky model and is typical of American kits of about 25 years vintage. Had this been a modern laser cut kit, no doubt the end result would have been different and somewhat lighter to boot. I`ve moved the servos from the tail. The weight of the servos and push rods was an astonishing 8oz and in the wrong place! I moved three of them to forward of the wing TE which has helped C of G. The fourth servo has been removed to save weight. The move meant installing carbon fibre push rods and outer sheaths. Not cheap but effective. Installation after covering wasn`t easy. Retro re-fits are far from fun. Seemingly, I learn something new, every time I build a model. This one has been a steep learning curve. The cowl paint was difficult. The predominate issue was masking tape residue left on the paint after the tape was removed. Insulation tape would not have caused the problem. The fine line tape did not cause problems but the common masking tape did. A lesson learned and not to be repeated. Paint is a combination of two pack, single pack water based acrylic, self adhesive vinyl, and motor trade pin stripe tape. Whilst not one of my better jobs, it is passable enough. As we used to say in the marine industry, "Stand back six feet, Sir"! So the muffler construction should begin at Just Engines tomorrow. They have been instructed to build a unit that stands a chance of getting the DLE40 Twin down to or below 82Db. Other factors of course affect the noise generated, prop pitch, diameter, construction and prop speed. Pointed tipped props constructed from carbon fibre seem to be preferred by other users aiming at low noise levels. At around £25 for a prop, getting this aspect right could prove an expensive game. In addition, a noise pressure meter has been ordered and this is awaited. A Rcexl ignition kill switch has been fitted. I have a Futaba 7C transmitter and FS617/606 receivers in my stock. Whilst the transmitter switch G will kill ignition, switching the transmitter off does not. The fail safe facility is only functional on Ch3 throttle ie acting directly on the throttle servo to close the carb in the event of transmitter failure. The user manual states that fail safe is only on Ch3 only. So is this a problem? Opinions please. I would rather not at this stage have to go and buy a new Tx/Rx set up. I`m the first to admit that I`ve pushed the envelope limit with this model. I had the itch to build bigger and I`ve copped a difficult project in the process. I`m not out of the trees yet with it as you can probably surmise. "When you are at the cutting edge of development, you can regularly expect difficulties and disappointments"! This model is one of those cases. My challenge is to overcome those difficulties one by one and hopefully see this model fly. Mike
  20. Rich

    Pylon Racing 20th January

    Ahhhh, poo sticks... Soon as I mentioned RC Planes and racing I had at least 12+ hands go up when I asked them tonight... No prob's, thanks for letting me know...
  21. funflyjames

    Pylon Racing 20th January

    Hi Rich, I'm sorry but we need to limit people coming to those either entering or having an interest in pylon racing. The parking could be a problem as could the catering, so while we want to encourage cadets etc, this isn't really the event for them to come to.
  22. Pilot Ben

    Pylon Racing 20th January

    Damm that'll teach me for being so lazy and not covering my Equaliser! Hope you all have fun, and I'll try and finally get mine going after my exams...
  23. Rich

    Pylon Racing 20th January

    Hey James Could I invite a car load of Cadets? I think this could be quite exciting for them to come and see... Will ask the squadron tomorrow if its ok, and possibly ask several squadrons if they want to bring cadets along to watch...
  24. As I mentioned before, we are organising a Pylon Race meeting at Paddock Wood on Sunday 20th January. It is for E2K electric or the IC powered Club 20 airframes. As most pylon meetings are up north, we would really like this one to be a great success and then hopefully more local ones like this will take place in the future So if you have an Equaliser or any other model that would qualify, do please think about entering for the 20th. It would be great to show the other competitors that we have sufficient interest down here. If you like club pylon races, you'll really enjoy this day of racing and I can thoroughly recommend it. This is very much an entry level pylon meeting and is ever so friendly and informal and a whole lot of fun. The venue too, is superb, with a club house with tea and coffee all day, decked area with a fire pit to keep warm, hanger and for a small charge, breakfast rolls and bbq lunch! So, basically we need to know who is interested in flying and who is interested in just coming along to watch as soon as possible. If you want to come along on the 20th at all, please do email Gavin at the address below which is in the article Gavin wrote for the last SE area BMFA Newsletter. I've attached it below again as it gives a bit more information. Gavin will then let you know the address of the venue. Also, if you have any questions, please do email Gavin too and he'll be happy to answer them. Any Equaliser in the same set up as we use for club comps will be perfectly good for you to enter. Really hope you can come along to fly or to watch. Cheers, James. Ever thought of trying Pylon Racing, or competed in the past? There is a movement afoot trying to resurrect the Club 20 racing series along side the newer electric formula of E2K. There have already been race meetings in Shrewsbury and BMFA Buckminster which have been a great success. On the 20th January 2019 a race meet will be held near Paddock Wood in Kent to gain some interest in the south. E2K follows simple rules, which are available on the BMFA website, and all models have restricted airframe designs making the racing close and exciting. Where E2K is the entry level electric powered formula, Club 20 uses the old club 20 airframes with either an ASP or SC 0.32 motor (which fits in the 25 size mount). A competitive E2K model can be built for around £100 making it an affordable sport at entry level. All events are pre-entry only to allow for the racing matrix to be compiled, if you fancy having a go then please contact me at support@evolution-models.com where I can pass on details of the event to those wishing to enter. Alternatively log on to Facebook and find us on the E2K/Club 32/C2000 Pylon Racing page. Race entry normally costs £5 for the cost of field hire, at the Paddock Wood Event the club have kindly confirmed for a total of £10 they will include a breakfast roll, lunch and tea and coffee on tap. More importantly in January they have a fire pit and heated clubhouse to keep us all warm between rounds!
  25. Mike.K

    Midwest Extra 300S 80" kit & build

    It is fairly hard going at present. The paint on the cowl is giving problems despite my relatively high skill level. The cold temperatures don`t help. In addition, I had masking tape glue left on the surface of the white paint. I should have used insulating tape. With the goo removed, the white paint has suffered. Flatting down again and cussing madly, I now have a couple of coats of brush pained, water based white applied over the damaged areas. This will need flatting back tomorrow and a further thinned coat applied. More drying time then required before it will be set up enough for grey trim. This is likely to by sticky back vinyl in an attempt to reduce possibilities of further paint troubles. I just have to find a sign writer locally to cut me some appropriately coloured 1/4" strips. I`m not enjoying this paint saga much.... Red self adhesive trim tape from Halfords over white and blue on the fuselage, tail feathers and wing has been applied. It pops quite nicely with the red on the Union Flag. Quick and easy to apply....now if I can just get some grey to match the Hobby King grey covering... The prop is balanced and a Krumshield 90mm spinner has arrived. Not cheap at £27. Careful cutting and filing has been required to get it to fit the propeller. Total weight looks like being about 14.5Lbs with the Just Engines silencer and probably some ballast. Check C of G testing with a bag full of metal hung off the prop gives me some idea of what will be required. Mike
  26. Mike.K

    Midwest Extra 300S 80" kit & build

    Hi Ben, About 14.25Lbs seems to be an early figure. Added lead until the C of G appeared right. The total weight figure will be less than I added because the exhaust is still to be built. Just Engines are starting on Monday. Two week delivery is expected. The cowl and spats are cooking in front of an infra red lamp presently. I have to spray outside, then dash the parts inside to prevent paint bloom. Not perhaps one of my finest finish jobs but that is how it is with somewhat inadequate facilities and current low ambient temps. It is amazing how much spray paint gets used. All the white and blue now used. £30 so far just to finish the cowl and spats. Grey pin strip to be added in a couple of days. A long, slow and sometimes difficult process. How I crave for my old spray booth at Kemble Airfield. I`ve just received a 90mm Krumbshield? ali spinner. Heart in mouth, I`m now hacking out for the prop blades. Images of that shortly after I`ve made a mess of it! More updates soon. Mike
  27. Pilot Ben

    Midwest Extra 300S 80" kit & build

    Looking very smart! Do you have an approximation of the flying weight yet?
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