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David Davis

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Everything posted by David Davis

  1. I have a Q Silencer on my Enya and it sounds gorgeous. I hate noisy two-strokes anyway! Currently it's mounted in the club's Boomerang trainer. I wince whenever a novice pilot takes off with that jewel in the nose.
  2. Confusingly Kyosho market two different models under the name Calmato. One is a conventional high wing trainer, the other is a low wing sports model. I am interested in the low wing version and I won't be using the Calmato as a trainer but as a way of improving my flying. Picture of the high-wing trainer here: https://www.weymuller.fr/article/kit_calmato_alpha_40_trainer_ep_gp_rouge_160m.html
  3. I don't know whether this is of any help or relevance but I'd always run my Japanese and Chinese four-strokes on fuel containing 10-15% nitro and 15% oil. I had another mix, 5% nitro and 15% oil, for my old Lasers and what two strokes I continue to run. One day I arrived at the flying field having left the high nitro fuel behind. So I filled the tank with the 5% stuff. The engine started and ran perfectly. I did the same trick yesterday with my Thunder Tiger 54.
  4. I flew the Reserve Baron yesterday for the first time since repair. We had a windless and sunny afternoon though it was a bit cold. The model flew well enough but it still needs a few minor trim alterations. The threads in the Thunder Tiger 54's exhaust port have stripped but I glued the exhaust pipe in place with half hour epoxy. It works but you cannot change the position of the exhaust pipe of course. The orange and flourescent yellow patches, which I'd cut from remnants, showed up well in flight. Work continues on the British Baron with its depron wing ribs. I posted the same picture of the wing under construction on a French website Le Confrerie Des Barons or the Brotherhood of Barons in English. Imagine my surprise when the designer of the Baron, Christian Chauzit himself expressed interest in my experiment!
  5. My club has acquired a brand new unstarted Calmato D ARTF still in its box. This is the smaller version of the Calmato it has a 1.6 metre wingspan and is intended for a 46 two stroke. I've flown a couple of the larger ones which were very pleasant to fly and I've been told that the smaller one is even better. The club wants to sell the model and I've expressed an interest in buying it; it's my birthday in March! I have the following engines which I could fit to the model: Thunder Tiger 46 PRO; OS 46 AX; Enya 50; Irvine 46 and Irvine 53. I also have a Laser 70 not doing anything and an electric motor which would do the job but I'm not into electric power? 😏 For those unfamiliar with the Calmato D, this link will inform you: https://www.weymuller.fr/article/calmato_alpha_40_sport_rouge_160m.html
  6. I flew the Baron as pictured below for the first time since repairing the wing. See before and after below. We had a windless and sunny afternoon though it was a bit cold. The model flew well enough but it still needs a few minor trim alterations. The threads in the Thunder Tiger 54's exhaust port have stripped but I glued the exhaust pipe in place with half hour epoxy. It works but you cannot change the position of the exhaust pipe of course. The orange and flourescent yellow patches, which I'd cut from remnants, showed up well. __________________
  7. Both the Radfio Queen and the Telemaster have lifting section tailplanes.
  8. When I was fourteen years old I built my own radio. It had a range of about four feet. Then I discovered girls...
  9. Too cold to go flying so I started work on my other Baron's new wing. I am using depron for the wing ribs. I have never used it before, neither have I used De Luxe Materials' Super Phatic or UHU POR before. They are both excellent.
  10. Thank you for the replies. I used to have a Radio Queen initially powered by an OS 52 Surpass. Pictured below with my much younger self. It flew ok well throttled back but it flew better when fitted with an OS 40 Surpass. I used it to give elderly beginners their first experience of wafting around the sky. I have just consulted the plan and have discovered that the engine bearers are spaced for an ED Mark III 2.49cc diesel engine. I believe that the Channel Crossing model was powered by a 3.5cc diesel. I am beginning to think that perhaps a far less powerful electric motor is the way to go. Something which produces about 250 Watts. Less power, less thrust less chance of violent climbing.
  11. I am familiar with downthrust having flown free flight models in my youth. I will be seventy-six next month! 😄 The model in question is a Ben Buckle Radio Queen, powered by an electric motor and built by my protogé Frans Cooremans, a seventy year-old Belgian. I'm very much an i/c engine man myself but having fitted three electric motors to this model I'm beginning to become more knowledgeable! Initially we fitted a motor with a similar power to that recommended by 4-Max. https://www.4-max.co.uk/po-5055-595.html Even with a 3S LiPo this set up proved to be greatly over-powered. if you advanced the throttle the model would climb rapidly and if you didn't correct things quickly enough it would stall. We installed two less powerful electric motors ending up with an Axi 2820/10 which I had been given a long time ago and while flight characteristics had improved they were not really suitable for a beginner. If I flew it I could anticipate the stall, reduce power and put in down elevator but Franz doesn't have my experience so sometimes he was flying about in a series of barely controlled stalls. We were trying a smaller propeller yesterday when the Axi blew apart on take off. We were unable to find the rotating piece (the can?) so unless we find it we will have to buy another motor. When weighed on my kitchen scales in November the model weighed 5lbs or 2.2 kgs and the centre of gravity is as per plan about 4.5" (11.5 cms) from the leading edge. So some questions for the cognoscenti: Would this be a suitable motor for the Radio Queen given that the motors we've used so far have been too powerful? https://www.weymuller.fr/article/moteur_brushless_protronik_dm2615_1050.html I'm thinking that 50 watts per lb will be adequate for a vintage model like the Radio Queen. If it's not suitable what would you recommend? Should we incorporate some down-thrust, if so how much? We are going to have to rebuild the motor mount anyway. Is down-thrust required only when power is excessive? The original Channel-crossing Radio Queen was powered by an ED Racer and having just inspected the plan, it states that the engine bearer spacing is suitable for a 2.5 cc diesel engine. Incidentally, I had a look at one of the club's four channel ARTF trainers yesterday. It's powered by an OS 46 AX. It had a substantial amount of down-thrust, I would estimate 5 degrees or more.
  12. I have been working on my reserve Baron. Once I'd repaired the wing, the fuselage and tailplane looked scruffy so I removed the old covering, repaired any damage and re-covered them. The grey didn't match anyway because the film was from two different manufacturers. I've used off-cutts from rolls of flourescent yellow and orange. I should be able to see it in the sky! I hope to maiden it this weekend.
  13. Hi Ronron, Thank you for the information but it will be difficult to change the incidence of the tailplane on my models as both are firmly glued into place. I'll consider the modification if I have to build another. My Barons are both powered by four-stroke engines so there is no need for weight in the front. I give a prize to the leading pilot who uses a four-stroke engine in the competition. I won my own prize in 2021 so I gave it to the second man! Please come over and introduce yourself in June. I speak French fairly well. I will be flying the number 247 Baron finished in either British or Ukrainian markings something like in the picture below. There may be another expatriate Englishman in the competition. He lives up in the Somme region. Several of my French club mates participated in the competition in 2019 but they now think it's too far to drive! 😄
  14. Hello. What information are you looking for on which aeroplane? Quelles informations recherches toi et quel avion?
  15. I am finishing off a DB Sport & Scale Auster. I haven't yet decided which motor to fit but a Thunder Tiger 91 FS is certainly in the running. I usually run this engine, and all of my Japanese four-strokes, on fuel containing 10% nitro and I have been given a gallon of 15% nitro. The model is covered in white Solartex which is fuel-proof but which soon starts to look scruffy unless it's coated with something. I was thinking of using a water based polyurethane floor varnish brushed on over the Solartex but I would like to know whether this type of varnish will withstand fuels containing this much nitro.
  16. Boris's newly repaired wing makes the rest of the model look scruffy, besides the new grey film does match the older covering. I have decided to recover the fuselage and tail surfaces too, that way I'll be better able to check for structural damage. I've been impressed by UHU Por impact adhesive. Boris is mounted on a block of depron. You can pick up him up by the head and wave the wing about no bother! I'm looking forward to using this glue on the British Baron with its depron wing ribs. Has anyone used this glue as a canopy glue?
  17. Martial bliss? You'll never get them to bind if they're fighting one anther.
  18. You may find Mark Robinson's video on covering with doculam interesting Mike.https://www.youtube.com/watch?v=_pe2M8UhD8g
  19. How is the Domino's nose-wheel pushrod attached to the servo? I always adjust things mechanically before going to the computer in the transmitter, a DX9 in my case. Mind you I'm Old School.
  20. Thank you gentlemen for all your responses. In the end we found out that we had sufficient Solartex and Oratex to cover the Radio Queen. Having sorted out problems caused by excessive power from the motor, the balance point and inadequate rudder travel, the model now flies very well. We're only waiting for some better weather.
  21. It's change. Whether it's progress is a matter of opinion.
  22. As a matter of fact I have been following his other thread. It would appear that there was nobody at his first club who knew how to tune a simple two-stroke engine. A sign of the times I guess.
  23. Can't help thinking that you'd have saved all this trouble and expense if you'd fitted a decent two-stroke to the model. 😏
  24. Thank you John, I'll do my best to make them as identical as possible though the wing structure will be different. I have discovered several metres of flourescent yellow film in the workshop. Perhaps I'll use that to cover Boris's wing retaining the black and white undersides for the British Baron. Normally the darker covering goes on the underside of the wing doesn't it?
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