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Toni Reynaud

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Everything posted by Toni Reynaud

  1. Toni Reynaud
    They aren't all gone yet. There's an old gent down the road from me who flew Mosquito night fighters with 23 Sqn at the end of the war. Brave man.
  2. Toni Reynaud
    Finally got the JP 99% finished. Even to my low standards, this is just about the worst finishing job I've ever done. Covering a whole plane, as opposed to its constituent parts, is not easy. I had also insufficient red solarfilm so I bought some stuff called EasyCover. Easy it ain't! On a open framework like wings it would be OK, but on solid wood, and compound curves of a fuselage it's useless. However, I persevered and got to a stage where, from a distance, it doesn't look too bad. The system delivers about 500 gm plus of thrust, measured by placing the plane nose down on a scale and opening the throttle. It should fly OK. Edited By Toni Reynaud on 30/01/2020 11:03:31
  3. Toni Reynaud

    Toni Reynaud posted a gallery image in Member Albums

  4. Toni Reynaud

    Toni Reynaud posted a gallery image in Member Albums

  5. Toni Reynaud

    Toni Reynaud posted a gallery image in Member Albums

  6. Toni Reynaud
    Nice job with the cylinder mounting. You may wish to consider lining the inside with light fibreglass to reinforce the plastic moulding. I recall that that was the bit that tore/split with the vibration.
  7. Toni Reynaud
    JP build just about done. Radio installation sorted, controls trial fitted and removed until the covering is done (that includes the hinging), pilots more or less in place, just covering left to do. Red film on order, the rest from the left over bits box.
  8. Toni Reynaud

    Canopy trial

    Toni Reynaud posted a gallery image in Member Albums

    Canopy trial
  9. Toni Reynaud
    General look at pilots in position
  10. Toni Reynaud
    SIlly question maybe, but I notice there is no taper on your thrust tube. Shouldn't it close down a bit so the exit equals the area of the fan duct minus the area of the motor to maintain the airflow and thrust?
  11. Toni Reynaud
    Started on the jet Provost a couple of weeks ago. Canopy and intake mouldings to hand (very quick service from TN Designs!). All parts cut out, wings complete, fus started, but with fan on order from Banggood I'm waiting to be able to complete the fan fit to make any more progress. All done with wood from the spares and leftovers box!!
  12. Toni Reynaud
    Only just found this thread. I built one of these about 1978 or so. I powered it with an OS25, flew it rudder elevator and throttle, and it was a beauty. it flew really nicely. The only thing that went wrong is that the vibration eventually dislodged all the dummy cylinders and I got fed up with sticking them back on so I converted it to a 504k with a big cowling. I'm not sure what happened to it - I think I passed it on to someone else rather than have the hassle of transporting it back from Germany. Edited By Toni Reynaud on 02/01/2020 17:37:03
  13. Toni Reynaud

    Toni Reynaud posted a gallery image in Member Albums

  14. Toni Reynaud

    Toni Reynaud posted a gallery image in Member Albums

  15. Toni Reynaud
    Just found this thread. Looks really good, and I'm glad it flies OK. Well done.
  16. Toni Reynaud
    Good link. Thanks for that - I gave up when looking for it.
  17. Toni Reynaud
    Talk to anyone who has a motorhome, caravan or boat. They tend to run on solar-powered 12V systems with no problems. The second paragraph from OZ e flyer is a good description and starting point.
  18. Toni Reynaud
    When I was in training some of the equipment was american - they had what we called "knicker switches" - up is on, down is off! I do use a throttle kill switch on all my leccy models via a programmable Throttle - Throttle mix. Spektrum DX7
  19. Toni Reynaud
    Chichester and District Model Aero Club (CADMAC). About 127 members. £84 per year including BMFA costs. Joining fee £20. Hard runway on an Army base(airfield) for weekends/Bank holidays, grass farmer's patch 7 days per week (No I/C at weekends) and one slope.
  20. Toni Reynaud
    I remember a flying wing I made back in the early 80's, powered by a Webra Bully. Lovely and stable at first, then and the fuel was used up and the balance point moved back it got VERY sensitive. Great fun, but I had reflexes back in those days.
  21. Toni Reynaud
    Cloud Models/Galaxy Models Jester. Came to me part built. I electrified it with a 4-Max motor I had in the spares box, added a steerable tailwheel, and decorated it as a WWII US Primary trainer (sort of - the underside is all red for better visibilty). It flies nicely and is fairly aerobatic. I just hope I can get enough practice to make it look a little neater in some of the manoeuvres. I have added cooling air scoops to the front sides and exit holes under the rear of the fus as the battery was getting fairly warm.
  22. Toni Reynaud
    Cloud/Galaxy models Jester
  23. Toni Reynaud
    " Off the top of my head, the simple formula used takes no account of inefficiency around centre of prop, inefficiency around tip of prop, speed differential between static body of air and the air moved by the prop, drag of power train components in the airflow... among what are probably many other real world effects " Absolutely right, BUT if all calculations are made on the same basis and contain the same errors, then the comparitive results are acceptable. It all started ages ago because I wanted some idea of the different size of prop I would need when changing from a direct drive Speed 400 to a 2.5:1 geared Speed 400 - about 40% less rpm, approximately the same power, so what size prop would work?   Edited By Toni Reynaud on 20/08/2019 13:42:10
  24. Toni Reynaud
    I suppose the bottom line is that it's always worth trying different props, sometimes at odds with what we might expact to work. As long as the plane gets off the ground and can fly safely enough to check the characteristics with the new prop, all should be well. LiPo duration also comes into play. I will go away and try a 3S and bigger prop instead of a 4S in my Travelair at some stage.
  25. Toni Reynaud
    The test system was fairly basic - a 90 degree rig with one arm vertical with the motor mounted on it, and the other horizontal reaching out to an electroni kitchen scale for thrust measurments. We were using a Medusa Research Power Analyser Pro connected to a PC, and a selection of battery packs and props. Sanyo SCR 2400 NiCd cells and a Castle Creations 25A ESC were used for all tests. This graph is representative of the results we obtained.
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