John Timmis
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Everything posted by John Timmis
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Mercury kit, Aeronca Sedan
John Timmis replied to Erfolg's topic in Building from Traditional Kits and Plans
Hi I remember building one of these back in the 70s. Nice traditional build. Covered it in nylon. I think it had an OS25. Not over powered as I remember. Good luck. John -
One Sunday in 197? a friend & I had enjoyed a pleasant afternoon slope soaring on Moel Famau & were driving home in his Morris Marina. Still miles from anywhere when the engine died. The electric petrol pump had failed. A cunning plan saved the day & got us home (50 miles) in time for tea. Syphon petrol into the windscreen washer bottle, connect up the outlet from the pump to the carb & drive home using the thumb operated washer pump. Jobs a good un.
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Hi Danny It looks as if you have had a busy start to the year. I'm amazed by your attention to detail. It looks superb ( best Yo Yo I've ever seen). I must get on with mine, you're making me feel guilty. Happy new year. John
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Hi It is said that you never forget your first............. Well my first was 'Workmaster' by Ron Moulton, published in Aeromodeller. I always wanted my models to look like proper planes so this was ideal being a slightly simplified 1/9 scale Auster. 48" span , powered by a 1.5cc PAW & guided by sc Macgregor (super regen) & an elmic conquest escapement. This is the model that taught me to fly rc. It looked good, was simple to fly, I don't ever remember it crashing & I certainly never had to repair it. I also discovered that it would fly very well free flight when I once launched it without switching on the radio. That ws a long chase. If you google " workmaster by Ron Moulton ' you can find the details. It would still make a super trainer/ sport model, especially if enlarged about 50%. After that came a Sharkface & then Force Four, a single chanel slope soarer by a young Chris Foss. Happy days. Happy Christmas. Cheers John.
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Hi Chippie control deflections. I measured the deflections this morning. This is the way the chippie is set up for me. Elevator: 10mm up &down. Aileron: 12mm up & down. Rudder: 35 mm each way. Flaps: 30 degrees ( they are either up or down). These are low rates, I use these all the time & they give me a model which is quite docile & flies in a scale manner. High rates are set at 15mm for the elevator & 20mm for the ailerons but that is too much for me. I have the expo set at 70%. The model weighs 8lbs. There is no extra washout on the wings & the cg is exactly as on the plan. It will fly round quite slowly & in a scale manner. This is the first model I have flown with flaps. I have not found any change of trim when the flaps are lowered & they certainly do steepen the landing. Check the stall at a safe height. IT WILL STALL & IT WILL DROP A WING. It spins very well but the recovery is easy. I was caught out once on a landing which I overflared slightly. The wingtip suddenly dropped from a height of !8 " & the resulting cartwheel broke the fuselage in two. DON'T DRAG IT IN TOO SLOWLY. Hope this helps, it is,at least, a starting point. Good luck with the maiden flight . Enjoy the model. Cheers John
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HI Danny Well impressed by your bits & bobs. Cheers John
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Hi Danny Well done . That looks brilliant. The wheels look good too. I'm gobsmacked........ John
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Hi Danny Well done . That looks brilliant. The wheels look good too. I'm gobsmacked........ John
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Hi Danny The chippie looks superb as usual. The hinges sound to be a bit of a pain. I can see that the wing hinges could be bushed, but not much chance of doing the tail hinges that are glued in & buried. Have to make them part of the DI. I checked the hinges on my first chippie ( which has been flown for several months) & the hinges seem ok so far. They were cut from Formica not fibreglass. Mustang would be a great new winter project , This chippie has been a great project but I am sure there is still more to learn. I am just starting the BT Hurricane. Cheers John.
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. Hi folks, Here are some pictures to show this months progress. Its been a bit slow. The cowling has been fitted. The motor can be inserted through the hole behind the spinner. The top & sides of the cowl remove to give good access to the 6s battery which fits between the original engine bearers. There is scope to move the battery to adjust the cg. The removable cowl is located by a dowel peg at the rear & is held closed by 4 magnets on the lower corners. A dummy Gypsy Major was cobbled together from bits & pieces. The space below the battery box will be enclosed to form a cooling duct. There is space within the duct for the rx battery if necessary. Some work has been done in the cockpit area. Very enjoyable though quite time consuming. Most people seem to look at the cockpit first. Such a big space needs to be filled up with something to catch the attention. Given the lack of clarity of the canopy I have just tried to give the impression of something going on in there. Still bit more to do but nearly there. Making the canopy frame turned out to be a bit of a fiddle. The parts from the Traplet kit were useless & I laminated new frames from 4 layers of .8mm ply. This shows the frame former & the jig to hold the 3 frames in place while the assembly was glued together. All held together by temporary side pieces & ready for the .4mm canopy roof. Jobs a good un. Cheers John
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Fabulous result Danny Hope to see it in real life soon. John
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Hi folks, While waiting for the cowl & canopy to be delivered I made a start on the cockpit interiors. Only basic stuff so far, just seats & cockpit walls. I used Danny's method with the metal foil, it works really well. When the cowl arrived it was damaged with two tears on the edge. Traplet replaced it willingly enough but it took another week. On the previous order it was the canopy that had to be returned because it was badly distorted. Is it just me or has anyone else had problems? The rear cockpit has a full seat but the pilot in the front will have to sit on the servos. The cowl is more or less fitted now. The top & sides will be sawn away to give battery access but firtst I have to make a dummy engine, after that the front / bottom section can be glued in place. This afternoon I suspended the whole model to check out the cg. No problem. As it stands here the weight is 7lb 4oz. A bit less than I expected. Getting there now. Cheers John.
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