bouncebounce crunch Posted June 12, 2013 Share Posted June 12, 2013 Chris, dont you worry about that flying style. Getting that final aproach on models i learnt on gliders, does this equate to powered? maybe. On those speedy types, landing is decidedly faster as in real life, but changes have been made by modellers to reduce this. have i lost models with too steep a banking roll? Yes. Too much rudder? yes, too much landing speed? no . but damage wa s part of the result. so flying our models like the real thing rather than darting all over the sky and expecting a slow walking pace when landing is one of those mixes that conflict at times. RE. bounce boUNCE CRUNCH. Quote Link to comment Share on other sites More sharing options...
Gavin Mack Posted August 16, 2013 Share Posted August 16, 2013 How about repainting it to this **LINK** Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted August 16, 2013 Share Posted August 16, 2013 It was an interesting choice of aircraft to make. Hope to take my daughter to see the film this weekend, not that I want to see it of course Cheers Danny Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted August 16, 2013 Author Share Posted August 16, 2013 Posted by Gavin Mack on 16/08/2013 13:28:58: How about repainting it to this **LINK** IF YOU THINK I ... no, probably shouldn't write that post. Suffice to say I don't think mine will be changing colour any time soon Gav. Did the Comet make it into the film then? do we know? Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted August 16, 2013 Share Posted August 16, 2013 From all the trailors I have seen, the DH88 is definitely in the film. I haven't seen it yet perhaps this weekend. Looking through the cast Bulldog has to be the 88 surely? Bulldog's voice is done by John Cleese so could be fun Cheers Danny Quote Link to comment Share on other sites More sharing options...
Peter Jenkins Posted August 16, 2013 Share Posted August 16, 2013 Chris An easy way to achieve washout is to set both ailerons up slightly when at neutral - if you see what I mean. Try the stall at a sensible height with different amounts of up aileron to determine an optimum position for your "washout". Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted August 16, 2013 Author Share Posted August 16, 2013 Thanks Peter, that is something to consider. Although it's also been suggested to me that washout effectively reduces lift which means the model has to fly even faster. I think flying this model just requires confidence, which I've been slowly building on other models for a while now. Danny, Bulldog is indeed the DH88 in the film. Quote Link to comment Share on other sites More sharing options...
Peter Jenkins Posted August 17, 2013 Share Posted August 17, 2013 Hi Chris Yes, washout will reduce the total amount of lift but it will be a trade off where you will avoid a tip stall as the centre section will stall first. So provide your approach speed has a decent margin over your stalling speed you will be fine. Obviously, carry out a check of stalling speed at height and do several practice approaches. Pick a day with a bit of breeze and your ground speed will be signficantly reduced so the higher airspeed won't look so ....high! Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted September 22, 2013 Author Share Posted September 22, 2013 Thanks to all the encouragement on this thread, an extremely enjoyable afternoons flying was had today. Thanks everyone for the push I needed. It turns out that all the flying I've done this summer has massively boosted my confidence, and leaving this model for months on end, has meant I've forgotten al the hours spent on it. So, today, without apprehension, some great flights were really enjoyed. Great big turns with lots of power on, dives into fast low passes and even a loop . Landings are still interesting. Half flap got it down where I wanted but we still had a big bounce. Full flap meant a nice steep approach was achieved without building up speed. But now, I held off too long, trying to avoid the bounce. A tip stall at about a foot up just reminded me that the tail I was holding does indeed belong to a tiger. What a great Tiger to fly though, with the right flying style, she's a real pussycat. Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted September 22, 2013 Author Share Posted September 22, 2013 Quote Link to comment Share on other sites More sharing options...
Biggles' Elder Brother - Moderator Posted September 22, 2013 Share Posted September 22, 2013 Nice one Chris! I always knew you had in in you! BEB Quote Link to comment Share on other sites More sharing options...
Martyn K Posted September 22, 2013 Share Posted September 22, 2013 Absolutely lovely Chris. Perhaps a 2014 Mass Build contender.. (just kidding) M Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted September 22, 2013 Share Posted September 22, 2013 I was lucky enough to be flying with Chris today and I have seen every previous flight of the DH88. I must say Chris was totally relaxed with the model today. It will bite sure, but it is nothing to be really frightened off and Chris flew it really well. Wish the weather had been better at the RCM&E do, perhaps more could have enjoyed seeing it fly. Sell it.....I think not... I suggest you get some retracts Chris Cheers Danny Quote Link to comment Share on other sites More sharing options...
Terry Walters Posted September 23, 2013 Share Posted September 23, 2013 Lovely pics Chris - it is a great subject and glad you are able to fly it more confidently now. Now I really must get the better of my 'dangerous boy' VMAR Fournier RF4 - always exciting - superb in the air and an expert tip staller!. Terry Quote Link to comment Share on other sites More sharing options...
Colin Leighfield Posted September 23, 2013 Share Posted September 23, 2013 I'm always interested in the tip stall/ wash-out issue and the "quick-fix" of a bit of upwards reflex on the aileron is an attractive idea for a wing that is already built. As far as the conclusion that there will be some loss of lift, while that's my first reaction, I'm starting to think that it might not be much of a problem. It's doing the same as wash-out in the sense of reducing the effective angle of incidence of the whole wing, but concentrated in the outer wing. This should mean that in trimming for level flight, the model will compensate by adopting a slightly greater angle of incidence overall and more or less cancel out the difference. Does that make sense? In practice that would mean a slight difference in the elevator trim so the nett effect would be a small increase in drag rather than a loss of lift, but in practice it might hardly be noticeable. Of course this might be a load of waffle but I had a late night! Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted September 23, 2013 Author Share Posted September 23, 2013 Thanks for the comments every one. Much appreciated. Colin I did think long and hard about slight up ailerons, and I agree with your conclusions. However, the effect of reduced lift must be very similar to reducing wing area. If the wing area were reduced, the wing loading would be higher. Higher wing loadings mean a higher minimum speed. I've never quite understood why the pointy wing tip plan form is so prone to tip stalling. (I know all too well that it is though). So the decision was made to leave it as is, and do a better job of flying the model. So, Danny (thanks for the moral support by the way, and for some of the pics. thanks to Nick Green for the others) what are my options on retracts. ASM used to sell a set of air retracts for this model which had the cylinder facing on the opposite direction. What I'm wondering is: Are there any differences between units that retracts sideways, and those that retract backwards? Particularly in respect of the direction of landing loads. Quote Link to comment Share on other sites More sharing options...
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