john stones 1 - Moderator Posted December 17, 2013 Share Posted December 17, 2013 pitts is no big deal to fly martyn, looking at your profile and what you've flown. youll be fine they slow down quicker throttled back, but you'll cope. have a look at a cermark pitts for strut connection its great method. had one myself, flew lovely absolutely viceless. just need to fly onto floor not float in. Quote Link to comment Share on other sites More sharing options...
Martyn K Posted December 17, 2013 Author Share Posted December 17, 2013 Cheers John & David Looks like I am going for the Pitts. While you were replying I have scaled up the 3-view to 72" span. I'll start a new build blog shortly. No votes for a monoplane yet. Martyn Quote Link to comment Share on other sites More sharing options...
Andy Green Posted December 17, 2013 Share Posted December 17, 2013 Just going back to the fuel consumption and petrol conversion, I have a guzzling Saito 180, and just converted to spark ignition - still using glow fuel. Fuel consumption has halved, and easy to start by hand every time, low reliable tick over and instant pickup. Just used a Just Engines spark conversion kit. There is no need to move to petrol, and change the compression and all the plumbing (not import and on a new build I know) Andy Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted December 17, 2013 Share Posted December 17, 2013 how about a zlin Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted December 17, 2013 Share Posted December 17, 2013 Posted by Andy Green on 17/12/2013 23:14:50: Just going back to the fuel consumption and petrol conversion, I have a guzzling Saito 180, and just converted to spark ignition - still using glow fuel. Fuel consumption has halved, and easy to start by hand every time, low reliable tick over and instant pickup. Just used a Just Engines spark conversion kit. There is no need to move to petrol, and change the compression and all the plumbing (not import and on a new build I know) Andy sounds good not got knowledge of it myself Quote Link to comment Share on other sites More sharing options...
Martyn K Posted December 18, 2013 Author Share Posted December 18, 2013 Posted by Andy Green on 17/12/2013 23:14:50: Just going back to the fuel consumption and petrol conversion, I have a guzzling Saito 180, and just converted to spark ignition - still using glow fuel. Fuel consumption has halved, and easy to start by hand every time, low reliable tick over and instant pickup. Just used a Just Engines spark conversion kit. There is no need to move to petrol, and change the compression and all the plumbing (not import and on a new build I know) Andy Hi Andy How did it affect the power output? I think Glow fuel expels more energy per burn cycle than petrol Martyn Quote Link to comment Share on other sites More sharing options...
Martyn K Posted December 18, 2013 Author Share Posted December 18, 2013 Posted by john stones 1 on 17/12/2013 23:17:20: how about a zlin I think you are trying to wind me up Quote Link to comment Share on other sites More sharing options...
Bob Cotsford Posted December 18, 2013 Share Posted December 18, 2013 there's always the big Yaks - 50 or 52. Fairly straightforward lines and a wide choice of colour schemes. Quote Link to comment Share on other sites More sharing options...
Martyn K Posted December 18, 2013 Author Share Posted December 18, 2013 Thanks Bob The YAK 50 or 54 look interesting - found a 3-view for the 50 Not especially good quality though. It would be a good exercise in planking though Martyn Quote Link to comment Share on other sites More sharing options...
mal brewer Posted December 18, 2013 Share Posted December 18, 2013 Hi Martyn,the Pitts at 72" span sounds just about perfect for your engine.I flew for years a 72" biplane with a st 3000,and it was an ideal powerplant.The model was a 1/4 scale Krier Kraft Acromaster,which weighed about 16 lbs,the power was more than adequate.Point the nose in a vertical climb,it just kept going up.I sold the model to a club-mate,who wrote it off on his first outing with it ! The model was so impressive,I've nearly completed a copy of it........Mal Quote Link to comment Share on other sites More sharing options...
Martyn K Posted December 18, 2013 Author Share Posted December 18, 2013 Thanks Mal That is very reassuring... Also looking at the YAK54 - I have discounted the YAK 52 - too agricultural That looks like it may be a bit on the edge of critically unstable. Just looking at it - not measured it, but the tail volume coefficient looks to be on the low side. Nice looking aeroplane though with big moving surfaces. These radial engines are popular aren't they? Martyn Quote Link to comment Share on other sites More sharing options...
john stones 1 - Moderator Posted December 18, 2013 Share Posted December 18, 2013 yaks are fabulous martyn. don't bite you at all same with sukhoi's, they can bite if you get really giddy. they're as common as extra's though, and david's got his heart set on a pitts Quote Link to comment Share on other sites More sharing options...
Martyn K Posted December 18, 2013 Author Share Posted December 18, 2013 Thanks John. Yes - YAK 54s are as common as muck.. Google images has thousands of photos of models and very few real ones. One other advantage of the Pitts is that it will be more compact and will fit in the car. That may be a big deciding factor.. Martyn Quote Link to comment Share on other sites More sharing options...
Sigh Posted December 18, 2013 Share Posted December 18, 2013 what about this? Quote Link to comment Share on other sites More sharing options...
Martyn K Posted December 18, 2013 Author Share Posted December 18, 2013 Thanks, but I am looking for something that's 'rare'. I like Extras but there are too many of them at this size. M Quote Link to comment Share on other sites More sharing options...
Martyn K Posted December 18, 2013 Author Share Posted December 18, 2013 Mind made up! I am going for the 28% Pitts model 14 Thanks for your thoughts and guidance. BW Martyn Quote Link to comment Share on other sites More sharing options...
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