Andrew Dale Posted July 20, 2007 Share Posted July 20, 2007 Steve - in answer to your question about C of G: I found a great site at http://www.adamone.rchomepage.com/cg_calc.htm on which you can calculate C of G. The only difficult factor I have found is that the Spitfire does not have a "wing tip chord" as it effectively comes to a point. However, I measured everything at the end of the aileron and also at the very end of the wing tip and here are the two results: With Static Margin (SM) at 10% (must be between 5% and 15%) the C of G is back from the leading edge by 4.75 inches using aileron-end measurements or 5.25 inches using end-of-wing measurements. 5 inches is therefore the average and looks to be spot on! I only did the calculations AFTER setting the plane up! About 4 inches would equate to a 15% SM which the web page says is best for greater stability BUT makes the plane nose heavy. Seems to match practical experience. Quote Link to comment Share on other sites More sharing options...
Stuart Gibb Posted August 21, 2007 Share Posted August 21, 2007 Andrew/Steve any chance you could send me the gear strengthening PDF as I have just broken my wheels on a deadstick. Also what was Paul Heckles' reasoning behind ignoring the CofG in the manual? Quote Link to comment Share on other sites More sharing options...
Dennis Norman Posted October 1, 2007 Share Posted October 1, 2007 Hello Andrew Could you please e mail me the pdf of the retract mount strengtheningmy e mail is [email protected]]/forum/smilies/big_smile_smiley.gif[/img][email protected]][email protected][email protected]Thanks www.densplanes.co.uk Quote Link to comment Share on other sites More sharing options...
David Ashby - Moderator Posted October 1, 2007 Share Posted October 1, 2007 Hello Dennis, Nice to hear from you, I read your posts with interest on rc groups. I see you've moved on to jets now! David. Quote Link to comment Share on other sites More sharing options...
Steve Ebbon Posted October 11, 2007 Share Posted October 11, 2007 Well finally got round to maiden the Spit by the club expert, no drama, flew very smoothly and scale like with the RCV 91-CD up front sounded very realistic too. Just one problem mine also tips onto nose on landing so will adjust for more elevator movement and rake U/C forward a few degree's. All up weight 10.5 Ibs just needed to add 2 strips of weights fixed to engine mount and battery strapped to the other side of mount. Quote Link to comment Share on other sites More sharing options...
Lindsay Todd Posted November 1, 2007 Share Posted November 1, 2007 Read all the comments with great interrest as I am just about to start building mine and there are obviously a few things to take on board. I was planning on starting with the cockpit area and making this more appropriate by putting a false floor and instrument panel, may also look at sliding canopy as the moulding is well shaped and quite robust.Also considering flaps on the wings although this needs carefull surgery or I'll end up having a respray job. Motor will be an OS120 4 stroke, have made working exhausts in the past but I think the space maybe to limited with the bulkhead moulding. Quote Link to comment Share on other sites More sharing options...
Steve Ebbon Posted November 7, 2007 Share Posted November 7, 2007 Lindsay look forward to hearing how you get on building and flying your Spit. I flew mine for the first time yesterday (no drama flies like its on rails) after having continual problems getting the engine to run without cutting out below 20 percent throttle, fitted an on board glow unit which cured the problem and as an added bonus, I don't have to conect up a glow starter now, I would highly recommend these little gadgets especialy on inverted engines. Working exhausts would be great but too complicated for me to fabricate even if there was room for them, I compromised by drilling holes through the exhaust stubs into the cowl, helps with cooling. But be ready with the glue as I'm forever snapping mine off, copper pipes brazed to a plate would be the answer and would also help with CG. Quote Link to comment Share on other sites More sharing options...
Lindsay Todd Posted November 9, 2007 Share Posted November 9, 2007 Steve, I like your idea of the copper pipes for the exhausts, as I knocked two of the things off the cowl last weekend! Glad to hear yours fly's great. I am also working on another model so it will be the new year I guess before mine is ready but I'll feed back anything I find that might be usefull. Quote Link to comment Share on other sites More sharing options...
Chris Hemming Posted January 2, 2008 Share Posted January 2, 2008 Am starting the build of my kit this month, and would be grateful if anyone could send me the pdf of the undercarriage strengthening mods, we fly from a rough(ish) grass site and I will need all the help I can get to keep the wheels on! Cheers in advance. Quote Link to comment Share on other sites More sharing options...
jason parker Posted January 29, 2008 Share Posted January 29, 2008 Just starting my spit, could someone please tell me what paint colour I need for touching up? Quote Link to comment Share on other sites More sharing options...
Peter Ford Posted January 31, 2008 Share Posted January 31, 2008 I have just flown my TG Spit. for the first time. This is a very sweet flyer. Retracts have been improved with oleos from YT International.Almost forgot to mention mines electric.Tornado Thumper 6364 motorJeti 100A ESCTornado pro 36 v battery pack (2 X 18)16 X 10 APC prop1400 watts at @ 40Amps .112 watts per pound!!All Up Weight 12.5 pounds. No added leadAbsolutely rocks! Quote Link to comment Share on other sites More sharing options...
Mike E Posted October 1, 2008 Share Posted October 1, 2008 Hope this is not posted too lateIf any one has the pdf for strengthening the retracts on the Spit I would modt grateful if it could be sent to Mike e mail address [email protected]Many thanks Quote Link to comment Share on other sites More sharing options...
Lindsay Todd Posted October 19, 2008 Share Posted October 19, 2008 Interresting problem with my retracts, the valve will not dump the pressure, once they are up they stay up, hence has not flown yet. Anyone else had this problem? contacted cml for assistance, anyone got photos of there set up?cheers Quote Link to comment Share on other sites More sharing options...
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