Tony Jones Posted June 25, 2007 Share Posted June 25, 2007 Putting threaded standoffs through the mounting lugs is a great idea. Instant adjustment of right and down thrust. Quote Link to comment Share on other sites More sharing options...
scott cuppello Posted June 26, 2007 Share Posted June 26, 2007 Have just started my first electric conversion, and thought about this, but in the end, i purchased an engine mount from BRC, which still had to be modified but is spot on, the main advantage of it for me, as it's my first conversion, is that you end up with the same mounting points as the IC engine would have used....a good starting point, especially in my case with such a weird plane....the Gee Bee Racer...now I just have to work out if the Chinese really DO mean C of G 110mm back from the leading edge!!!! Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted June 28, 2007 Share Posted June 28, 2007 Hi chaps, if you look at the mounting plate (1/4 ply) it mounts on the original bulkhead with allen keys, these line up eith the IC mount. 4 bolts and its back to IC. The threaded rod allows the motor to be positioned EXACTLY where you want it, I never can find a comercial mount that positions the depth just where you want it LOL The one error I did make, is to not use a locking nut against the rear nut (bulkhead side), that way if you take the motor off the settings are not lost. The other thing is the studded rod is less than a pound for a meter from B and Q. If you look really closely you will see that they are not studding in this case but 4 inch long 4mm bolts. The heads are counter sunk and epoxied to the back of the leccy 1/4 ply mount. Good luck with the Gee Bee a challenging model if slowed down too much LOL Quote Link to comment Share on other sites More sharing options...
scott cuppello Posted June 28, 2007 Share Posted June 28, 2007 Yeah, ta Danny, now Iv'e finished it.....I'm scared to death of it! 1.5kg....little stubby wings....as soon as this weather has cleared up, we shall see! Mind you....it looks stunning!I have to admit, I only have one reservation about this conversion [which doesn't apply to you, as you have used bolts], my experience of the sort of threaded bar often available is that it is very weak, I wouldn't be tempted to use it for anything over an inch or so, I'd go for bolts. Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted June 28, 2007 Share Posted June 28, 2007 Hi Scott, If its the same Gee Bee a friend has got it flies really well. The threaded rod is a lot stronger than you think (I thought the same LOL). Used singularily I would agree, but combined they are plenty strong enough, we have used them in models with 5KW motors and they are solid. They do give and bend on a serious crash, but I would rather that than damage the motor. Quote Link to comment Share on other sites More sharing options...
scott cuppello Posted June 29, 2007 Share Posted June 29, 2007 Good point about the mounting, bar is cheaper than an outrunner! Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted June 29, 2007 Share Posted June 29, 2007 LOL indeed Scott, let us know how the Gee Bee goes? Quote Link to comment Share on other sites More sharing options...
scott cuppello Posted June 29, 2007 Share Posted June 29, 2007 I will, for sure, just as soon as the weather picks up/wind drops....whenever that will be! Mind you, at least I'm not having to paddle round the streets in a boat, so can't really whinge at lack of flying time! Quote Link to comment Share on other sites More sharing options...
Danny Fenton Posted June 29, 2007 Share Posted June 29, 2007 I know what you mean, I am starting to look at Catalinas and Sunderlands LOL My thumbs are starting to seize up! Quote Link to comment Share on other sites More sharing options...
scott cuppello Posted July 4, 2007 Share Posted July 4, 2007 Well, my hunch was right, C of G too far back, a valuable lesson learned while I repair the wingtip! It will be fast I think, but the ability to fly also helps! We will try again next week....or so. Quote Link to comment Share on other sites More sharing options...
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