Yorkman Posted November 13, 2009 Share Posted November 13, 2009 The York originally flew with 2 1900 7 cell nicad packs-and 'performance' was marginal at best-though the MTOW take-off runs were very scale!-so last year I upgraded to Lipo and UBEC as discussed elsewhere on this forum...but, musing the other day, quick calculation in head 7x1.2=8.4volts from the nicad packs...same as a 2s lipo...why did I go for a 3s? Performance is now 'sparkling' in contrast to before, but the speed 400s (7.5 volt?) must be suffering the extra voltage-indeed, I've replace one that went duff already-so why don't I use a 2s instead? And save a bit more weight? Or get a bigger one, or two in parallel and get some decent flight times? And before you all start, going brushless is on my 'to do' list, but the major surgery involved-de-skinning the mainplane-means I'm in no rush-she flies just fine now and is hardly over-worked-3 or maybe 4 flights this year! Quote Link to comment Share on other sites More sharing options...
Olly P Posted November 13, 2009 Share Posted November 13, 2009 Yorkman - try it and see! If you will get enough performance and flight time out of a 2s then get one (or 4) and try it out! Quote Link to comment Share on other sites More sharing options...
Frank Skilbeck Posted November 13, 2009 Share Posted November 13, 2009 I did the same on my Twin Star and burnt out one of the original 400 motors. I've put a 4s A123 pack in my Twin Jet which has 480s in it and so far they've been OK. So rather than replace your 400s with 400s when they burn out, try a 480. Quote Link to comment Share on other sites More sharing options...
Yorkman Posted November 13, 2009 Author Share Posted November 13, 2009 Posted by Frank Skilbeck on 13/11/2009 14:37:45: So rather than replace your 400s with 400s when they burn out, try a 480. Except I'd have to change all four....or at least a pair! Will shortly have 2x2s lipo packs for the Mossie, so will trial fit in the York and do some thrust/taxi tests and see how she goes. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.