Steve Hargreaves - Moderator Posted April 25, 2013 Share Posted April 25, 2013 Not a light model then Andy....5.6kg is pretty chunky!! I wonder if a 180 4 stroke might go well in this..... Curses.....I'd more or less decided on a Seagull Yak as my next project....I might have to get one of these instead now!!!! A touch of aileron differential works very well on the Pitts too Andy.....it really helps keep the nose pointing in the right direction. Make sure you dial some in.... Quote Link to comment Share on other sites More sharing options...
Turbycat Posted April 25, 2013 Author Share Posted April 25, 2013 I think a 180 4 stroke should be ok Steve. I only put the ST G2300 in cos I had one! Funnily enough that was in a Seagull Yak last year. Until I knocked the undercarriage out which basically ripped the bottom of the fuselage out. The Yak flew really well but I prefer this Pitts. I fly it most of the time on 1/3 to 1/2 throttle and it'll still do big loops from level flight. When you open the taps it certainly moves and uses up a lot of sky. I'm gradually exploring the handling. Had a few more flights this morning before the breeze got too gusty! I'll check the weight. That was on the bathroom scales so may not be too accurate. I'll check it with kitchen ones!!! The engine and muffler come in at just over a kilo ,I think, and I did put a large sub c battery pack in it too! That weight is ready to go. Probably had 1/2 tank of fuel left in it too. Andy Quote Link to comment Share on other sites More sharing options...
Turbycat Posted April 25, 2013 Author Share Posted April 25, 2013 Yup quick check is 5.6 kg. It is quite weighty but it flys beautifully. For a Pitts it seems very stable. It has plenty of authority in the air and was not tossed around by the gusty conditions we had today. Andy Quote Link to comment Share on other sites More sharing options...
Newbee phil Posted August 28, 2014 Share Posted August 28, 2014 Can anyone help me out with mine ..... I'm using a os120fx and mine is ridiculously tail heavy ... also I've read on other threads about the cg in the manual being wrong and to go 80mm from the top leading edge? .. any help would be greatly appreciated ...... Quote Link to comment Share on other sites More sharing options...
Newbee phil Posted August 29, 2014 Share Posted August 29, 2014 Bump Quote Link to comment Share on other sites More sharing options...
Pete B Posted August 29, 2014 Share Posted August 29, 2014 Hi Phil, Turbycat hasn't posted on the forum since back in January so he may not be looking in. I see that in his post of 23/4/13 he set the CG and throws to the manual recommendations and he didn't report any problems. No experience of the model so can't help with tail-heavy issue... Pete Quote Link to comment Share on other sites More sharing options...
Jez Harris 1 Posted August 29, 2014 Share Posted August 29, 2014 The ST 2300 with a pitts muffler is quite a bit heavier than a 120 fs so you will need to add weight. PC also used a big Sub C battery pack up the front so I expect more weight unless you also have a similar pack. Jez Quote Link to comment Share on other sites More sharing options...
Jez Harris 1 Posted August 29, 2014 Share Posted August 29, 2014 A quick google gives the OS 120fx as 822grammes with silencer The ST2300 with a BCM weighs 1040Grammes so there's 220 Grammes you need - approx. 1/2 lb of lead. Jez Quote Link to comment Share on other sites More sharing options...
Newbee phil Posted August 31, 2014 Share Posted August 31, 2014 Cheers guys I would rather leave weight out .. I mean would you guys be happy to put so much weight in? ... I'm thinking of packing out the engine mount with some ply to bring the engine as far forward as possible. .. because at the minute as it stands, even with my 5 cell pack as far forward as possible , it needs 800 grams of lead!!! Surely that's to much weight if you get a deas stick etc .... Edited By Pete B - Moderator on 31/08/2014 16:52:48 Quote Link to comment Share on other sites More sharing options...
Jez Harris 1 Posted August 31, 2014 Share Posted August 31, 2014 Phil, Having a dead stick with a correctly balanced model is no issue at all. The best way to avoid ballast is to do what Turbycat did and simply fit a bigger engine! I dont see why you need 800g of ballast though when you look at the comparison between the 120 fx and the ST 3200. where are the servos for the tail end? - are they at the back of the fus near the moving surfaces or are they mounted in the front of the fus? Jez Quote Link to comment Share on other sites More sharing options...
Newbee phil Posted August 31, 2014 Share Posted August 31, 2014 Jez the servos are mounted mid fus all in the servo tray ...... Quote Link to comment Share on other sites More sharing options...
Jez Harris 1 Posted August 31, 2014 Share Posted August 31, 2014 Can you move them further forwards? Jez Quote Link to comment Share on other sites More sharing options...
Newbee phil Posted September 7, 2014 Share Posted September 7, 2014 Right .... I've just acquired a asp180 .... so im hoping that should sort out the c of g ...... and not much weight will be needed .... lol ... fun and games!! Quote Link to comment Share on other sites More sharing options...
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