Albert Ace Posted June 28, 2023 Share Posted June 28, 2023 Going to fix up my artf PC9. Running on 4s. I have in my mind to buy the Overlander 900 kv 3548 thumped motor. Got one in an old bile and it runs well. Probably use their 60amp rec and a 12 by 6 prop. Is that alright, or is the 4Max set up (800kv) better ?? Albert Quote Link to comment Share on other sites More sharing options...
Albert Ace Posted June 28, 2023 Author Share Posted June 28, 2023 That's Thumper motor. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted June 28, 2023 Share Posted June 28, 2023 Is it the sea 103 one ?, I maidened mine with an old Laser .90 early this morning, more information if you want it. Quote Link to comment Share on other sites More sharing options...
Albert Ace Posted June 28, 2023 Author Share Posted June 28, 2023 No sir it's the 60 inch span Roulette one. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted June 28, 2023 Share Posted June 28, 2023 59 minutes ago, Albert Ace said: No sir it's the 60 inch span Roulette one. ? Picture please,,, Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted June 28, 2023 Share Posted June 28, 2023 Anyone out there with the rcm&e December 2010 with the seagull PC-9 review, I think that the balance point is too far forwards at 70mm. Quote Link to comment Share on other sites More sharing options...
Graham Bowers Posted June 28, 2023 Share Posted June 28, 2023 4 hours ago, Paul De Tourtoulon said: Anyone out there with the rcm&e December 2010 with the seagull PC-9 review, I think that the balance point is too far forwards at 70mm. Yes, I have it - it's about the 63 inch span version, not the Roulette. Quote Link to comment Share on other sites More sharing options...
Kim Taylor Posted June 28, 2023 Share Posted June 28, 2023 I haven't flown mine for a long time (long story) but iirc: I used a generic 4060 500kV motor, 6s 3000mAh LiPo, 60A esc, 13x8 prop. I went 6s because I already used them on other models, I'm sure it would fly on 4s on the right motor / prop. From memory, this showed somewhere between 700 - 750W input. At this, it's seems quite scale speed wise and is unlimited vertical. It's a bit porky - from memory 6 - 6.5lbs (partly my 6s setup, I know) so I wouldn't go with a lot less power. It likes to be going at a fair lick before it'll lift off, and it lands pretty hot, but once the wheels touch terra firma, it stays down and doesn't bounce. Generally a nice locked in flyer (and it's got a nice aerodynamic whistle on a fast fly by. My recollection is that the published c of g is conservative, but I'd have to put mine on the balance to find out for sure. hth Kim Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted June 29, 2023 Share Posted June 29, 2023 Thanks, Graham, It says to fly it with the c of g a bit further forwards, I have just done the opposite, I stuck 60 grams of lead in the tail 🤢 I will be trying it this morning, I got this after measuring it all out. Quote Link to comment Share on other sites More sharing options...
Graham Bowers Posted June 29, 2023 Share Posted June 29, 2023 (edited) 1 hour ago, Paul De Tourtoulon said: Thanks, Graham, It says to fly it with the c of g a bit further forwards, I have just done the opposite, I stuck 60 grams of lead in the tail 🤢 I will be trying it this morning, I got this after measuring it all out. Great, hope you get it to it fly to your liking. I tend take the instructions and / or calculated CoG position as a start point then adjust a little bit at a time based on how it flies, taking in to account the 45 degree climb - roll inverted test and general pitch performance. I pefer ever so slight slight positive stability. Edited June 29, 2023 by Graham Bowers Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted June 29, 2023 Share Posted June 29, 2023 Yes I also do a flight test whatever the c of g give you it's only a guide, no luck this morning the Laser .90 wouldn't start, sounds like a broken valve spring,,, Quote Link to comment Share on other sites More sharing options...
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