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MikeR66
04-03-2006, 04:24 AM
I picked up a Quaker at my clubs swap meet ( 66" span, 2lbs 5oz "dry" weight without servos, motor/gearbox/prop, esc, reciever,and batteries.) I do not want to dump a fortune into it ( if I must I will ). I have everything minus motor/gearbox esc and batteries. I thought of trying Graupner 7.2v speed 600 with there Olympus 2.33:1 belt drive gearbox. As for a battery pack 8 cell sub c's sound ok over 2000 mah???

Bottom line......if anyone has electrified a plane like this with a 2lb 5oz weight empty what would be a good power load for it???

TY

Mike

airplanesbigdog
04-04-2006, 07:36 AM
Mike,
I have a 72" Sunduster oldtimer finished in silk and dope. It is powered by a geared Astro 05 swinging an 11X6 prop on a 2300 7 cell pack. It flies with plenty of power authority. Your idea should work out just fine but the Astro brushed motors can be found at reasonable prices with so many folks going to brushless and they are still a powerhouse.
I think everyone needs an oldtimer to kick back on relax while flying for a change of pace. Good luck with yours.
Larry Enger

MikeR66
04-07-2006, 04:43 AM
Thanks Larry, I will give it try with my motor/gearbox and a 7 cell pack.

Mike R

Milton
10-17-2006, 05:38 AM
A few years back I had a 86 or 87" quaker flying with a OS 25 four stroke and it had plenty of power, I thought for a year now about biulding a 96" electric now the bug has hit me again.

Milton

tchant
09-27-2007, 06:30 PM
I have converted a larger version 80" playboy ,but a small out runner would work great try united hobbies and if you can figure out what you need you can save lots of cash.

RogerQ
10-06-2007, 01:47 PM
had a Quaker some time ago: the big, big one. What a great plane: it flew ever so easily, and would slow down to a crawl, and even pick up a thermal if I looked for one. Sold it to a friend, five or six years ago: he has never flown it, but just had to have it. I got another kit from Penn Valley Models. Will build it this winter. Have fun with yours. RogerQ

E-Challenged
10-14-2007, 04:48 AM
I would use about a 150 watt low-KV brushless outrunner and a 2000 mah 3S Lipo pack with maybe an 11x5 direct drive type prop. The brushed 400 in a Mini Oly gearbox and 9x5 Graupner "slimprop" would have barely enough power given the weight and drag. You will probably have to locate the battery pack well forward and add weight to the nose to get the cg right with brushless and lipo power. A heavier 9-cell NiMh pack might be better than lipo to get the cg right without lead depending on how tail heavy the model turns out to be.

mred
03-15-2008, 11:40 PM
BP Hobbies carries good brushless motors and they are cheap too. Fast service and they run great. I have two of them and both are still running very good. They have all ranges of motors and you should be able to get just about anything you need and a lot faster then shipping from Hong Knog. I buy from Hobby City too, but I try and get it here first.
Ed