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Old Oct 09, 2005, 03:05 AM
Registered User
Australia
Joined Mar 2004
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hitec

Would hs 81s be enough in A mini Graphite, on a b50 7s setup? 10-14 cells.

Im thinking its pushing it, any opinions?

thanks
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Last edited by Philpops; Oct 09, 2005 at 08:44 AM.
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Old Oct 09, 2005, 04:34 AM
tic
thunderscreech
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New Cumberland, PA. US
Joined Dec 2000
10,936 Posts
they would probably be fine IMHO..
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Old Oct 09, 2005, 08:34 AM
BiggerBetterFasterMORE!!!
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Atlanta Hartsfield, Georgia, United States
Joined Apr 2002
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I'd second that. the really small JR241's are used in Ailerons in F5B, as well as the diamond D60. so an 81 is plenty. I used them on a very fast Bandit. If you're worried, spend a little more, and get some 125s. A well known Rocketworm on this board runs D60s all around, flaps, ailerons, everything.

~~fred
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Old Oct 09, 2005, 08:37 AM
RIP Ric
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Marietta, GA
Joined Jun 1999
43,312 Posts
I'd use MG on flaps, otherwise you might end up with broken gears if a flap catches in the grass.
..a
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Old Oct 09, 2005, 08:44 AM
Registered User
Australia
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thats the only thing im really worried about, striping gears. what do you think about hs 85bbs on the flaps, and Jr 331s for Ailerons?
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Old Oct 09, 2005, 08:47 AM
RIP Ric
Andy W's Avatar
Marietta, GA
Joined Jun 1999
43,312 Posts
No, the BB's still have nylon gears. I personally use HS85BB's on ailerons in my hotliners or larger sailplanes, but only metal gears on flaps (with a plastic snap-clevis on one end of the linkage)..
..a
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Old Oct 09, 2005, 09:41 AM
tic
thunderscreech
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New Cumberland, PA. US
Joined Dec 2000
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Yep, and I'd definetly second the idea of using HS-81 MG'S!!!!... Even on the ailerons. When you price an 81 MG, it's tempting to just go ahead and get the HS-125's...
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Old Oct 09, 2005, 11:06 AM
Toy Flyer
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Flying Field, Work Bench
Joined Mar 2004
612 Posts
I have 6 HS81's in my Mini Graphite slope toy, and they work great.

Lots of lift, Glover
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Old Oct 09, 2005, 03:48 PM
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Kyri's Avatar
England
Joined May 2000
1,486 Posts
I used HS81's for a while in a Twister (F5B plane).

I eventually stripped one of them in a hard landing and replaced the gears with metal ones. However I wish I'd have put the MG servo in at the start because I had to cut the wing to get the servo out.
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Old Oct 09, 2005, 03:50 PM
sloping addict
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France
Joined Feb 2003
1,536 Posts
Hi, I'd be the one to have 6 Dymond D60 on Raketenwurm, they withstood one major crash (behind trees, could not see the plane) with just one stripped gearset and busted fuse, and otherwise I ran about 50 packs with typically 30'+ per pack and about 3-4 landings per pack (that would be a good 150 landings) and never stripped one. The grass is just average.
I have much improved my landing skills though, coming in slow with full flaps, and there is a landing pin that helps a lot (almost no sliding).

My advice then: use whatever servo that have been mentioned, nylon is actually fine (although I use exclusively metal for larger planes), but then install a landing pin (3 mm diam / 15 mm long steel pin), if you land on grass.

If you want really good and small/light metal servos then get Futaba S3150. They're the best to date at less than 13mm thick (used in 3m F3B also = most brutal application there is...), digital also, and cheaper than Graupner DS368.
Hitecs are powerful but the metal geartrain is not too good, unfortunately.
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