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Old Oct 12, 2012, 07:38 AM
timatworksg is offline
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I would add right thrust too. These small micro planes have a fast spinning prop and if you build it light, lotsa prop torque. The HH UMX planes have very obvious down and right thrust angles, so a little right is good. 21" may be a little big for the p51 gear,...unless you can get her to weigh approx the same as the UMX version. Otherwise, 17-18" with a little wider on the wing and elevator chords perhaps? But of your going profile, 21" may just work out well. Keep it light and use glue where needed. Don't overglue...lol. When I started building I always overdid it. Then thru time, all those places I overdid, never really needed any...haha!

Best of luck! And report back! On a side note, my Sbach is still around and perfect for a slow sporty flight when 3D isn't in the mood. Tho she can 3D, I just love watching her fly patterns with those destictive colors!!
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Old Oct 15, 2012, 07:32 PM
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I did re-size to a 17" half was just too small.I am gonna go on and do a big one too.Just gotta get the electronics.Re sizing was an adventure I did it by accident on this.I found a set of old plans for a balsa Storch; well 39 pages later I got plans to build one as big or bigger than the cover plane on RC Airplane.....Needless to say that one won't be built in the foreseeable future.I did get one the right size this morning and I think I have it figured out now for repeatable success.
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Old Sep 29, 2014, 01:54 PM
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Hey how are the wings glued together?
on the pics I see a kf profile but the plans just show 2 wings glued together.
and wheres the battery door or where is it placed?

maybe some other things I need to know.

thanks already!
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Old Sep 29, 2014, 03:45 PM
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Quote:
Originally Posted by BASTHEBEAR View Post
Hey how are the wings glued together?
on the pics I see a kf profile but the plans just show 2 wings glued together.
and wheres the battery door or where is it placed?

maybe some other things I need to know.

thanks already!
the kf wing is an easy addition most of us here just made the top and bottom piece about 1/4 inch past the spar when measuring from the leading edge. you can then simply notch out the side fuse panels at the thickness of the added foam.
the top fuse nose piece is often used as the battery door so from the canopy to the nose is where the battery should end up.
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Old Sep 29, 2014, 09:34 PM
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Wheeee! So glad to see this thread again. I was just cleaning my garage the other day, trying to make room for more planes because I just don't have enough.

Room... not planes. Well... yes, planes! This plane! I need a new, bigger one. Something that can handle a 3S 1000. Oh yes... we're talking 36" or bigger wing. Woohoo!

I have a lot of foam.

sooo much foam....
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Old Oct 09, 2014, 04:47 PM
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Hey,

Why does the 20" version have a double kf profile and the 30" version just a single plate?
And where are the right electronics listed for both planes?
Is there any difference in flight on the both?

Thanks !
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Old Sep 16, 2015, 09:21 AM
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Sorry for bringing up this old Thread! But I am thinking of building the sbach!
I'd like to use my D2822/14 with 1400kv on a 3S1300 Setup (I got the batteries from my quadcopter, so I'd like to use them!) eCalc tells my something about a 8x4,3 with 684g thrust, and 70km/h pitch.

What I don't know: Does the Sbach fit to my specs? Which size should I build?
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Old Sep 16, 2015, 10:53 AM
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That should be just fine. I used a 2822 1200kv on the 30" version with unlimited vertical on a 9" prop so you should be right about the same. Your setup will have a little more speed but should be great.
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Old Sep 17, 2015, 12:38 AM
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Thanks! Whats the weight I should calculate for the whole setup? Just for knowing the Thrust/Weight ratio?

I ordered some NTM Prop Drive 28-26 with 1000kv and could run:

10x5 - 678g Thrust and 53pitch
9x7,5 - 535g Thrust and 75kmh pitch
9x4,5 - 544g thrust and 53kmh pitch (and sic 8min runtime!)

If theres any chance I'd like to use this motor for the sbach, because the Turnigy D2822 suits my Depron Corsair (there is a thread in here somewhere) way better (I think ;D)

What do you recommend?
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Last edited by man1ac; Sep 17, 2015 at 12:59 AM.
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