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Old Sep 28, 2012, 12:16 PM
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rayonnair's Avatar
Singapore, Singapore
Joined Jun 2012
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Alex, I don't know about the wingtip twist.

The wheel pants are OK and have survived 15 of my amateur landings on bumpy grass. They have a tendency to pop open and misalign on bad landings, but you can pop them right back.

Incidentally, has anyone noticed this weird bubbling going on in the cockpit? I think the heat of the sun expanded the foam and now the foam in the cockpit looks like diseased skin! Or maybe bad leather. Or crocodile skin. Luckily the other surfaces seem OK. Maybe the canopy acted as a lens / heat trapper and the insides baked...? Anything I can do to fix it?
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Old Sep 28, 2012, 12:53 PM
Luck is my skill
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Joined Jun 2009
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Quote:
Originally Posted by rayonnair View Post
Alex, I don't know about the wingtip twist.

The wheel pants are OK and have survived 15 of my amateur landings on bumpy grass. They have a tendency to pop open and misalign on bad landings, but you can pop them right back.

Incidentally, has anyone noticed this weird bubbling going on in the cockpit? I think the heat of the sun expanded the foam and now the foam in the cockpit looks like diseased skin! Or maybe bad leather. Or crocodile skin. Luckily the other surfaces seem OK. Maybe the canopy acted as a lens / heat trapper and the insides baked...? Anything I can do to fix it?
Yeah this bird has a good thick coat of black paint (even under the water decals on the wings) which loves to absorb the heat from the sun, add the clear canopy magnifying and trapping heat = gator skin.

The only thing I can think of, is to gator skin the whole plane up, I mean if dimples make a golfball fly further, maybe gator skin will make our planes roll better?
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Old Sep 28, 2012, 02:18 PM
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United States, NV, Fernley
Joined Oct 2011
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Cockpit bubbling... Hell, mine melted. I now drill a small hole in all my canopies to let the heat escape. My T28 composite version will have a vacuformed interior to stop the melt down.
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Old Sep 30, 2012, 09:28 AM
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Joined Nov 2011
86 Posts
[QUOTE=joselu;22773300]I read this post for 2 days , looking for information of servos, spinner , motor
I think is important tht all information is a list:

CG:





SERVOS:
ailerons:
hitec hs-82(metal gear)
http://www.hobbyking.com/hobbyking/s...idProduct=9814


hextronic mg-14 8,29$
http://www.hobbyking.com/hobbyking/s...dProduct=22929


hitec hs-65(metal gear) 26,21$
http://www.hobbyking.com/hobbyking/s...g_0_14sec.html



Rudder & elevator:
hxt(metal gear) 7,97$:
http://www.hobbyking.com/hobbyking/s...0kg_16sec.html


hobbyking:6,11$
http://www.hobbyking.com/hobbyking/s...dProduct=16266



Adapter prop(the size adapter is 70mm)

how put the stock adapter prop?


http://www.rcgroups.com/forums/showthread.php?t=1573216&page=75



The push rods are 1,5mm



Props

user teknokraze in post 421(
http://www.rcgroups.com/forums/showt...page=29Picking )

props is tough, not only do you need to figure out which diameter/pitch works well, but not all props are created equal either. Did a little test just now, take note of the attached image below.)

Note: I have a Turnigy 4258-800kv motor mounted in place of the original so not sure what difference in efficiency might be there so your results may be different. This test is just to show the difference between like diameter/pitch props and their style/materials in manufacturing.

Stock Propeller:

Unknown Make 13x8 (weight - 30g)
Draw: 74A - 1110w - 6.7lb (3041g) Thrust

14x7 Test:

APC-E 14x7 (weight - 30g)
Draw: 70A - 1007w - 7.1lb (3223g) Thrust

Master Airscrew Electric Only 13x8.5 (weight - 32g)
Draw: 86A - 1187w - 8lb (3632g) Thrust
**(Correction, the Master Airscrew I tested is a 13x8.5 - Sorry for the erroneous info)**

TGS Sport 14x7E (weight 45g)
Draw: 74A - 1090w - 6.8lb (3087g) Thrust

JM APC Style 14x7 (non-electric, weight 70g)
Draw: 79A - 1153w - 8.5lb (3859g) Thrust

Didn't have a wood propeller to test, wish I would have as I think they have a high efficiency to weight ratio.(the stock size is a 13,8
whit stock motor people put to 14 ,8)


APC prop.1,5$:
http://www.hobbyking.com/hobbyking/s...idProduct=5442


Master 13*8 3,79$

http://www.hobbyking.com/hobbyking/s...idProduct=8059


Tgs sport 13*7(3,57$):
http://www.hobbyking.com/hobbyking/s...idProduct=7966




Turnigy Ultra-light wood propeller 14*8(3,56$):
http://www.hobbyking.com/hobbyking/s...ller_14x8.html



Turnigy Ultra-light wood propeller 13*8(2,98$):





Canopy lock(essencial for this model)6,44$):

http://www.hobbyking.com/hobbyking/s...0pcs_bag_.html



Motors:

img of stock motor (derivated to right, is normal):


turnigy g46(46$):

http://www.hobbyking.com/hobbyking/s..._46_Glow_.html




esc
turnigy plush 80 (40$):
the rating is very bad, but you can see an opinion user


http://www.rcgroups.com/forums/showt...573216&page=69


Pilots
4,5$:
http://www.hobbyking.com/hobbyking/s...3819&aff=81777


Alloy Adjustable Horn (2,95$):
http://www.hobbyking.com/hobbyking/s...idProduct=4328



http://www.rcgroups.com/forums/showpost.php?p=20657324&postcount=62


Calculator:
http://www.rcgroups.com/forums/showp...8&postcount=98

Instructions for programing the stock variador:
http://www.rcgroups.com/forums/showt...573216&page=21
*note*, the stock conection variator is :hxt 4mm
somebody have a 70 esc and other have a 80esc




GREAT INFO!! THX A LOT!

Anybody try 3 blade props?
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Old Oct 01, 2012, 08:21 PM
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Joined Jul 2010
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Just maidened my orange one yesterday, what a nice flying bird. Set my dual rates for 40% but had to up the ailerons to 50 and will probably take that up to 70% by the time it's all done. Had a slight problem with one of the axle nuts coming loose and pushing the left wheel into the outside pant half effectively welding itself solid. But after a little muscle I was able to free it and turned the axle bolt backward to carry on the rest of the afternoon. Thanks to everyone for this thread as it really locked me in on my decision to get this plane over the mx-2 even though I think the mx-2 would be easier on my tired old eyes to see. Because of the bad reports on it and the many successes I read here, it was easy to make the final decision, this being my first acrobatic style plane.
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Old Oct 01, 2012, 09:07 PM
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rayonnair's Avatar
Singapore, Singapore
Joined Jun 2012
1,422 Posts
Grats shiprex. I had the same problem with one of the wheels, it's the direction in which the wheel rotates that tends to unscrew that side only, I put up a bit of loctite and screwed it back on and it's been smooth since.
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Old Oct 01, 2012, 10:33 PM
Scott
Australia, SA, Two Wells
Joined Feb 2012
211 Posts
Maidened the sbach on the weekend in less than favorable conditions (quite windy) but I couldn't resist.

Used a turnigy 4000mah 4s with controls at 50-60%. It was a bit hairy on take off as I was taking off from a road and it pulled to the left and was heading for a big drain but I thought if I gunned it I should take off before hitting. Luckily I was correct. Flew beautifully with a little adjustment, however it wasn't as quick as I was expecting but still plenty fast. Only problem was on landing as I land in a paddock I bent one of the front landing gears a little as it is very rough. I was trying to stall it and land vertically but I still had a little speed so was a bit rough.

Great plane though. Must try some more aerobatics on the next flight.
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Old Oct 04, 2012, 10:49 AM
Pro RC Boneyard Developer
Canada, BC, Arrow Creek
Joined Jan 2012
177 Posts
Prop Adapter

Finally and much needed I'm sure, HobbyKing is finally supplying the stock prop adapter for the Sbach and MX2 they sell:

Hope you find this useful!

Regards...
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Last edited by teknokraze; Oct 04, 2012 at 10:54 AM.
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Old Oct 05, 2012, 04:54 AM
Scott
Australia, SA, Two Wells
Joined Feb 2012
211 Posts
Pity they don't stock any other spares for the sbach.
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Old Oct 05, 2012, 08:02 AM
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rayonnair's Avatar
Singapore, Singapore
Joined Jun 2012
1,422 Posts
Quote:
Originally Posted by wigsw001 View Post
Pity they don't stock any other spares for the sbach.
+1, I'd really like a set of replacement parts for this bird.
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Old Oct 05, 2012, 08:23 AM
Scott
Australia, SA, Two Wells
Joined Feb 2012
211 Posts
Quote:
Originally Posted by rayonnair View Post
+1, I'd really like a set of replacement parts for this bird.
Yeah they have everything for the mx2 but nothing for the sbach!
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Old Oct 06, 2012, 12:57 AM
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rayonnair's Avatar
Singapore, Singapore
Joined Jun 2012
1,422 Posts
Wanted to share some small mods I made

Mod 1: relocate elevator servo and increase elevator throw.

I cut a slot into the fuse as pictured below. The inside of that part of the fuse is actually hollow, with plenty of space for extra wiring. I considered making this a two servo setup, but thought it was overkill for something that is not supposed to be a "true" 3D machine.

I also glued a CF spar into the two halves of the elevator itself to help for torsional rigidity, and re-hinged the entire assembly with new robarts hinges, because it came from the factory misaligned.

Mod 2: New 2.75" wheels.

These fit, almost exactly, into the existing wheel pants. "SkyLite" brand (no idea where that came from, only bought it because the dubro 2.75" wheels were out of stock at the LHS). I changed these out because the old wheels would get deformed if you let the plane sit on the ground for a while. The downside is I will lose the nice shock absorbing effect of the old sponge wheels.

Mod 3: CF tubes into the wings where they mount to the fuse.

As you guys know, the wings are held down with a wooden plate that screws into the bottom. The holes in the wings that the screws fit through are rather large and I could see the foam bending under the stresses of flying. So I inserted appropriately sized CF tubes to reinforce that area.

Miscellaneous setup changes: changed the ESC to a turnigy plush 80A (I was drawing 68A on static WOT and the stock ESC is 70A). On the plus side, the plush is lighter than the stock ESC due to no heat sink.

I also stuck some foam onto the battery tray to get the CG where I wanted it.
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Old Oct 06, 2012, 01:13 AM
Dixie Normious
Eastcoast78's Avatar
Can A da....Ehh!!
Joined May 2010
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nice mods, i still have mine, haven't flown it in along time..still for sale to, but only low ballers..like ill give ya $100 for it... $225 is not to much to ask for it i don't think considering the hop ups ive down etc and i was willing to add a 2650mah 4s and the 3 14x8 turnigy wood props i have.(which are great btw) perfectly balanced which really surprised me.

i think i'm going to take her to the park Sunday for a few flights...;0)

That is really cool that they have the replacement prop adaptor. but jsut be reading the few reviews...buyer beware...like anything i guess
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Last edited by Eastcoast78; Oct 06, 2012 at 01:20 AM.
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Old Oct 06, 2012, 08:21 AM
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United States, NV, Fernley
Joined Oct 2011
1,791 Posts
I'm going to try 5S 4000. 40C this week. Static full power draws 55 amps. I have telemetry so will log inflight power and esc temps. Everything is stock except aluminum spinner.
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Old Oct 06, 2012, 03:51 PM
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Joined Dec 2006
818 Posts
I pulled my power 46 motor out of mine as mine has 180 flights on it and put the motor back in my h9 b25 so the only other motor I had spare was the 500 kv out of an old fms t28 which I have retired after 250 flights
First off I tried her on 5s 3700 but she was really lacking any punch so next I took out a bit more foam between the wings right back to the wing mount plate so that I could fit in a 6s 5000 lipo and put a 15/8 on her
To be honest she is flying the best she ever has
Have had over 20 flights in this config and harriers are more controlled all but eliminated any wing rock I had due to being tail heavy flat inverted flat spins are now flat
She is not fast but I never have my aerobatics fly like rocket sleds but she has true unlimited vertical as she just keeps climbing out and with a GPS tracker the other day I took off then went vertical and recorded at height of 1103 feet before I thought I was too high and put her into an inverted flat spin
She is no 3d plane but I never thought she was and now I can even get her to hang off the prop for a few seconds
Best part is I now fly for 10 min every flight with plenty for reserve
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