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Old Sep 14, 2012, 09:50 AM
Luck is my skill
queadlunnrau's Avatar
United States, WA, Redmond
Joined Jun 2009
1,218 Posts
I have both the Dynam and HK 1400mm Sbachs and they both are great. Personally if I could only get one I would choose the HK one hands down.

My Dynam is pretty nimble and performs everything i know and then some, but its the sloppy flat paint kinda bothers me. Even after spraying polycrilic its nowhere near as pretty as my HK one. Yes the HK one uses water decals on the wings and yes i have some bubbles, even more now due to heat, but wow it sure is pretty and is a crowd pleaser.

I'm glad i have both though. Seriously both planes combined is still cheaper than a Carbon-Z Yak. Hell they were each cheaper than a UMX Sbach!
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Old Sep 15, 2012, 01:37 AM
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rayonnair's Avatar
Singapore, Singapore
Joined Jun 2012
2,012 Posts
Re-build and re-maiden success! After spending last Sunday with some epoxy, microballoons, birch rods, gorilla glue, packing tape, new servos all around, a new 14x7 JXF wooden prop, and the jigsaw pieces of my Sbach, I got to re-maiden it today. I remembered to check the throws this time, and it was a big baby when I got it trimmed in.

I did spent the first 2 minutes in terror though as I constantly held in elevator and aileron to keep the bird flying. I think she may be nose heavy, I had 8 clicks of up elevator to keep her flying straight and hands-off at 50% throttle, and inverted flight required a fair amount of down elevator.

But WOW does this bird fly nice. My first aerobatic plane, so I didn't know what to expect and I didn't have a point of reference. Straight up, no hesitation. Get into trouble? Gun the throttle. Up/down orientation is easy to determine. Rolls are quite axial, and rudder has hardly any coupling. Stalls like a big baby, nose up and then nose down with wings level, and it takes quite a while to reach the stall from half throttle too. Did my first knife edge that could actually be called a knife edge, and it only needed some down elevator to keep it trim.

6-7 minutes of flight eats about 2500mah on the 4S that I bought. That's plenty of buffer for if/when I need to delay a landing.

I don't expect her to last very long as I practice on her. But pretty happy about what I got so far.
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Old Sep 15, 2012, 11:31 AM
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alex_007's Avatar
France, Pays de la Loire, Nantes
Joined Sep 2010
174 Posts
Quote:
Originally Posted by acesimmer View Post
I'm using all stock power system but with additional BEC.
Why ? That the BEC do more? otherwise can you show us your plane plz


Other question: is that the 2 lengths in red are identical? (btw servo's extremity and foarm) With the original servos.
click for zOom
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Last edited by alex_007; Sep 15, 2012 at 11:44 AM.
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Old Sep 15, 2012, 12:23 PM
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kmdunnster's Avatar
Long Beach, CA
Joined Mar 2010
1,067 Posts
Quote:
Originally Posted by alex_007;22740336
[B
Other question:[/B] is that the 2 lengths in red are identical? (btw servo's extremity and foarm) With the original servos.
Alex,
"btw servo's extremity and foarm"
Not sure what that means
Kevin
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Old Sep 15, 2012, 03:34 PM
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alex_007's Avatar
France, Pays de la Loire, Nantes
Joined Sep 2010
174 Posts
Quote:
Originally Posted by kmdunnster View Post
"btw servo's extremity and foarm"
Well, sorry ^^ I wanted to say "between the end of the servo and the foam". The 2 lengths in red what!
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Old Sep 16, 2012, 08:15 AM
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rayonnair's Avatar
Singapore, Singapore
Joined Jun 2012
2,012 Posts
Put 6 more packs through this baby today. So nice to fly! Have been slowly increasing the rates and getting a feel for the flying characteristics. Evening flight had a lot of wind that tipped one wing over on landing, causing a bounce and a cartwheel. Luckily, everything was fine.

I bought the 3000mah and 3300mah 25-50C nanotechs for this bird. I land after 7 mins. I temped the ESC and motor after landing - ~45-50 degrees C, not too bad.

I have, however, noticed that the batteries are all surprisingly warm to the touch. I thought I had plenty of buffer - with the 14x7 JXF prop I pull 68 amps on static WOT with a full charge, and this should be well within the C rating of the batteries. Can I get people's input on how warm their battery comes down after a flight?
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Old Sep 17, 2012, 09:24 AM
crack Spain
joselu's Avatar
Spain, Madrid, M
Joined Jun 2012
178 Posts
the famous aileron´s servos here, mark hitec , is necessary cut the epo?
And then, the hobbyking´s servos for rudder and elevator, are quickly?are good?, other recomendation?
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Old Sep 17, 2012, 11:31 PM
Scott
Australia, SA, Two Wells
Joined Feb 2012
216 Posts
Quote:
Originally Posted by rayonnair View Post
Put 6 more packs through this baby today. So nice to fly! Have been slowly increasing the rates and getting a feel for the flying characteristics. Evening flight had a lot of wind that tipped one wing over on landing, causing a bounce and a cartwheel. Luckily, everything was fine.

I bought the 3000mah and 3300mah 25-50C nanotechs for this bird. I land after 7 mins. I temped the ESC and motor after landing - ~45-50 degrees C, not too bad.

I have, however, noticed that the batteries are all surprisingly warm to the touch. I thought I had plenty of buffer - with the 14x7 JXF prop I pull 68 amps on static WOT with a full charge, and this should be well within the C rating of the batteries. Can I get people's input on how warm their battery comes down after a flight?
Doesn't surprise me that your batteries are hot. The 3000mah is just inside the recommended max sustained amp draw at 3000mahX25c = 75amps. Pulling 68amps would be a bit too close to comfort for me even being inside the limit. I pull 50amps on a 2200mah 45c nanotech (75amps rating) and it comes down pretty hot sometimes so I imagine yours would be cooking.
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Old Sep 17, 2012, 11:49 PM
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acesimmer's Avatar
United States, NV, Fernley
Joined Oct 2011
2,114 Posts
My max amp draw is 52 A downlinked to my Aurora 9 TX. I run Sky lips 3300 4S 30C and slightly warm. My ESC is max 98 deg F on a 95 degree day. Stock ESC, motor and prop. Servos all Hitec HS81
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Old Sep 19, 2012, 04:58 AM
crack Spain
joselu's Avatar
Spain, Madrid, M
Joined Jun 2012
178 Posts
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


hinges
http://www.hobbyking.com/hobbyking/s...idProduct=8280



-----
this list no finish yet
I need help for recomendation about motor, I think spoke only 46 turnigy motors and g36(very heavy), more information?
this night will finish, and need information landing , and the plastic of wheels and wheels,my english is bad(jeje)
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Last edited by joselu; Nov 27, 2012 at 06:23 AM.
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Old Sep 19, 2012, 05:11 AM
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rayonnair's Avatar
Singapore, Singapore
Joined Jun 2012
2,012 Posts
Thanks acesimmer, wigsw001. I have purchased a fatter ESC and some higher discharge batteries. We'll see how that goes.
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Old Sep 19, 2012, 06:43 AM
crack Spain
joselu's Avatar
Spain, Madrid, M
Joined Jun 2012
178 Posts
I looking for spinner:
http://www.hobbyking.com/hobbyking/s...0mm_Black.html


the diameter is 70mm, but i have a 5mm hole, and there aren´t with this size
How i can put?
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Old Sep 19, 2012, 06:51 AM
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rayonnair's Avatar
Singapore, Singapore
Joined Jun 2012
2,012 Posts
Quote:
Originally Posted by joselu View Post
I looking for prop adapter:
http://www.hobbyking.com/hobbyking/s...0mm_Black.html


the diameter is 70mm, but i have a 5mm hole, and there aren´t with this size
How i can put?
Did your stock spinner break? Just checking. If it didn't you can just use that!

The linked spinner has an 8mm mounting hole. Sometimes, spinners come with adaptors for use with different sized motor shafts. I can't see one on this one, so I do not believe it will fit the stock shaft, which is 6mm in diameter. If someone knows otherwise please correct me.

Dubro spinners have adaptors for use on different sized shafts. They are typically in imperial, not metric units, but seem to work out fine. I have bought one as a spare in case my current spinner self destructs.
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Old Sep 19, 2012, 06:59 AM
crack Spain
joselu's Avatar
Spain, Madrid, M
Joined Jun 2012
178 Posts
edit, I will buy dubro in ebay no?, thank rayonnair

http://www.duanesplanes.com.au/produ...?productid=972, here only 6mm hole adapt
The stock plane mount 5mm


Other question, my wheels pant broken, I think imposibble buy other
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Last edited by joselu; Sep 19, 2012 at 07:17 AM.
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Old Sep 19, 2012, 07:12 AM
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rayonnair's Avatar
Singapore, Singapore
Joined Jun 2012
2,012 Posts
I don't know of any online sellers of dubro products, sorry. Maybe find a dubro dealer near you.

My wheel pants broke on a crash, warping the plastic. I epoxied it back together and it is fine now. Epoxy is surprisingly strong. Depending on the kind of break you had, you may be able to epoxy it back together again also. As long as the connection between the wheels, the screw, and the metal landing gear itself is not broken, you should be OK to land without pants too.

It sounds like you had a crash? If so I feel for ya, I crashed mine on maiden, the entertaining video is at post no. 1150.
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