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Dec 24, 2015, 10:53 PM
U down with EPP? Ya u know me!
Aerogance's Avatar
Thread OP
Build Log

Tweety JW (JW30)


**now available at http://www.jwglider.com**

I love tweety planes and have been threatening to build a tweety-size JW for a while now. Tonight I took the first step and cut some tweety cores! I mocked up a plane using Mini JW parts. James and I think it should come in right around 0.54 lb AUW and have a service ceiling of 399 ft AGL One small step for man, one giant leap for tweety kind:
Last edited by Aerogance; Mar 17, 2016 at 04:04 PM.
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Dec 25, 2015, 12:42 AM
Objects in mirror are losing
1000MPH's Avatar
I want a DS pro version. Don't worry I'll register it with the FAA and release you of all responsibilities.
Dec 25, 2015, 03:44 AM
Remember... Fly for fun!
ALEX HEWSON's Avatar
I want!
Dec 25, 2015, 02:08 PM
Where is the inspiration
wdeighton's Avatar
surly max size of a tweety is something that starts with twenty? or am I missing something?

Apart from that it looks interesting. What size servos fit in?

Knowing the JW section I would guess 11mm?
Dec 25, 2015, 03:54 PM
U down with EPP? Ya u know me!
Aerogance's Avatar
Thread OP
No idea on servo size but I plan to use something like a 65MG.
Dec 25, 2015, 03:57 PM
U down with EPP? Ya u know me!
Aerogance's Avatar
Thread OP
Wing beds are joined. Wing halves are joined. Spar installed and filled with white gorilla glue. Tips rounded. Modified a Mini fuse and tail for a bench fly:
Dec 25, 2015, 05:15 PM
Remember... Fly for fun!
ALEX HEWSON's Avatar
You got to work out an Australasian distributor Aaron. Really love the jw
Dec 28, 2015, 09:25 PM
U down with EPP? Ya u know me!
Aerogance's Avatar
Thread OP
Quote:
Originally Posted by ALEX HEWSON
You got to work out an Australasian distributor Aaron. Really love the jw
If you know of one that is reputable, I will get in touch with them.
Dec 28, 2015, 09:30 PM
U down with EPP? Ya u know me!
Aerogance's Avatar
Thread OP
Finished the CNC program for the Tweety fuselage and got the first one cut out of 1.9 lb EPP. It looks mean and fast in person!
Dec 29, 2015, 03:49 PM
U down with EPP? Ya u know me!
Aerogance's Avatar
Thread OP
I was going to make an ultralight Tweety JW, but since we are about to go into the spring windy season I have changed gears and instead will be building the plane heavy. To this end, I have added basswood trailing edge stock to the wing cores and will ultimately cover the wing in 10 mil DI.

I have also shaped the fuselage and spackled both the fuselage and wing 1 coat. Planning on 3 spackle coats total and will probably 77 rather than thin goop the foam after spackling.

I think a 65mg will fit in the wing with ease, but I am considering something slightly thinner that is of similar speed / tightness / quality. But alas such a servo may not exist...
Dec 30, 2015, 12:16 AM
U down with EPP? Ya u know me!
Aerogance's Avatar
Thread OP
Fuse is rounded and spackled. Wing tips are rounded and reinforced with white gorilla glue. Wing is spackled. Basswood drag spar installed (before spackle of course). Balsa tail built. Photos:
Dec 30, 2015, 08:15 AM
Objects in mirror are losing
1000MPH's Avatar
I want.
Dec 30, 2015, 12:47 PM
Where is the inspiration
wdeighton's Avatar
bench mark

Hitec HS65-HB Servo
Torque 4.8/6.0v: 25 / 31 oz 1.8 / 2.2 kg.
Speed 4.8/6.0v : 0.14 / 0.11 second
Size : .9'x .5'x .9' 24 x 12 x 24mm
Weight : .39oz. 11.2 g.

KST X08N V3 HV
8mm thick(So much thinner), and 2.6 Kg.cm

MKSDS6100
10mm thick, so still thinner, 3.3 Kg.cm

These 3 Blue Bird servos also look like they could do the trick.
ranging from 10mm to 13mm thick with torques from 4.8 Kg/cm to 8,6 Kg/cm
Dec 30, 2015, 01:07 PM
U down with EPP? Ya u know me!
Aerogance's Avatar
Thread OP
Thanks Will. I know the MKS have a much tighter drivetrain and centering than the 65MGs so I could go with those and call it a day. But I will research the KST and blue bird ones. Main concern on a small and fast plank is gear and bearing slop, since a small amount of slop can make a huge impact on control.
Jan 01, 2016, 02:03 PM
Registered User
I have used kst 215mg's in all of my jw's and been well pleased. They are a little thick, 12mm. They are very fast and have held up great for me.


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