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Old 01-01-2003 | 04:20 PM
  #9  
Demon
 
Joined: Apr 2002
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From: SE, CT CT
Default Re: aileron stock?

"I notice you use balsa for the TE except the center, why the dowl in the middle? I was going to use balsa for the whole TE."

The dowel TE is for rubber band chrush protection. I used 1/4" balsa TEs before, and the balsa eventually fails, crushing th aft 2" - 3" of the wing. I also tried using 1/4" dowels from the center to just outboard of the torque rod bearing, but that failed at the dowel/balsa joint. Using a 1/4" dowel from the center out to the location of the first CA hinge results in a TE that does not crush at all without much of a weight penaly.

"What size aileron stock do you use, and where do you get it?"

For 'regular', straight strip ailerons (such as the Zero, P-51 and Fw-190), I use 1" x 1/4" aileron stock from Tower Hobbies (because I buy stuff like that en mass). Any local shop should also have it.

For the curved ailerons on the P-47, I use 3/16" sheet balsa cut to the shape required using the kit aileron as a pattern and extending the root lines to get the desired span. You could sand the 3/16" sheet to a point at its TE, but I just round off the rear edge and leave it flat.

"I noticed that the instructions for the P-47 wing don't result in a wing that is 1/12+10%, it's closer to 5%. Do you cut the wing a bit longer to get the extra span and area?"

The P-47D's span at 1/12th +10% is 44 13/16". The P-47N's span at 1/12th +10% is 46 3/4".

The kit provides enough material on the wing panels to cut the panels to any size from exacly 1/12th to +10% for any version of the Jug.

On my first Jug (the Razor Back P-47D in my RCCA site signiture), I built it to 40.5" (1/12th). On my latest, I went with the P-47N with a span of 46.75". The 'new'one is just being finished and I haven't flown it yet, so I can't comment on the difference in flight performance yet. I should have it flown within the next week or so (depending on the weather).

"But I was wondering about the wing chord. I assume it's also at 1/12+5%, but I haven't found numbers for the fullscale P-47N wing chord so I can't be sure of my measurments. What did you do for the wing size?"

The measurment I have from a factory 3-view is 9' 2 1/32" for the P-47N's overall root chord. That translates to about 10" @ +10% (including ailerons). The drawing for the wingtip supplied with the kit is perfect for the tip dimentions and shape.

HTH,
D