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Old Jul 19, 2012, 11:48 PM
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p901P901's Avatar
United States, CA, Lancaster
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Just trial fitting wings and tail. Foam for wings is 2lb EPS. Never used this stuff but these wings are strong. Wings will be removable with 1/2" joiner tube extending from the body and 10" long slip fit tubes into the wings (2ea per wing). Spars? Maybe just some 1" wide unidirectional 3.6 oz carbon tape.
Total wing area is 1221 sq inch and 527 sq inch for the body. Wing loading is 22 oz for wings only (15 oz with the body) if the projected RTF weight is 12lbs.So just epoxy/ glassing the wings with 3.6 oz cloth may be good enough.
Still allot of shaping, sanding and filling to go.
See Ya
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Last edited by p901P901; Jul 20, 2012 at 01:03 AM.
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Old Jul 20, 2012, 06:41 AM
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Waltjg's Avatar
Crystal River Fl.
Joined Jul 2008
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P, you referred to a 1/2" wing joiner tube in your last post, is this 2pieces one extending from each side into the wing or is it one piece going through the fuse and intake duct work? W
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Old Jul 20, 2012, 11:01 AM
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United States, CA, Lancaster
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Quote:
Originally Posted by Waltjg View Post
P, you referred to a 1/2" wing joiner tube in your last post, is this 2pieces one extending from each side into the wing or is it one piece going through the fuse and intake duct work? W
Not going through the duct work. Its going into a horizontal 1/4" birch ply former that is capped with 2 ea 1/4" vertical birch ply over the stub.
Stub spars are 1/2" OD .063 wall aluminum 6061 T6. Receiver spars are 1/2" ID brass tube. I did not calculate the shear loading on the spar at the attachment point between the fuselage and wing. Its only a guess .
Suggestions for glassing is horizontal orientation for to and bias for the bottom 3.6 oz cloth.
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Last edited by p901P901; Jul 23, 2012 at 06:48 PM.
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Old Sep 02, 2012, 10:10 PM
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United States, CA, Lancaster
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Paint

Painted the top. Next is the bottom, intakes and flight controls.
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Old Sep 03, 2012, 12:39 AM
DELTAS RULE
corsair nut's Avatar
tehachapi, CA
Joined Jan 2006
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man thats looking sweet! done yet?? lol
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Old Sep 03, 2012, 01:09 AM
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white lake michigan
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Cool project !
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Old Dec 19, 2012, 03:51 PM
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United States, CA, Lancaster
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Intended to use 10 cell (4c + 6c) 5000mA 40c batteries on this plane. But because of CG ended up with 2 sets. That is 10 cells at 10000mA. Plane came in at 10 lbs and with 6 lbs of batteries. Never intended to go with this setup. I still need to run the numbers to see what all this means. Wing loading is 30oz so it should be a easy flyer. May go 12cell 10000mA if its sluggish.
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Old Dec 25, 2012, 06:24 PM
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United States, CA, Lancaster
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I added 2 lbs ballast to the nose and using 10 cells 5000mA batteries for the maiden flight. AUW will be 14 lbs. WOT amp draw is 85 amps on 10 cells.

This calculates:
For 5000mA batteries
C rating = 85000mA/5000mA = 17C
Flight time = 60/17C = 3.5 min

For 10000mA batteries
C rating = 85000mA/10000mA = 8.5C
Flight time = 60/8.5C = 7 min

After first flight will install retracts and graphics.
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Last edited by p901P901; Dec 25, 2012 at 08:21 PM.
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Old Dec 25, 2012, 06:37 PM
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looks great
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Old Dec 26, 2012, 01:07 AM
I don't like your altitude
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Quote:
Originally Posted by minimicrorc View Post
looks great
Like the man said.looking forward to flight pics.
Stuart
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Old Dec 26, 2012, 02:49 AM
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United States, CA, Lancaster
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Would like to video all my maiden flights. If only I had a head cam to take video then it would be that easy. Many maidens are just the spur of the moments, after many adjustments and when the moment feels right. So this one will be the same.
So many things to focus on while flying maidens.
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Old Dec 26, 2012, 09:01 AM
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white lake michigan
Joined Oct 2004
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Looking sweet P901, A couple questions what did you use for the spar receptical's. Brass ? Are they a snug fit ? I was thinking of getting the material the 3d arf's use. Can't remember the name ( brain fart.) As you know my 23 will need the reciever's put into the fuse as I dare not try to drill out the rib's any further. And give me a run down of how you go about aligning them. I was thinking on making a jig to drill the fuse, but I may just drill them and adjust as needed if they are off a bit in the fuse.
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Old Dec 26, 2012, 10:58 AM
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Hey crash:
Yes they are brass tubes from K&S. I do not remember the P/N but they are a tight fit on the aluminum tube, so some sanding the aluminum a few thousands is necessary.
The holes in the wing ribs where carefully jigged so brass tubes were perpendicular to each other. The aluminum tubes was then inserted into the brass tubes so alignment into the wood receptacles where perfect. There is some auguring of the wood in the formers to make a loose fit. Then the holes were filled with slow cure epoxy and microballons before the aluminum tubes where installed.
The wing is a tight fit and probably would never slide off but I drilled the front spar and used a piece of 2-56 rod to secure them.

Your 23 can be done in the reverse of this process. Aluminum tubes in the wing and brass receptacles in the formers.
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Old Dec 26, 2012, 02:36 PM
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white lake michigan
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OK thanks thats what I was wondering about having a bit of room in the holes for alignment. I will have to figure out the size of the brass, but can do that when I get the alumi for the spars I can take it up to the LHS and get the brass there. Thanks UC
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Old Dec 26, 2012, 09:03 PM
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St.Catharines, Ontario
Joined Jan 2009
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sweet job on this. it looks awesome.
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