RE: Wing area on 24% CA Extra  
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All Forums >> RC Airplanes >> Giant Scale Aircraft - 3D & Aerobatic >> RE: Wing area on 24% CA Extra
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RE: Wing area on 24% CA Extra - 11/14/2003 12:57:31 AM   
Scoubidou



Posts: 1571
Joined: 7/7/2003
From: Boisbriand, QC, CANADA
Status: offline 		Hello Kevin,

Did you cut the engine box to fit your G26 inside the cowling? I just want to check with you before doing a mistake. I should move back the engine box by 3 inches to fit my MVVs1.6 in the cowl.
Does it make sens?
Daniel

(in reply to Mayur)
       Post #: 101

RE: Wing area on 24% CA Extra - 11/14/2003 3:11:40 AM   
Tipover


 

Posts: 433
Joined: 6/24/2002
From: Outoftown, WI, USA
Status: offline 		Daniel,

Can't remember how much I cut off. My engine box now measures about 2 inches from firewall to the first fuse former.

Kevin

(in reply to Scoubidou)
       Post #: 102

RE: Wing area on 24% CA Extra - 11/16/2003 2:48:06 AM   
Scoubidou



Posts: 1571
Joined: 7/7/2003
From: Boisbriand, QC, CANADA
Status: offline 		Ok,
For those who wants to give a diet to their 24% extra and don't care about the cash, here is what i did:

1)CF wing tube: PBG103T, PBG CARBON FIBER TUBE 7/8"x30" .035" WALL
55g for 30''. I keep the supplied black socket cause its lighter than http://www.precisionaerocomposite.com/ . It fits perfectly together.
weigh saving=89g. l
2) Graptech landing gear:It is 6-1/2" wide at the fuse, 6-3/4" Axle height, 16-5/8" spread, cut 1-1/2" to 1".
weight:165g, weight saving=40g. The main advantage here is the CF gear if higher than CA. My MVVS1.6 will get more space to turn a 18x6 prop.
I will put Duralite lithium pack (1400 ignition and 2000mamh for servos) to save another 60g
As proposed by Tipover, i will use the Kavan wheels

Tipover, your first position as lighter 24% CA Extra300L with a small gasser at 11lbs is in danger now!!

I am trying to find a way to attach the hatch to the fuse. PLease let me know if one of you have a suggestion??
That instruction manuel is a real crap!
Daniel

(in reply to Tipover)
       Post #: 103

RE: Wing area on 24% CA Extra - 11/16/2003 5:01:31 AM   
Tipover


 

Posts: 433
Joined: 6/24/2002
From: Outoftown, WI, USA
Status: offline 		Mine only weighs 8 lbs now G26 started acting up, so it went by by. I cut the foam off at the instrument panel, and added a 1/4" balsa floor. The fastening method is self explanatory....got some help from Bob The Builder

Kevin

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< Message edited by Tipover -- 11/16/2003 12:07:56 AM >

(in reply to Scoubidou)
       Post #: 104

RE: Wing area on 24% CA Extra - 12/9/2003 1:17:40 PM   
Scoubidou



Posts: 1571
Joined: 7/7/2003
From: Boisbriand, QC, CANADA
Status: offline 		Hi Kevin

1) How many down thrust did you give to the engine?
2) As you know, the engine box has already a right thrust angle. Did you keep it like proposed by the instructions or modify it?
Presently, i have 0 degre down thrust and about 3 or 4 degres right thrust.

For future 24% Extra builders, here is a suggestion to help balancing the CG with a pull pull setup on the elevator to reduce tail heavy issue.

http://www.rcuniverse.com/forum/m_616768/mpage_6/key_dave%2Cpatrick%2Cedge/tm.htm
Daniel

(in reply to Tipover)
       Post #: 105

RE: Wing area on 24% CA Extra - 12/9/2003 5:47:15 PM   
Tipover


 

Posts: 433
Joined: 6/24/2002
From: Outoftown, WI, USA
Status: offline 		Daniel,

I left the right thrust alone as per design. Ended up with a small amount of up thrust. About a 1/32" washer on the bottom of engine mount. I would'nt recommend adding any up, or down thrust to the firewall. Shim the engine as needed after test flying. Up-down thrust becomes much more sensitive with a farther back cg. Everything trim wise becomes more critical the farther the cg is back. A tiny bit of up thrust allows you to carry more down elevator trim, which will counter any ballooning effect with power cut back.

Kevin

< Message edited by Tipover -- 12/9/2003 12:52:12 PM >

(in reply to Scoubidou)
       Post #: 106

RE: Wing area on 24% CA Extra - 12/9/2003 5:55:30 PM   
Tipover


 

Posts: 433
Joined: 6/24/2002
From: Outoftown, WI, USA
Status: offline 		Daniel,

Have any pictures of your MVVS 1.6 installation in the plane??

Kevin

(in reply to Tipover)
       Post #: 107

RE: Wing area on 24% CA Extra - 12/9/2003 6:21:01 PM   
Scoubidou



Posts: 1571
Joined: 7/7/2003
From: Boisbriand, QC, CANADA
Status: offline 		Hi Kevin
I am installing the engine now but i have some old pic of the engine itself.

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(in reply to Tipover)
       Post #: 108

RE: Wing area on 24% CA Extra - 12/9/2003 6:22:48 PM   
Scoubidou



Posts: 1571
Joined: 7/7/2003
From: Boisbriand, QC, CANADA
Status: offline 		CF landing landing gear...

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(in reply to Scoubidou)
       Post #: 109

RE: Wing area on 24% CA Extra - 12/9/2003 6:25:11 PM   
Scoubidou



Posts: 1571
Joined: 7/7/2003
From: Boisbriand, QC, CANADA
Status: offline 		As you can see, the CF wing tube fits perfectly in the CA tube socket and it is very light.

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(in reply to Scoubidou)
       Post #: 110

RE: Wing area on 24% CA Extra - 12/9/2003 6:33:49 PM   
Tipover


 

Posts: 433
Joined: 6/24/2002
From: Outoftown, WI, USA
Status: offline 		Daniel,

How much weight did you save going with the carbon gear?? sure you mentioned it, but I forget.

Looks like your going to side mount your engine??

Please keep the pictures coming as you fininsh up your plane.

I might try my Moki 1.35 in mine next spring. I know it would be a vertical rocket at 10.5 lbs, just not sure if I can fly it that tail heavy. Should be good for one flight!!!

Kevin

< Message edited by Tipover -- 12/9/2003 1:35:09 PM >

(in reply to Scoubidou)
       Post #: 111

RE: Wing area on 24% CA Extra - 12/9/2003 7:16:14 PM   
Scoubidou



Posts: 1571
Joined: 7/7/2003
From: Boisbriand, QC, CANADA
Status: offline 		The engine will be side mounted.
From previous post:

1)CF wing tube: PBG103T, PBG CARBON FIBER TUBE 7/8"x30" .035" WALL
55g for 30''. I keep the supplied black socket cause its lighter than http://www.precisionaerocomposite.com/ . It fits perfectly together.
weigh saving=89g. l
2) Graptech landing gear:It is 6-1/2" wide at the fuse, 6-3/4" Axle height, 16-5/8" spread, cut 1-1/2" to 1".
weight:165g, weight saving=40g. The main advantage here is the CF gear if higher than CA. My MVVS1.6 will get more space to turn a 18x6 prop.
I will put Duralite lithium pack (1400 ignition and 2000mamh for servos) to save another 60g

In fact, the lithium cost is too expensive and i will go with NiMH pack. A lot more cheaper than lithium but lighter than Nicad.
Daniel

(in reply to Tipover)
       Post #: 112

RE: Wing area on 24% CA Extra - 12/14/2003 3:18:58 PM   
Scoubidou



Posts: 1571
Joined: 7/7/2003
From: Boisbriand, QC, CANADA
Status: offline 		Bodyman,
On previous posts, your pic 5 and 6 seem to show a wing black nut 1/4 at the wing root? Do you have more pics or details on your set up please with part number? With my CF wing tube i can not thread it and i plan to install a wing nut between the fuse and wing root. Did you use a nylon nut or metal nut?
Thanks

Daniel


http://www.rcuniverse.com/forum/m_1077535/mpage_2/key_wing%2Cloading%2C24%25/tm.htm

(in reply to Tipover)
       Post #: 113

RE: Wing area on 24% CA Extra - 12/14/2003 4:36:20 PM   
DENNIS C



Posts: 2965
Joined: 7/8/2002
From: frisco, TX, USA
Status: offline
quote:

ORIGINAL: Scoubidou

Bodyman,
On previous posts, your pic 5 and 6 seem to show a wing black nut 1/4 at the wing root? Do you have more pics or details on your set up please with part number? With my CF wing tube i can not thread it and i plan to install a wing nut between the fuse and wing root. Did you use a nylon nut or metal nut?
Thanks

Daniel


http://www.rcuniverse.com/forum/m_1077535/mpage_2/key_wing%2Cloading%2C24%25/tm.htm




Hey guy's glad to