EJF Composite A-10 Construction - Page 4

hoser · Apr 23, 2003, 07:51 PM

that looks perfect Arthur

Arthur Knowles · Apr 24, 2003, 10:34 PM

Here is a picture of the wing after fiberglassing with .75 oz cloth and Z-Poxy finishing epoxy. I've brushed it down with 80 grit sandpaper to knock some of the high spots/overlap and will hit it later with 220, 400, and 600 before I prime it.

hoser · Apr 24, 2003, 10:50 PM

how does it fell in strength ?

Wof · Apr 25, 2003, 02:53 AM

Slow down Art i am tring to keep up with you,are you going for the curly wingtips with carved balsa?

Arthur Knowles · Apr 25, 2003, 03:37 AM

Quote:

Originally posted by hoser
how does it fell in strength ?

Much stronger than before the FG. There used to be more give in it. Now it has a hard inflexible shell. I'm sure I could break it if I tried, but if that's going to happen I want it to happen in the air!

Arthur Knowles · Apr 25, 2003, 03:44 AM

Quote:

Originally posted by Wof
Slow down Art i am tring to keep up with you,are you going for the curly wingtips with carved balsa?

I haven't decided yet. I don't have a good picture of the wingtip to base a carved balsa tip on. I thought about using the kit tips as a template/guess. If I go with carved balsa tips, I'll have to hollow out the block when finished.

Do you have a picture of the tip you can share? If you can't post it, you can e-mail it to me direct at Art@NT-Guru.Com.

As for slowing down, don't worry. There is still a LOT to do. Mostly sanding & filling. Once I have the wing finished the way I want, it's retract and servo time. I just ordered some servo mounts and covers for the plane from Hobby Lobby (used for sailplanes and include a hood for the servo arm/linkage).

I'm also debating reworking the EJF retracts. The mounting ears are very wide. So wide I think the wheel covers I'll make out of balsa will look rediculous in width. They'll have to be 1.5 ~ 1.75+ inches. I can cut at least 1/8" off each side of the mount and redrill it for closer spacing. That would drop it to 1.25 ~ 1.5 inches wide. Possibly more.

Wof · Apr 25, 2003, 05:09 AM

I do have a close up of a wingtip at home i will send it to you

JANSSENM · Apr 25, 2003, 12:02 PM

This is what I did for my RBC A10. It is close to scale and light, I think.

jans

JANSSENM · Apr 25, 2003, 12:03 PM

another....

Ed Waldrep · Apr 25, 2003, 12:56 PM

There are some great web resources out there with info and pictures including detail shots of full size aircraft. It can really help during building to see how the real thing looks.
www.aircraftresourcecenter.com Go to walkarounds and pick Jet Aircraft...there's like 7 listings for the A-10 with lots of pictures.

They also have a reviews section where they have pics of built models that are helpful, and also articles on aftermarket decal sets. I'm using decals from CAM that are 1/32 scale and i had to blow them up 2.06 times to fit. This homemade decals stuff is harder than I thought, the decal sheet has a light blue background and the decals I got made on a color copier have the same background...oh well, guess I'll need to keep trying.

Here's a nice A-10 model on the same site
http://www.aircraftresourcecenter.co...els/fea692.htm

Wof · Apr 25, 2003, 01:48 PM

Art try this view

Wof · Apr 25, 2003, 01:49 PM

There must be some aerodynamic reason for this Hoser can you help?

Wof · Apr 25, 2003, 01:53 PM

http://www.a-10.org/
Try this link hundreds of A10 pictures videos etc etc
Jans you must have a few planes on the go now i will have to call you Jans twelve kits on the go the same as me,i must finish one before i start the next.
A10 pictures to follow later.

jperch · Apr 25, 2003, 02:04 PM

Wof,

I thought those were known as "Horner Tips". I vaguely remember seeing an article in a modeling magazine many years ago. I could be way off base but I thought they reduced drag by changing the way the vortices developed on the wing tips.

Does this sound right?

Joe

Wof · Apr 25, 2003, 03:41 PM

Sounds good to me Joe.
I am no expert but there are various shaped tips to do the same thing, i seem to remember that there was a jet airliner that changed the shape of its tip increased wing performance by some 5% less fuel burned = cheaper flights.
Art i have just thought this is your building thread sorry to diversify.

Apr 24, 2003, 10:34 PM	#47
Arthur Knowles Registered User Join Date: Oct 1998 Location: Fallbrook, CA Posts: 1,113	FG Wing Here is a picture of the wing after fiberglassing with .75 oz cloth and Z-Poxy finishing epoxy. I've brushed it down with 80 grit sandpaper to knock some of the high spots/overlap and will hit it later with 220, 400, and 600 before I prime it. Attached Thumbnails 32.4 KB · Views: 299

Apr 25, 2003, 12:02 PM	#53
JANSSENM Registered User Join Date: Sep 2002 Location: New York Posts: 450	This is what I did for my RBC A10. It is close to scale and light, I think. jans Attached Thumbnails 12.9 KB · Views: 251 Last edited by JANSSENM; Apr 25, 2003 at 12:07 PM.

Apr 25, 2003, 12:03 PM	#54
JANSSENM Registered User Join Date: Sep 2002 Location: New York Posts: 450	another.... Attached Thumbnails 12.7 KB · Views: 252

Apr 25, 2003, 01:48 PM	#56
Wof Registered User Join Date: Sep 2002 Location: London Southend, Great Britain (UK) Posts: 1,112	Art try this view Attached Thumbnails 30.7 KB · Views: 225

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Apr 23, 2003, 07:51 PM	#46
hoser Registered User Join Date: May 2001 Location: miami springs Posts: 2,561	that looks perfect Arthur

Apr 24, 2003, 10:50 PM	#48
hoser Registered User Join Date: May 2001 Location: miami springs Posts: 2,561	how does it fell in strength ?

Apr 25, 2003, 02:53 AM	#49
Wof Registered User Join Date: Sep 2002 Location: London Southend, Great Britain (UK) Posts: 1,112	Slow down Art i am tring to keep up with you,are you going for the curly wingtips with carved balsa?

Apr 25, 2003, 05:09 AM	#52
Wof Registered User Join Date: Sep 2002 Location: London Southend, Great Britain (UK) Posts: 1,112	I do have a close up of a wingtip at home i will send it to you

Apr 25, 2003, 12:56 PM	#55
Ed Waldrep Registered User Join Date: Dec 1996 Location: Las Vegas, NV Posts: 7,367	There are some great web resources out there with info and pictures including detail shots of full size aircraft. It can really help during building to see how the real thing looks. www.aircraftresourcecenter.com Go to walkarounds and pick Jet Aircraft...there's like 7 listings for the A-10 with lots of pictures. They also have a reviews section where they have pics of built models that are helpful, and also articles on aftermarket decal sets. I'm using decals from CAM that are 1/32 scale and i had to blow them up 2.06 times to fit. This homemade decals stuff is harder than I thought, the decal sheet has a light blue background and the decals I got made on a color copier have the same background...oh well, guess I'll need to keep trying. Here's a nice A-10 model on the same site http://www.aircraftresourcecenter.co...els/fea692.htm

Apr 25, 2003, 01:49 PM	#57
Wof Registered User Join Date: Sep 2002 Location: London Southend, Great Britain (UK) Posts: 1,112	There must be some aerodynamic reason for this Hoser can you help?

Apr 25, 2003, 01:53 PM	#58
Wof Registered User Join Date: Sep 2002 Location: London Southend, Great Britain (UK) Posts: 1,112	http://www.a-10.org/ Try this link hundreds of A10 pictures videos etc etc Jans you must have a few planes on the go now i will have to call you Jans twelve kits on the go the same as me,i must finish one before i start the next. A10 pictures to follow later.

Apr 25, 2003, 02:04 PM	#59
jperch Too lazy to repair! Join Date: Oct 2002 Location: Round Rock, Tx Posts: 3,426	Wof, I thought those were known as "Horner Tips". I vaguely remember seeing an article in a modeling magazine many years ago. I could be way off base but I thought they reduced drag by changing the way the vortices developed on the wing tips. Does this sound right? Joe

Apr 25, 2003, 03:41 PM	#60
Wof Registered User Join Date: Sep 2002 Location: London Southend, Great Britain (UK) Posts: 1,112	Sounds good to me Joe. I am no expert but there are various shaped tips to do the same thing, i seem to remember that there was a jet airliner that changed the shape of its tip increased wing performance by some 5% less fuel burned = cheaper flights. Art i have just thought this is your building thread sorry to diversify.