Top Gun F-15 - CG & Throws?
11-20-2003, 09:17 PM
#2
My Feedback: (1)
Join Date: Dec 2001
Location: Fort Wayne, IN
Posts: 3,759
Likes: 0
Received 0 Likes
on
0 Posts
RE: Top Gun F-15 - CG & Throws?
Measure out on each wing leading edge 11 inches, the line that will connect this point on each wing will be the balance point fo rall TGA F-15s. This is consertive and will most likly be a bit nose heavy, But nose heavy is best for first flights.
I use all the up elevator I can get, on high rate. At least 1 inch, with about 35 % expo. Ail depends on if you have the scale wing or the sport wing with the strip ailerons. More travel for the scale version. (They're Smaller) I use 3/4 inch up and down on the scale wing. #/8 would probably ba OK for the sport wings strip ailerons.
I use all the up elevator I can get, on high rate. At least 1 inch, with about 35 % expo. Ail depends on if you have the scale wing or the sport wing with the strip ailerons. More travel for the scale version. (They're Smaller) I use 3/4 inch up and down on the scale wing. #/8 would probably ba OK for the sport wings strip ailerons.
11-21-2003, 12:26 AM
#3
Thread Starter
My Feedback: (12)
Join Date: Nov 2001
Posts: 1,575
Likes: 0
Received 0 Likes
on
0 Posts
RE: Top Gun F-15 - CG & Throws?
ORIGINAL: Terry Holston
#/8 would probably ba OK for the sport wings strip ailerons.
#/8 would probably ba OK for the sport wings strip ailerons.
11-21-2003, 09:43 PM
#5
Thread Starter
My Feedback: (12)
Join Date: Nov 2001
Posts: 1,575
Likes: 0
Received 0 Likes
on
0 Posts
RE: Top Gun F-15 - CG & Throws?
Any idea how much runway for takeoff this thing will need? I will be flying off a paved runway and it is the byron version with an OS .91 VR-DF and the sport wing.
11-22-2003, 06:33 PM
#6
My Feedback: (1)
Join Date: Dec 2001
Location: Fort Wayne, IN
Posts: 3,759
Likes: 0
Received 0 Likes
on
0 Posts
RE: Top Gun F-15 - CG & Throws?
Is it one of the new versions IE: Ultra Eagle III with large rectangular engine hatch, panel lines and molded in gun port and stuff. Or one of the older versions with the "Odd" shaped hatch and no molded in details?
The New one is a wee bit heavier,and will take a bit more runway. Either should be up in less than 250 feet from a paved runway. About 350 from grass. Also make sure you have a bit of positive angle of attack. That is: a bit of nose up attitude when the plane is sitting still. Otherwisr you may just have a fast three wheel car. LOL
You want to set the nose gear steering on dual rates and have the low rate set to have no more than 1/8" movement either way off center. Too much nose gear movement will end up with scraped wing tips. Get it on the center line and advance the throttle slowly, giving yourself enough time to stay ahead of the plane.
I also shim the main gearwith washers to give a wider stance. 1/16" washer will add 3/8" on each side, making 3/4" wider gear track. With the F-15 narrow main gear, this helps a bunch!!!
Have fun
The New one is a wee bit heavier,and will take a bit more runway. Either should be up in less than 250 feet from a paved runway. About 350 from grass. Also make sure you have a bit of positive angle of attack. That is: a bit of nose up attitude when the plane is sitting still. Otherwisr you may just have a fast three wheel car. LOL
You want to set the nose gear steering on dual rates and have the low rate set to have no more than 1/8" movement either way off center. Too much nose gear movement will end up with scraped wing tips. Get it on the center line and advance the throttle slowly, giving yourself enough time to stay ahead of the plane.
I also shim the main gearwith washers to give a wider stance. 1/16" washer will add 3/8" on each side, making 3/4" wider gear track. With the F-15 narrow main gear, this helps a bunch!!!
Have fun
11-22-2003, 09:01 PM
#7
Senior Member
My Feedback: (50)
Join Date: Mar 2002
Location: Mira Mesa, CA
Posts: 5,405
Likes: 0
Received 0 Likes
on
0 Posts
RE: Top Gun F-15 - CG & Throws?
Our TGA/ Byron F-15 got off pavement in about 200 feet in no headwind- We did hold onto her with full throttle then let go 
I love that plane-
james
I love that plane-
james
11-23-2003, 10:24 PM
#8
Thread Starter
My Feedback: (12)
Join Date: Nov 2001
Posts: 1,575
Likes: 0
Received 0 Likes
on
0 Posts
RE: Top Gun F-15 - CG & Throws?
Well I have 450 feet to play with so I should be OK. Thanks for the tip on the nosewheel steering and AOA. As for which version I am getting, I haven't received it yet, but I think it is the older one without the panel lines. I didn't see any panel lines in the photos I got and the hatch curves in towards the front, so from your description I think it must be the older one.
