ARF BASH
10-25-2002 | 09:13 PM
#1
Thread Starter
Member
Joined: Oct 2002
Posts: 85
Likes: 0
Received 0 Likes
on
0 Posts
From: michigan city , MI
ARF BASH
I have a run o the mill trainer that I HAD TO ORDER a new wing for. I dont want to assemble the wing with a dihedral. I want the wing to be sportplane like. Is this possible? HOW?
10-26-2002 | 10:58 AM
#2
Banned
Joined: Jan 2003
Posts: 4,923
Likes: 0
Received 0 Likes
on
0 Posts
From: gone,
ARF BASH
Very simple... even with a pre-built wing (as long as it hasn't ben joined at center yet)
Re-cut the dihedral braces with 25% as much dihedral. (don't go flat... it looks like the wings are drooping... a little dihedral looks flat) High school geometry will tell you how to bisect the dihedral angle... (that's 1/2... again is 1/4) Note that if your plane calls for sandwiched aluminum bracing, you have to cut new aluminum plates... as well as the ply plate(s) Use HARD aircraft grade ply from the hobby shop, or Hobby Lobby carries it (even if the stock ply wasn't as hard a material...).
When putting the root ribs in place (asssembling your own) put them in at 1/4 the indicated angle (or don't glue them and don't sheet the top center until the wings are joined... it works. [img]i/expressions/face-icon-small-wink.gif[/img] )
If doing it to an ARF wing... you have to cut a wedge of hard balsa to fit between the wing panels, and you have to use fiberglass tape reinforcement of the dihedral jont EVEN IF the wing is suposed to be bolt-together and dissasembleable. (There's a couple of these out there. The wing wil be permanently assembled.)
Re-cut the dihedral braces with 25% as much dihedral. (don't go flat... it looks like the wings are drooping... a little dihedral looks flat) High school geometry will tell you how to bisect the dihedral angle... (that's 1/2... again is 1/4) Note that if your plane calls for sandwiched aluminum bracing, you have to cut new aluminum plates... as well as the ply plate(s) Use HARD aircraft grade ply from the hobby shop, or Hobby Lobby carries it (even if the stock ply wasn't as hard a material...).
When putting the root ribs in place (asssembling your own) put them in at 1/4 the indicated angle (or don't glue them and don't sheet the top center until the wings are joined... it works. [img]i/expressions/face-icon-small-wink.gif[/img] )
If doing it to an ARF wing... you have to cut a wedge of hard balsa to fit between the wing panels, and you have to use fiberglass tape reinforcement of the dihedral jont EVEN IF the wing is suposed to be bolt-together and dissasembleable. (There's a couple of these out there. The wing wil be permanently assembled.)
10-26-2002 | 12:50 PM
#3
Thread Starter
Member
Joined: Oct 2002
Posts: 85
Likes: 0
Received 0 Likes
on
0 Posts
From: michigan city , MI
ARF BASH
Fhhuber
Let me see if I understand what you said. The wing is an ARF. It is not yet assembled. I will use fiberglass to reinforce the wing right? However what about the middle ply piece that is in the shape of a "V" Do I cut a new one, or modify the one that came with the wing?
Let me see if I understand what you said. The wing is an ARF. It is not yet assembled. I will use fiberglass to reinforce the wing right? However what about the middle ply piece that is in the shape of a "V" Do I cut a new one, or modify the one that came with the wing?
