The Profile Brotherhood RC Forum banner
1 - 10 of 10 Posts

·
Registered
Joined
·
36 Posts
Discussion Starter · #1 ·
Hey, I am in the process of building an OMP FF Edge 540 and I was wondering if there are any places that need to be reinforced? For example, should the fuse behind the wing have some carbon fiber or something to make it a lil stronger? Any input is awesome.
 

·
Registered
Joined
·
1,748 Posts
Well, I broke mine behind the wing, more than once. So you might look at adding some carbon fiber, BUT, do not go and make this plane heavy. It's actually pretty tough built stock. Mine survived a lot of minor dorking before I really smacked it good and broke it.

Great plane, post some pics.
 

·
Premium Member
Joined
·
6,975 Posts
Ron Ferrer said that the fuse doubler to wing leading edge is a little weak. He use a small piece of fiberglass cloth to strengthen it. It's a little weak behind the trailing edge of the wing.. but there's no way to fix that except to stay away from tera firma!!! Some guys are using a little fiberglass back there too... But you gotta be carefull on the weight.

Mike P. had an idea to add a piece of cf cloth to the top and bottom of the fuse... Might help... Let us know how she flys!!
 

·
Registered
Joined
·
36 Posts
Discussion Starter · #4 ·
Thanks for all the suggestions. I think I am gonna put something behind the wing, just to give a little extra support. I will post some picks if I can find a digital camera to take some with. I have one more question for anyone who cares to answer. I was gonna put some Hitec digital servos in the plane, since I have never used digitals before I wanted to try them. So, which Hitec ones should I get?
 

·
Registered
Joined
·
3,931 Posts
I'd be tempted to use a little carbon fiber roving along the top and bottom surfaces of the fus in those high-stress areas.

CF is incredibly tough and rigid, especially if you're going to be applying it so that the stress is trying to bend it across the width of such a strip -- and so long as you squeegee out as much of the resin as you can, it's also incredibly light so you won't be adding much weight.

I've found that even a small amount in high-stress areas can make a huge difference in the strength of a model without any perceptable increase in weight.
 

·
Registered
Joined
·
1,748 Posts
I've got JR DS811 digitals in mine, they work well. They do tend to chatter on a hot 6V pack coming off charge, no problem just annoying.

I agree that a good ball bearing will work fine, but I have gotten to like the centering and speed of nicer servos.
 

·
Registered
Joined
·
3,931 Posts
PaulSwany said:
Digitals?? I think you could get away with some HS-475 hb's.... If you must go digital... try the HS-5475HB They are pretty cheap.
But they're also damned slow -- 0.23 seconds for 60 degrees on a 4.8v pack.

I used to think that servo speed wasn't too important-- until I threw some fast servos in a plane that had previously had HS425s.

The result was that it felt so much tighter and more precise and these days I consider speed to be an important factor in my servo choices.
 

·
Premium Member
Joined
·
6,975 Posts
I use Futaba 9202's in a few of my profiles... they are pretty slow too.. something like .20.... I really like them.. the speed never bothered me.. I just run less expo with them.
 

·
Registered
Joined
·
15,367 Posts
I think Basmntdwller did some tests on servo speeds and the ol' 9202 was actually faster than some servos with better specs. I think his theory was that the others meaured their speed at full sweep instead of from start to 60 deg. I run 9001, 9201 (older version of 9202) and 9202's all on 6v and they work pretty good IMHO.
 
1 - 10 of 10 Posts
Top