BVM F-86 (60") Build Thread
10-16-2012, 05:37 PM
#51
Thread Starter
RE: BVM F-86 (60
Hi Greg,
Thanks. My door isn't connected yet, so the scissor will be in that position until it is, but when I retract the nose strut, it only clears the door opening by 1/4". Do you have any pics directly from the side?
Thanks. My door isn't connected yet, so the scissor will be in that position until it is, but when I retract the nose strut, it only clears the door opening by 1/4". Do you have any pics directly from the side?
10-17-2012, 02:59 PM
#56
Thread Starter
RE: BVM F-86 (60
Hi,
So I got some work done on the wings today, specifically on the servo pockets. I deviated from the plans/instructions a bit in this area for preference reasons.
The servo mounts are supplied laser-cut ply. These are glued to a 1/16" ply plate. The ply servo cover holds the servo in place and it's a neat little setup. My problem with it is that I really don't care for the huge cutouts for the servo arm. I prefer to have a slot that's as narrow as the thickness of the arm and only as long as the arm travel you want. In this case, I'm going to use the plate intended for the bottom instead for the top so I can make my own slots.
I've got the balsa shims sanded so that all of the servo covers are completely flush.
So I got some work done on the wings today, specifically on the servo pockets. I deviated from the plans/instructions a bit in this area for preference reasons.
The servo mounts are supplied laser-cut ply. These are glued to a 1/16" ply plate. The ply servo cover holds the servo in place and it's a neat little setup. My problem with it is that I really don't care for the huge cutouts for the servo arm. I prefer to have a slot that's as narrow as the thickness of the arm and only as long as the arm travel you want. In this case, I'm going to use the plate intended for the bottom instead for the top so I can make my own slots.
I've got the balsa shims sanded so that all of the servo covers are completely flush.
10-22-2012, 09:11 AM
#58
Thread Starter
RE: BVM F-86 (60
Thanks, Spence!
Yeah, it's an enjoyable build, that's for sure. There are a few things that are irritating, like the need for 5-40 rod. That's not a common LHS item, so i've got to go to Marshall's. I guess that's better than having 4-40 bend or strip, though....
As I said before, I don't care for the big servo arm slots (even though they're pre-cut which saves time if you don't mind their size), so I flipped the plates and used the pre-cut one for the bottom part of the mount and the un-cut one for the top. I just started with a cut with the thick dremel disc, then took a file to it. I'll further clean that up later.
The mounts are super solid, and the servos (Airtronics digital 94820) are a PERFECT fit for the provided wood. The slot that BVM cuts into the servo mounts is dead perfect, and the height of the servo is absolutely flush with the mounts as-is, so that's a win.
Speaking of servos, I did a test where I mounted a JR 3421 in a wing (that someone else built) on an aileron that has a lot of drag. When I measured the 'double-neutral' on that aileron, it was more than twice that of the Airtronics servo. Less humming, too. Not only is the Airtronics one far stronger, it's also far more precise. Of course, the real test is longevity, but so far, so great.
Yeah, it's an enjoyable build, that's for sure. There are a few things that are irritating, like the need for 5-40 rod. That's not a common LHS item, so i've got to go to Marshall's. I guess that's better than having 4-40 bend or strip, though....
As I said before, I don't care for the big servo arm slots (even though they're pre-cut which saves time if you don't mind their size), so I flipped the plates and used the pre-cut one for the bottom part of the mount and the un-cut one for the top. I just started with a cut with the thick dremel disc, then took a file to it. I'll further clean that up later.
The mounts are super solid, and the servos (Airtronics digital 94820) are a PERFECT fit for the provided wood. The slot that BVM cuts into the servo mounts is dead perfect, and the height of the servo is absolutely flush with the mounts as-is, so that's a win.
Speaking of servos, I did a test where I mounted a JR 3421 in a wing (that someone else built) on an aileron that has a lot of drag. When I measured the 'double-neutral' on that aileron, it was more than twice that of the Airtronics servo. Less humming, too. Not only is the Airtronics one far stronger, it's also far more precise. Of course, the real test is longevity, but so far, so great.
10-27-2012, 03:07 PM
#65
RE: BVM F-86 (60
Interesting seeing how the design has evolved from my earlier version.
Very little is the same.
Thanks for the tip on the Airtronics servo, worth chasing up.
My F 86 is in paint at the moment, can't wait to get it flying again.
John.
Very little is the same.
Thanks for the tip on the Airtronics servo, worth chasing up.
My F 86 is in paint at the moment, can't wait to get it flying again.
John.
10-31-2012, 12:34 PM
#66
Thread Starter
RE: BVM F-86 (60
Hi,
Glassing time. I bought some 3/4 ounce cloth from the hobby shop, but this stuff seems to be very poor quality. I used it anyway. I used West System cut 60/40 with acetone. Got one side of all surfaces done in 21 minutes. I used the dental floss trick shown in the plans to help keep the live hinge from getting stuck.
Glassing time. I bought some 3/4 ounce cloth from the hobby shop, but this stuff seems to be very poor quality. I used it anyway. I used West System cut 60/40 with acetone. Got one side of all surfaces done in 21 minutes. I used the dental floss trick shown in the plans to help keep the live hinge from getting stuck.
