[NSRCA-discussion] Integral Landing gear

Fri Feb 26 09:21:45 AKST 2010

I added 1/32” to the face of the nose ring on the fuse on the left side which increased the angle by 1/32”. If you do the math, it equates to adding about .5 degrees of right thrust. The way I did it was to block the fuse up on my table at .5 degrees positive as compared to the stab which I used as my 0 reference line. Then I glued a little bitty square of 1/32” balsa to the left side of the nose ring on the face near the outer edge. Then I applied a very thick, pasty mixture of cabosil and resin to the entire face of the nose ring and pushed a large, steel angle plate up against it. I wiped off the excess, and let it cure, using wax paper as a release film between the angle plate and resin. Since the fuse was sitting at .5 positive and the angle plate was 90 degrees to the table, the end result was that my nose ring now has .5 down thrust when the fuse is sitting at 0. The little square of 1/32 balsa canted the angle plate .5 degrees to the right. This all sounds very heavy, but the weight gain was actually about 4 grams. You may need to think about this for a second, but if your down thrust is at 0 when the fuse is at .5 positive, then the down thrust will be at -.5 when the fuse is at 0.

Verne

From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Vicente "Vince" Bortone
Sent: Friday, February 26, 2010 9:30 AM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Integral Landing gear

Verne,

Just curiosity.  When you said "add 1/32 right thrust", means to add to the one is already set at the nose ring?  Is 1/32" is at the tip of the prop?

Thanks,

Vicente "Vince" Bortone

----- Original Message -----
From: "Verne Koester" <verne at twmi.rr.com>
To: "General pattern discussion" <nsrca-discussion at lists.nsrca.org>
Sent: Friday, February 26, 2010 12:28:31 AM GMT -06:00 US/Canada Central
Subject: Re: [NSRCA-discussion] Integral Landing gear

John,
With the stab at 0, make the wing .5 positive, reduce the down thrust to .5
down, and ADD 1/32 right thrust. I'm currently finishing my third one and
got it right on the second one. Now I'm just duplicating it. Actually, the
first one flew great but needed some mixing. With the settings I just gave
you, it'll track straight forever on either knife edge with no mix. The
extra right thrust was to eliminate a slight left drift at the top of tall
verticals. I left the stab at the factory position and called that 0. Your
wing will actually be slightly negative to that so you'll need to increase
the incidence to .5. The nose ring has a little over 2 degrees down so
you'll need to remove 1.5 degrees from that. Can't help on the gear, I used
Bolly F3A Longs. BTW, set the CG at the LE of the wing tube or just a little
rearward of that, like 1/8" or so. Hope this helps.

Verne Koester

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of John Gayer
Sent: Friday, February 26, 2010 12:39 AM
To: NSRCA Mailing List
Subject: [NSRCA-discussion] Integral Landing gear

The landing gear legs I received with my Integral weigh 6 ounces and are 
very rigid as well. I noticed that when Jason listed the weights of the 
components on RC Universe that the gear legs were listed at 3.2 ounces 
which is a substantial difference.
This will be powered by a YS 170. I haven't checked yet but I intend to 
add adjusters if necessary to achieve stab incidence of 0.0 degrees and 
a wing incidence of +0.5 degrees.

 I have three questions that I would like to resolve before I get any 
further along.

1. Is there a replacement gear that is lighter and in particular more 
flexible?  Height of the gear should be about 8 inches.
2. Should the downthrust be reduced from the approximately 2 degrees 
built into the nose ring to about 0.5 degrees down or ?
3. Should the sidethrust be reduced?

Would appreciate help from those of you who have already run into these 
problems and found solutions that are working for you.

Thanks

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