[NSRCA-discussion] Help Needed--Off-Topic (Cap 21 88" WS /GPGiantScale from 1980's)

Thu Mar 16 14:35:05 AKST 2006

I have .60 size GP Cap 21 that I flew in pattern, started with a .91 four-stroke, ended up with a 1.20. I did not have much of a problem snapping, but then I took out over half of the recommended elevator throw. IMHO, that is the main reason the Cap earned the snapping reputation, most people put WAY too much throw in the elevator. I used the snap switch for the avalanche, and had to do an outside snap to keep the nose from dropping out.

  The "trimming" chart that came with the kit was junk. I tossed it out after reading about adding wingtip weight to correct pulling to the side in a vertical climb. The recommended throws, as you suggested, were bogus as well.

  Until I put the 1.20 in it, it was tail heavy and took a few ounces of weight in the cowl. I did several things to save weight in the tail while I was building it, and could have done more.

  Bob R.

Rick Wallace <rickwallace45 at hotmail.com> wrote:
      Chris - 
  No experience w/ that CAP 21, but my GP .60 size one could be a real handful - with the recommended CG and throws it would snap out at the top of an inside loop... not friendly for a nove aerobatic pilot... 
  I'd say the design fully earned the nickname 'SNAP21'... 
Rick 

---------------------------------
  From: "White, Chris" <chris at ssd.fsi.com>
Reply-To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Subject: Re: [NSRCA-discussion] Help Needed--Off-Topic (Cap 21 88" WS /GPGiantScale from 1980's)
Date: Thu, 16 Mar 2006 14:53:24 -0600

      .shape  {;}        p.MsoNormal, li.MsoNormal, div.MsoNormal  {margin:0in;margin-bottom:.0001pt;font-size:12.0pt;font-family:'Century Gothic';}  p  {margin-right:0in;margin-left:0in;font-size:12.0pt;font-family:'Times New Roman';}  span.EmailStyle17  {font-family:Arial;color:windowtext;}  span.EmailStyle19  {font-family:Arial;color:navy;}  @page Section1  {size:8.5in 11.0in;margin:1.0in 1.25in 1.0in 1.25in;}  div.Section1  {page:Section1;}          I’m interested to see the answer to Dave’s question of whose kit.  I have a NIB Byron Cap 21 kit and it is the injection molded all-foam version which is designed to be monokoted as with the Byron Pitts.   I think the thing would probably do well with Glow (OS160 & pipe or Moki 210)
.but I hear they used to call them the snapping caps with a gas engine (how do you spell wing loading
) which at that time was probably the Q35. ( Also the fear of a leaking gas tank in a foam airplane???)

  Chris 

---------------------------------

  From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Dave Michael
Sent: Thursday, March 16, 2006 2:40 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Help Needed--Off-Topic (Cap 21 88" WS / GPGiantScale from 1980's)

    Who is the manufacturer?  Is an an old Byron kit?

      ----- Original Message ----- 

    From: Lisa & Larry 

    To: 'NSRCA Mailing List' 

    Sent: Thursday, March 16, 2006 3:01 PM

    Subject: [NSRCA-discussion] Help Needed--Off-Topic (Cap 21 88" WS / GP GiantScale from 1980's)

  I acquired a kit and looking for some weight saving tips. I’m trying to see if a DA-50 is a good match for this plane. I’ve heard both “yes (will have unlimited vertical)” and “no (lead sled about 24 to 26 pounds). I thought I heard this plane was designed for the quadra 35, which I believe was one a of a few gas engines available then.

  My 1st reaction to this plane weighing 26lbs was that I couldn’t build it that heavy if I tried. Then when I opened the box and saw the steel landing gear weighing in at a pound and the plans have the wing / stabs fiber-glassed and painted, I thought it’s could be possible if the quadra 35 was real heavy back then as well.

  Don’t have the experience to know so I’m hoping someone here has actual experience that may help me get it right the first time.

  Any thoughts?

  Larry

---------------------------------

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