[roc-chat] Re: Speed of Balsa
- From: Steve Trammell <stramm8235@xxxxxxxxxxx>
- To: roc-chat@xxxxxxxxxxxxx
- Date: Tue, 10 May 2011 22:37:27 -0400 (EDT)
Hi Cliff,
I know the SkyWriter was pushing the limits on Estes tubing particularly
since it's a relatively long rocket compared to it's diameter. Having
said that I have flown Quest Nike Smokes (love that kit, only have one
left) on 29mm F's and G's. Actually got them back :-)
On Mon, May 9, 2011 at 9:36 PM, Cliff Sojourner wrote:
hey Steve, it can be done, but not with the soft tubing that comes
in the Skywriter kit. also the Estes Mongoose has the same thin,
soft tubing. LOC 24mm tubing is "sufficient".
On 2011-05-09 19:22, Steve Trammell wrote: I put sealed balsa
fins, clipped delta style, 3/16" thick, on a bashed Estes
SkyWriter and it didn't survive the transition through mach on
an AT single use, 24mm F. Jack G. still delights in busting
my chops over that flight. It was an impressive shred though;
biggest piece left was the nose cone.
Steve Trammell
On Sun, May 8, 2011 at 5:53 PM, Jeff Gortatowsky wrote:
I know is a 'generalization' and there are many
variables... but in general any know what sort of
acceleration or velocity makes one say,
"Okay, 1/8 inch surface mounted fins are gonna shred."
I realize the planform makes a big difference because of
flutter. Just curious because I been simulating some of my
paper and balsa 24mm MMT rockets using the newly cert'd CTI
24mm loads. The F240VM gets into the 800ft/sec range! (For
comparison an D15 is 230 and an E28 is about 450 ft/sec)
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"(Scientific) Skepticism is not a set of beliefs, it is a set
of methods for asking questions about reality." -- Doctor
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