Concrete is light! We used to build "Lead Sleds" for the RCM
Trophy Races. We couldn't get the planes heavy enough for
racing.
That was in the days when Planes were raced liked NASCAR rather than
the chicken time trials where it is like slalom ski racing.
And yes, Gordy, I knew a Level V who broke his wrist trying to
stop his lead sled trophy racer, in fact, I beleive he was #1.
The only problems we had were getting the planes launched, never much
of a lift issue.
Chris
BTW Gordy "Real Men Know Thermals!"
BTW Gordy "Real Men Know Thermals!"
-------- Original Message --------
Subject: Re: [RCSE] Mythbusters: Concrete Glider -- the result]
From: Martin Usher <[EMAIL PROTECTED]>
Date: Mon, November 13, 2006 9:01 pm
To: "soaring@airage.com" <soaring@airage.com>
>There is already a good bit of chatter about it already:
http://community.discovery.com/eve/forums/a/frm/f/9401967776 (Ben Wilson)
Interesting reference, disappointing threads. Only one thread added
anything to the discussion (IMO)
http://community.discovery.com/eve/forums/a/tpc/f/9401967776/m/8751951358
To me the 'concrete' bit was unimportant. The designs were 19th century
(Cayley?) so they were unlikely to perform that well even if they were
made of appropriate materials.
I'm pretty sure I could get a slope glider to work with a concrete wing
but the big question would be "Why?" -- both heavy and fragile (made
thin to keep the weight down using a brittle material -- not even proper
concrete (no aggregate)). Papier mache with a small amount of cement
binder, OTOH, may be just the job......hmmmm....... (don't laugh --
people used to make slope wings from foam cores and Christmas wrapping
paper, apparently the result is very strong).
Martin Usher
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