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Birth of control line models in US
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Birth of control line models in US
crankbndr Sat May 25, 2013 10:51 am
I came across a story in Model Aviation Feb. 2013 about Oba St. Clair. In 1936 he flew a model with 8' wingspan and 10 lb. weight, using four lines it had controls for ailerons, rudder, elevator and throttle. WOW! He also helped get Jim Walkers bellcrank lawsuit against LM Cox dismissed in 1955.
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Re: Birth of control line models in US
bullit132 Sat May 25, 2013 11:16 am
that is a HUGE engine hes holding in his hands,what is it??
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Re: Birth of control line models in US
dckrsn Sat May 25, 2013 12:39 pm
Hey Alan, I'm thinking it's a Chunn, which I know nothing about.bullit132 wrote:that is a HUGE engine hes holding in his hands,what is it??
http://modelenginenews.org/cardfile/chunn_twin.html
Bob
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Re: Birth of control line models in US
bullit132 Sat May 25, 2013 1:48 pm
never seen anything like that before,i wonder how much horsepower that put out and rpms
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Re: Birth of control line models in US
dckrsn Sat May 25, 2013 2:06 pm
Found this(Model Engine News):
The original engines, bare, weighed in at over 12 ounces. The single MAN advertisement quoted 1/2 a horse power with a total flying weight of 18 oz including coil and batteries. Reference [1] suggests it turned a 14-8 prop at 5,000 rpm. The Fadden reproduction engines described below are quoted as turning a 10-6 at 5,600 rpm. In-line twins are great fun, and as I found out with my Prototype Taplin Twin repro, as they sound like they are going twice as fast because you are getting two bangs per rev.
The original engines, bare, weighed in at over 12 ounces. The single MAN advertisement quoted 1/2 a horse power with a total flying weight of 18 oz including coil and batteries. Reference [1] suggests it turned a 14-8 prop at 5,000 rpm. The Fadden reproduction engines described below are quoted as turning a 10-6 at 5,600 rpm. In-line twins are great fun, and as I found out with my Prototype Taplin Twin repro, as they sound like they are going twice as fast because you are getting two bangs per rev.
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Re: Birth of control line models in US
ahrma_581 Fri May 31, 2013 7:00 pm
According to the link, the Chunn is only a .32.
The cylinder on the engine he's holding looks familiar/typical 30's practice: screw on transfer. Maybe he built the engine using some available parts. Seems like he was a talented guy: check out those parts to the right of the Forster 29. Alien technology?
The cylinder on the engine he's holding looks familiar/typical 30's practice: screw on transfer. Maybe he built the engine using some available parts. Seems like he was a talented guy: check out those parts to the right of the Forster 29. Alien technology?
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