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Author Topic: Ho Hum  (Read 1143 times)

Dwayne

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Ho Hum
« on: January 26, 2010, 09:38:48 AM »
 D>K Another blah winter day so what's a guy to do, why go through some old mags. I came across a 1999 FM and there I found Dick Sarpolous' 1/2A P51 so I got out the calculator and paper and soon I had a set of plans, I'm going to power it with a Cox sure start and HiPo P/L from Cox international and a Merlin head, should be alot of fun.
Thanks
Dwayne

« Last Edit: February 08, 2010, 04:58:48 AM by Dwayne Donnelly »

Offline Tim Wescott

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Re: Ho Hum
« Reply #1 on: January 26, 2010, 09:57:15 AM »
P/L?

I have a Cap 232 that I scaled from an average of several Sarpoulis designs -- 25" span, 125 square inch area, about 7.5 ounces (after many repairs).

It is way too big and way too heavy for the Cox reed valve engines I have, at least if you want to do anything but go in a circle (good trainer, though).  I'm currently building something much smaller (~95 squares, maybe 5 ounce max) just so it'll loop!

Consider that when you're building.  I don't know, but I suspect my biggest problem is weight -- 7.5 ounces is pretty porky.
AMA 64232

The problem with electric is that once you get the smoke generator and sound system installed, the plane is too heavy.

Offline john e. holliday

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Re: Ho Hum
« Reply #2 on: January 26, 2010, 10:27:59 AM »
Put a TeeDee on those designs and see the difference.  I think the Brodak .049 would work better than the reed valve engines also.
John E. "DOC" Holliday
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Shawnee, KANSAS  66203
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Dwayne

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Re: Ho Hum
« Reply #3 on: January 26, 2010, 12:12:29 PM »
Hi Tim
P/L is piston&liner or I guess in this case cylinder, anywho the one from Cox international is supposed to add up to 20% more rpm to a stock sure start and I'm also going to use a Merlin head adapter wich is supposed add 500 to 1500 rpm, we will see...
Thanks
Dwayne
« Last Edit: January 26, 2010, 01:33:33 PM by Dwayne Donnelly »


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