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Dec 16, 2010, 08:46 PM
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GliderJim's Avatar

1/2a Mustang

Here's a little control line Mustang I scratch built a couple of years ago. Very similar to the many Dick Sarpolus 1/2a designs. Engine is a Brodak MK II.
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Dec 28, 2010, 02:50 PM
EB-66C Team Member
xplaneguy's Avatar

Cox Sky Rally Ultralight Pre & Post Electric Conversion Photos

I recently converted my Cox .049 Powered Sky Rally Ultralight to an electric powered brushless outrunner motor. Here's a few photos prior to the conversion and a few flying shots this week with the brushless motor.

Latest blog entry: Durafly Me-163 Red Rocket
Dec 28, 2010, 11:39 PM
Team LightRC
FlattyFlier's Avatar
wow, you really dont see many of thows anymore! But I still have to shame you for pulling the 049 off!!!
Jan 02, 2011, 06:03 PM
made of fire and pop rocks
bgnome's Avatar
I just browsed this/these threads all day here in the beer mines on my phone... it was a big hurry up and wait day, and Im happy to see quite a few La Sticks in here. I started building one a few years ago, and never really finished it. I origianly started it as an electric build, but I over estimated when I ordered a power plant for it.. I think what I have is more of a .15 replacement than a .049.
the 3 cell lipo that came with it all doesn't even fit in the fuse!.

anyways. over Christmas I received two kits from my father, a lanier shrike .15, an engine to go with it, and a guillows Cessna 172. the 802 kit, so it's pretty big for what it is. I think i'm going to put the cessna on the board first as my thumbs just aint ready for the shrike yet.

I have a vintage Cox golden bee I recently restored so it needs a home. any good advice on throttling it? or should I just leave it stock for the Cessna build..

or alternatively... fit the bee to the Lastick and run as is...

decisions, decisions...
Jan 02, 2011, 07:23 PM
"Unnecessary Necessity"
coriolan's Avatar

Trottle for Cox Babe Bee

The old Ace type exhaust trottle ring is the best for Cox engines, its available now from Cox international:
But having trottle is not really necessary for 1/2A and only add extra weight.
Jan 02, 2011, 08:40 PM
made of fire and pop rocks
bgnome's Avatar
dig it! thanks for the link and opinion. I knew a slip ring over the exhaust was a good throttle method, just didn't know where to find them. thing is.. I would hate to muss up a proper vintage engine with extra stuff, so I'm definitely leaning towards finishing up the Lastick with it as is.
just cant leave that little guy bolted to a 2x2 block to be run out in a vice every once in a while.. it must fly again!

though I will say that there is nothing nicer than freeing up a engine and running it for the first time after 30 years of being idle. these little guys are champs.
Jan 03, 2011, 12:12 AM
Registered User
The new intake throttles seem to be working out well. I haven't flown one yet but have done a couple of test runs on my stand. Cox International sells them as well as well as the exhaust ring throttles. Very neat little design. I guess if you want to keep the mounted tank setup, the exhaust throttle is the only option.

As for the LaStick, the .049 is a LOT of engine! I've run a TD .010 on mine and switched it over to a TD .020 back in the summer. With the .010, it's a nice sporty flier. With the TD .020, it's very fast and has spirited handling suitable for someone who's comfortable on the sticks. I'd like to see one fly with an .049 but I'm not gonna do it.

Good luck and keep us posted on the projects.
Jan 04, 2011, 04:23 PM
made of fire and pop rocks
bgnome's Avatar
thanks for the advice on that. the Golden Bee is pretty much the only 1/2A, besides two 0.15's, and I understand that's pushing the class limit.

The Bee was my fathers engine when when he was doing the control line combat years ago. I swear the thing is older than I am! but I hooked up with the nice folks at xenalook and got a new set of gaskets, defuzzed and degunked it and fired it up on the test stand for the first time in probably 25 years with the original glow head. only took three swipes with the chicken stick and she fired right up! I think the last time that engine was used for anything was as a power pod for a glider my brother was working on. he nosed it in on maiden after having the elevator servo reversed. no damage, but he seemed to just immediately lost heart after that

I get now that it's a pretty hot little engine, so I'll probably tone it down. until I get my flying thumbs back
Jan 04, 2011, 11:52 PM
"Unnecessary Necessity"
coriolan's Avatar

Cox Golden Bee

They first came out in 1962:
The oldest had the curved front end, like all Cox .049/.020 reed valve of the period.
Jan 05, 2011, 12:18 PM
made of fire and pop rocks
bgnome's Avatar
yep, mines the last one. I assume it came out sometime in the mid 70's because this things has always been around, following me like a ghost!
Jan 09, 2011, 01:10 PM
Registered User
strasbourge's Avatar

Guillows 28 inch Spitfire

Desert pink, & bear roundels...flown by my 8 and 11 year old daughters
Jan 09, 2011, 01:14 PM
Registered User
strasbourge's Avatar

Triple Cox engine Spitfire

Same Guillows model as last post. Holiday project of new 35 inch wing with 2 more engines!
Jan 12, 2011, 08:32 PM
Slow 'n Steady...Grease 'r In
kpriddle's Avatar
May I ask what the two wires that exit the fuselage under the exhaust pipes are for?

Jan 12, 2011, 08:40 PM
made of fire and pop rocks
bgnome's Avatar
perhaps loops for routing control lines?
Jan 12, 2011, 08:44 PM
Slow 'n Steady...Grease 'r In
kpriddle's Avatar
Oh! I only asked because they appear to be running rearward. Of course, they're not, though. Sorry!


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