RE: .o49 engines by cox  
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RE: .o49 engines by cox - 6/25/2008 3:02:13 PM   
jessiej



Posts: 1803
Joined: 7/6/2003
From: STATESBORO, GA, USA
Status: offline
quote:

ORIGINAL: Bugzidor

The prop. is a vintage 'SCAMPER', I guess and I hope, I should have a video clip of this carb. available, soon.



I would recommend saving that prop as a collectable. I fired up an engine with one a couple of years ago and the lovely clear prop shattered after a few seconds of running.

jess

(in reply to Bugzidor)
       Post #: 51

RE: .o49 engines by cox - 6/27/2008 3:41:20 PM   
Yuu


 

Posts: 317
Joined: 9/4/2006
From: Shawano, WI, USA
Status: offline 		I put the AP carb on the SureStart and it stuck out 5/8" beyond the rear of the grey plastic plate. How did you get the carb in there 'so short'? I used the plastic 'tube' the NVA goes in, covered that with a black piece of automotive rubber hose, right over the NVA hole, and plugged the carb into the black rubber. Then I shortened the black rubber until the carb hit the grey plastic tube near where the NVA goes through. No zip ties or hose clamps; just tight rubber hose. But the carb is still 5/8" out behind the engine mount screw holes. I built a test stand to run it. It can be done with a long motor mount stand-off... longer than the SS stand-off for the stock engine. I ran four 3/4 oz. tanks of fuel through it, and it throttles up and down pretty good, IMO. I need to remount it and get some tach readings.
I took it off so I could clean and run an engine for a kid from the 4H group here. Got two of his engines started and he was thrilled. Then I let him fly the CL 'Yellow Peril".... which made 1/2 a lap and the 'landing' busted the right wing into 15 pieces!! But it doesn't count as a "CRASH" because he didn't break the prop! ha ha

(in reply to Bugzidor)
       Post #: 52

RE: .o49 engines by cox - 6/30/2008 10:47:12 AM   
Bugzidor


 

Posts: 10
Joined: 12/22/2007
From: Bangkok, THAILAND
Status: offline 		I make the carb. body from a small piece of aluminum bar stock, so that, it can fit inside the engine plastic back plate and cut the plastic tube that the NVA goes in then press fit the new carb.(see picture), simple, isn't it? I also link to the carb. testing video clip.

http://www.rcuvideos.com/item/D125TSC8FFZB4YS6/received

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< Message edited by Bugzidor -- 6/30/2008 10:49:49 AM >

(in reply to Yuu)
       Post #: 53

RE: .o49 engines by cox - 6/30/2008 11:15:14 AM   
topspeed


 

Posts: 24
Joined: 9/22/2005
From: Oulu, FINLAND
Status: offline 		Awesome job...I just ordered a used 0.049 from a friend at 12,5 euros ( incl. mail ). There is none in stores here in Finland. I have 2 older 0.049s and one 0.02.

I have also an older Stels 0,049..they are outa business.

Pic below of it.

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(in reply to Bugzidor)
       Post #: 54

RE: .o49 engines by cox - 6/30/2008 5:53:21 PM   
jetset1968


 

Posts: 21
Joined: 5/28/2008
From: , FL, USA
Status: offline
quote:

ORIGINAL: Bugzidor

This is my latest version carb. design for SS, which has more compact and relaible throttle responsive.


Any chance you could do a pictorial or video on how you retrofitted that throttle?????

Please !

(in reply to Bugzidor)
       Post #: 55

RE: .o49 engines by cox - 7/8/2008 3:38:24 AM   
Bugzidor


 

Posts: 10
Joined: 12/22/2007
From: Bangkok, THAILAND
Status: offline 		I'm sorry that, I do not have the pictures, how to retrofit, but, I have a couple drawing. Hopefully that, you could get some idea from them.

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(in reply to jetset1968)
       Post #: 56

RE: .o49 engines by cox - 7/8/2008 11:42:00 AM   
small_rcer


 

Posts: 96
Joined: 4/26/2005
From: Halifax, NS, CANADA
Status: offline 		That design is clever!. The needle valve assembly has a venturi or carb throat body in the area of the fuel opening. The whole assembly including the needle valve rotates. Very trick!

I feel that, if Cox had thought of that, all our Cox motors would have been throttled a long time ago.

Congratulations on a very elegant design.

Jim H

(in reply to Bugzidor)
       Post #: 57

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