New go-fast 1/2A toy..
04-08-2015, 06:18 AM
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New go-fast 1/2A toy..
Hooray, they are finally available! Profi .049 speed with pipe. Cost about the same as a TD .020 in the box (today, I mean 
). I have one on the way, that makes it time to build the full monty 1/2A RC dedicated speed ship. Not sure I can slap it in the Toucan due to the need to clear the pipe.. but we'll see. Gotta grab some single blade props.
). I have one on the way, that makes it time to build the full monty 1/2A RC dedicated speed ship. Not sure I can slap it in the Toucan due to the need to clear the pipe.. but we'll see. Gotta grab some single blade props.
04-08-2015, 06:57 AM
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You likely won't see much but bench runs for a while. My ambitious project is a miniature F3 speed design wrapped around this engine, so this means a fuselage plug and mold etc. But if I can drop it in the Toucan even hanging out in the breeze, I'll do that for sure!
I guess I'll have to make a 3" diameter bench prop
- maybe there's enough left of the prop I dorked last fall.
I guess I'll have to make a 3" diameter bench prop
- maybe there's enough left of the prop I dorked last fall.
04-08-2015, 11:33 AM
#8
Profi 0.8cc for 1/2 F2-A - I sent them a message asking how much just for the pipe shipped to TX.
http://technohobby.com.ua/online-sho...ofi-08cc-12-f2
http://technohobby.com.ua/online-sho...ofi-08cc-12-f2
Last edited by Pond Skipper; 04-08-2015 at 11:56 AM.
04-08-2015, 06:46 PM
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It's the same guy I got it from. He advertises on the auction site but you can just order from him direct. He and Bill Hughes are the only Profi importers I know of.
Those are the only decent photos I can find. Based on the proto/FF version, I have a lot of confidence in this engine or I wouldn't take the financial risk. After all, they know how to make really good F2A motors.
Figure 42-45k.
Those are the only decent photos I can find. Based on the proto/FF version, I have a lot of confidence in this engine or I wouldn't take the financial risk. After all, they know how to make really good F2A motors.
Figure 42-45k.
04-08-2015, 06:52 PM
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That might be the one I get, I placed the first order. There are more. I'd sell things (my wife saw me eyeing the china cabinet) to get another one.. been waiting for it for two years.
04-08-2015, 07:18 PM
#14
I think an rc carb would be more of a shutoff than a throttle. They have to be run very rich. The rich ground setting is usually hard enough to get in the air. I wonder if the manufacturer carries some props, or recommends some. The combat props are normally fairly standard, and this is meant for something else. I would think a higher pitch would be the norm for it? Interesting project in any case.
04-08-2015, 07:40 PM
#15
I have a CS .061 Piped engine that came with a RC carb I have asked for pricing for the 1/2A pipe to TX it wont be cheap but its the only way to get the right size pipe for 1/2A nooo body sells half A pipes 
04-08-2015, 08:37 PM
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I got my piston and liner set from them at techno-hobby. Took a while because they had to special order it, but it did come.
I still havn't flown my two profi .06's yet, been out of the plane too much for the last two years, but now that I've moved across the country to a small town I think its going to be time to get the loud and fast little guys out again.
Can't wait to see what you do with this!! videos please!
I still havn't flown my two profi .06's yet, been out of the plane too much for the last two years, but now that I've moved across the country to a small town I think its going to be time to get the loud and fast little guys out again.
Can't wait to see what you do with this!! videos please!
04-09-2015, 06:44 AM
#17
I started making a 1/2A pipe mold from a CS one. I thought maybe making one from a candle, and wrapping it with some kind of fiberglass or carbon fiber and a high heat epoxy, using an aluminum head pipe might work. I have other projects now, so it is way back on the back burner. Some sort of Mousse can or even a small car pipe may serve the purpose to a point. It won't set any records, but may get the desired effect.
04-09-2015, 03:30 PM
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As a pure CL speed engine I expect the exhaust timing to be well north of 180 degrees - what, 190-192? - and I doubt it would think too much of running at other than WFO. Not sure. Expensive test subject!
I bet the proto speed/FF version would throttle fine. You can get them for about $175 I think.
I bet the proto speed/FF version would throttle fine. You can get them for about $175 I think.
