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HomeAircraftHelicopterCentury Radikal G20-30 N640 Hawk Predator › Loosely related hawk questions
02-12-2006 08:49 PM  12 years agoPost 1
Teronzhul

rrNovice

Pensacola, FL

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One of the first things I wanted to do upon getting into this hobby was slap a camera on the helicopter and get some aerial shots. While I've been somewhat successful in this regard, the TT39 on my hawk just puts too much smoke in front of the camera at the wrong times. I had an extra boom lying around, so I extended the exhaust to the tail.

Power doesn't seem to be affected, or at least not much, but what I'm worried about is that now all the smoke goes through the tail, and the gearbox is totally soaked in oil after a long flight.

Is this going to hurt anything? Or should I just dry it off after each flight and go with it.

Pic:

Also, tuning the TT39 has been kind of a pain. I leaned it out a bit today because I noticed power was lacking, and after 5 minutes in the air the backplate didn't even feel remotely hot. The engine has had about 3 gallons through it so far. After leaning it out, climbouts were about twice as fast and fuel consumption visibly lower.

There is an audible pitch change in the sound the motor makes when I go to max throttle, which there wasn't before, but I could still hold my finger against the backplate of the motor indefinitely immediately after 10 minutes in the air. It was definitely hotter than before, but not so much that it would burn me. Does this sound right or should I lean it out more? Less?

I haven't been able to get to the local field the last 2 weeks due to weather and timing issues. Hopefully next week it'll work out, but I figured someone here might have the answers.

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02-12-2006 09:49 PM  12 years agoPost 2
SteveH

rrProfessor

Texas

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Sounds to me like you have the mixture about right. I wouldn't worry about the oil on the tail. Better there than on the camera, and it will clean up form there OK. Just make shure you don't have any metal to metal contact with the tail boom as an exhaust extention because it could effect your radio and cause a lock out. You may need to increase your top end pitch now that the engine is putting out more power.

The government cannot give you anything without first taking it from someone else.

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02-13-2006 12:29 AM  12 years agoPost 3
Teronzhul

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Pensacola, FL

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Thank you much sir, thats precisely what I wanted to know.

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02-13-2006 12:54 AM  12 years agoPost 4
Buzzin Brian

rrProfessor

College Station, Texas

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I agree with Steve. I would likely opt for a silicone tube as opposed to the boom. To much risk factor there with metal to metal contact.

Build it, fly it, crash it. Repeat as often as needed.

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02-13-2006 06:25 PM  12 years agoPost 5
jackheli

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Vancouver - Canada

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Try this:

http://www.greathobbies.com/product...prod_id=AER1024

It's easy to find an excuse to do wrong. Hard is not to find an excuse to do right.

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