stunthanger.com
Engine basics => Engine set up tips => Topic started by: Lyle Spiegel on March 30, 2017, 01:29:34 PM
-
I have come in to possession two TD 049 , they are CL version. One has black nylon front, and intake has a wire mesh screen. One has red nylon front, and there i not any wire mesh on intake. What is difference in these versions? What fuel would they use? What prop would be suitable?
-
I have come in to possession two TD 049 , they are CL version. One has black nylon front, and intake has a wire mesh screen. One has red nylon front, and there i not any wire mesh on intake. What is difference in these versions? What fuel would they use? What prop would be suitable?
Check the piston on the one with a red intake body, and look for a groove around the piston near the top. If there is one, it's an 051. The red intake body was normally used to show it was an 051, but there's nothing stopping anyone from putting it on an 049.
Brett
-
as per fuel, use one with castor oil, no less than 20%. These are old school engines and it's good to keep them in good running condition. I would use Sig fuel, any nitro from 10-30% depending on what you want to do.
K
-
Fuel is 25% nitro .For oil I use 20%, 50% Castor 50% Synthetic. A 6x3 or 5.5x4 grey cox prop works well. PhillySkip
-
thanks .When I visited with John Dunkin he mentioned cutting some foam wings for 1/2A Prowler - might be fun to put the Medallion on it. HAve not played with 1/2A since I was a kid with Baby Ringmaster with Golden Bee.
-
The Medallion front ends come in handy if you a rear remote needle valve and fashion a dump tube. I used this setup to avoid the frequent breakage of the threaded carb body.
The black/red TD carb body originally meant .049/.051, but in the aftermarket it means nothing.
-
The Medallion front ends come in handy if you a rear remote needle valve and fashion a dump tube. I used this setup to avoid the frequent breakage of the threaded carb body.
The black/red TD carb body originally meant .049/.051, but in the aftermarket it means nothing.
Have you got a picture of how you did this?
Mark
-
TD 049 remote NVA made with Medallion front end.
I used to fly TD 1/2A Combat a lot. Two problems were getting the fuel line to stay on the tiny TD nipple and breaking the carb body.
I made the remote NVA's by simply soldering a fill tube to an existing valve body.
The 1/16" annealed brass dump tube is free to rotate except that it is constrained by the neoprene fuel line. This prevents breakage in most crashes. It also allowed me to use regular pacifiers on my 1/2A's without making special ones with small tubing.
The white Ace RC mount is used with the stock NVA. It also allows a standard pacifier to be connected on top.
Having the fuel line blow off the little nipple was a failure mode for others.
-
TD like pressure bladder feed, more stable runs and little difference between upright and inverted.
Check out Texas Timers for parts for this. A fine NVA is very desirable for bladder pressure.
Phil