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Old 07-26-2016, 11:18 PM   #1
rpm
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Chronic Deadstick DA200L


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Help Please!

I have been having trouble with repeated deadsticks with my DA200L in a Carden Extra 300 Pro. It has happened 5 times recently while practicing IMAC sequences, every time it has been noticed after the hammer, stall turn centre 1/4 roll, opposite 1.1/4 roll to an inverted exit.

Remedies tried
- new gasket kits in carburetors
- low and high speed set to factory default
- first two flights ok, thought resolved but deadstick third flight same position

- checked and shortened viton tubing inside tank
- removed unnecessary power pole connectors on ignitions
- started well, sounded great did half a circuit started my sequence and when I exited maneuver 7, hammer it was deadstick????
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Last edited by rpm; 07-26-2016 at 11:19 PM. Reason: typo
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Old 07-27-2016, 11:00 AM   #2
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Re: Chronic Deadstick DA200L

Paul - Hard to sort these out sometimes. I assume that when you changed out the carb gaskets you checked for junk in the carb screens.

Based on something I saw a few weeks ago at a US contest where a friend was having repeated dead sticks with a 200, you might want to drop in a new set of plugs. Even if they look good sometimes there is a problem with one and would be a fairly cheap fix.
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Old 07-27-2016, 01:35 PM   #3
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Re: Chronic Deadstick DA200L

You mentioned shorten fuel line in the tank, I assume you put a new line.
The 200 would be a twin carb, I use two tanks one for each carburetor. This way you can see if there running equal.
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Old 07-27-2016, 02:08 PM   #4
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Re: Chronic Deadstick DA200L

I have often wondered on long vertical descents , the gas is at the front of the tank, the clunk is now uncovered so the engine is only running on fuel in the line. Is it enough?
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Old 07-27-2016, 04:01 PM   #5
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Re: Chronic Deadstick DA200L

All the jet guys use air traps on their turbine systems.
Might be possible to rig a air trap for a gasser.
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Old 07-27-2016, 10:32 PM   #6
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Re: Chronic Deadstick DA200L

I got 3 flights with 8 imac sequences tonight and no dead sticks. Adding a brass tube to the viton clunk line appears to have cured the problem.

Thanks all for the helpful suggestions.
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Old 07-28-2016, 08:49 AM   #7
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Re: Chronic Deadstick DA200L

Quote:
Originally Posted by rpm View Post
I got 3 flights with 8 imac sequences tonight and no dead sticks. Adding a brass tube to the viton clunk line appears to have cured the problem.

Thanks all for the helpful suggestions.
Is this to prevent the clunk falling to the front of the tank when in a down line?
I'm pretty sure that the clunk line and fuel stays at the back of the tank in a down line.
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Old 07-31-2016, 06:44 PM   #8
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Re: Chronic Deadstick DA200L

Did a video of the tank and clunk, looks like I was wrong, the fuel drops to the front of the tank in a down line.
I started with a quarter tank of fuel and after getting some good hight I came straight down at idle and I ended up with a dead stick.
https://youtu.be/FgP3vYvc6Gs
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Old 08-03-2016, 07:47 AM   #9
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Re: Chronic Deadstick DA200L

I would have thought that the clunk should fall forward on the downline to pick up fuel at the front of tank but without the tube to stiffen it I was still getting deadsticks. I think without the tube the soft viton line was kinking preventing fuel flow, maybe even if the clunk was not in the fuel. Haven't had the deadstick problem since inserting the tube and I flew an IMAC contest over the weekend in Sault Ste. Marie without incident.
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