160-DZ hard to start of first run of the day
#1
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160-DZ hard to start of first run of the day
My 160-DZ on an Integral F3A runs great, smooth with excellent power. The only problem I encounter is difficulties to start on the first run of each flying session as if it takes some time for the fuel to get to the engine (some 30 seconds with electric starter and throttle in idle position).
At the end of each run I block the fuel feed line to prevent engine from flooding which I remove when I'm ready to start again. I also don't dry the engine at the end of a flying session.
Would appreciate any tip on improving the first run
Thanks,
Yoav
At the end of each run I block the fuel feed line to prevent engine from flooding which I remove when I'm ready to start again. I also don't dry the engine at the end of a flying session.
Would appreciate any tip on improving the first run
Thanks,
Yoav
#2
Senior Member
RE: 160-DZ hard to start of first run of the day
Do you have a check valve in the vent line of the tank system. I know the DZ engines don't require it, however it serves several purposes. First it keeps fuel from dripping out the vent line both on the ground, while moving the model around and also it keeps the tank system sealed up in flight. Yet allows air to flow into the tank as fuel is used up.
What I do is fill the tank, engage the check valve. However it is that you do it. I use a fuel dot between the tank and check valve. I cap the fuel dot once the tank is full of fuel, and I put a small amount of pressure into the tank. About 3-4 cranks on a hand pump. Then I block the fuel flow to the engine. Now the tank has a slight amount of pressure in it. This will push fuel to the pump when its time to start it. It will make it easier to start each time.
Its important that you have some type of blockage, hemostats, a fuel line clip, or a valve to not allow fuel to flow to the engine when the tank is under pressure. This will flood the engine. So only release the fuel line clip or hemostats when it is time to crank the engine up.
Troy Newman
Team YS
What I do is fill the tank, engage the check valve. However it is that you do it. I use a fuel dot between the tank and check valve. I cap the fuel dot once the tank is full of fuel, and I put a small amount of pressure into the tank. About 3-4 cranks on a hand pump. Then I block the fuel flow to the engine. Now the tank has a slight amount of pressure in it. This will push fuel to the pump when its time to start it. It will make it easier to start each time.
Its important that you have some type of blockage, hemostats, a fuel line clip, or a valve to not allow fuel to flow to the engine when the tank is under pressure. This will flood the engine. So only release the fuel line clip or hemostats when it is time to crank the engine up.
Troy Newman
Team YS
#3
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RE: 160-DZ hard to start of first run of the day
Hi Troy,
I thing I got the idea but before I change my fuel setup, do you think I may be able to improve the engine startup by doing one of the following:
- For the first run only, a few seconds of starter contact with open throttle?
- Refueling (maybe partially) with fuel line clip opened?
Thanks,
Yoav
I thing I got the idea but before I change my fuel setup, do you think I may be able to improve the engine startup by doing one of the following:
- For the first run only, a few seconds of starter contact with open throttle?
- Refueling (maybe partially) with fuel line clip opened?
Thanks,
Yoav
#4
Senior Member
RE: 160-DZ hard to start of first run of the day
I have no idea is your idea will work. I shared with you what I do.
This may or may not work for you.
If you set up your fuel system in the typical way that most people around the world are doing its the same as my method. If your not well then your results may vary.
Troy Newman
Team YS
This may or may not work for you.
If you set up your fuel system in the typical way that most people around the world are doing its the same as my method. If your not well then your results may vary.
Troy Newman
Team YS