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Vacuum pulse line for petcock

by Evgeny Knafel in 2 Stroke Technical Questions 5 years ago

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Re: Vacuum pulse line for petcock

by Bill Hertzel » 5 years ago

Bill Hertzel

13 1.95k 7.96k

Keep it simple!!

If your vacuum line ever develops a leak in flight or anything goes wrong, the fuel gets shut OFF and down you go.

Anything that has a failure mode that Shuts OFF the Fuel is a Bad Idea.

This may have been a good idea for use on leaky vintage motorcycles but it is a BAD idea for an aircraft.

This is just an accident waiting to happen.

Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

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Re: Vacuum pulse line for petcock

by Evgeny Knafel » 5 years ago

Evgeny Knafel

5 8 11

Bill Hertzel wrote:

Keep it simple!!

If your vacuum line ever develops a leak in flight or anything goes wrong, the fuel gets shut OFF and down you go.

Anything that has a failure mode that Shuts OFF the Fuel is a Bad Idea.

This may have been a good idea for use on leaky vintage motorcycles but it is a BAD idea for an aircraft.

This is just an accident waiting to happen.

The engine is installed in a dune buggy so the risk of a fuel cut off isnt problematic.

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