richard.goode(at)russiana
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 Posted: Fri Sep 17, 2010 7:12 am Post subject: Yak-52 |
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Starting problems Yak-52
In reply to Bill Lang, a number of obvious and also concerning issues:
<![if !supportLists]>Ø <![endif]>Importantly the M14P should not be started with the magnetos on. It should only be started on booster coil, and then switched over to the magnetos when it starts. You can cause serious damage to the engine because of the amount of static advance on the magnetos.
<![if !supportLists]>Ø <![endif]>If that amount of fuel is coming out of the manifold drains, the engine is dramatically over-primed, and I suspect that most of the oil will be washed away from the cylinders!
<![if !supportLists]>Ø <![endif]>The air start is not a substitute for an electric starting motor. By its nature, as the engine turns the mixture will dramatically change. So if it does not start within one and a half revolutions it will not start.
<![if !supportLists]>Ø <![endif]>Assuming the electrical side is good, the mixture is either too rich or too weak. If too weak (clearly not in this case) it will not fire. If too rich it will typically kick-back.
<![if !supportLists]>Ø <![endif]>The over-priming is not caused by the carburettor. If the carburettor is leaking, then, since it is below the engine, excess fuel will fall into the engine cowling – and in itself is a major fire hazard in these sorts of quantities.
<![if !supportLists]>Ø <![endif]>The sorts of over-priming that comes from the super-charger, is caused by excessive hand-priming.
<![if !supportLists]>Ø <![endif]>The carburettor is very complex, and unless you know what you are doing DO NOT touch it.
<![if !supportLists]>Ø <![endif]>Do you not have an engine manual – there is a logical procedure for this within the manual?
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Herefordshire
HR5 3LW
United Kingdom
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
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