Rear Engine wants to Die!

[Dave Underwood]

Can we all try and stay on topic please.

Walter, in an e-mail you suggested a 20 degree C drop in temperature with your blast tube and cover. That is great and would make a real difference at altitude.

Is your test bed similar in configuration to our aircraft with the pump at the front (propeller end) of the engine, below the baffling?

When the RVP is only 7.3 in summer mix and it is a warm day at 18 K your margins for fuel vapourisation are very narrow.

I had thought the summer RVP was over 8, but perhaps you could comment on that and the effects for us please.

As a side note, apparently adding additional cooling to the dry vac. pumps increases their life significantly as well. That has been the comment of a certain Cessna 210 owner who writes in Flying at any rate.

Walter could you please give us the benifit of your experience with fuels and temperatures and the results of your measurements on the the fuel pump.

Regards - Dave