Brecab wrote:

Any good ideas on how to drive a vacuum pump off a 13b? Is there

anybody

already doing it? If so, I would like to see a picture or drawing if

someone

has the time to post it, it would be greatly appreciated. I'm trying to

come

up with a simple solution but I haven't had much luck so far. I hate to

go

all electric, I feel like I'd be putting all my eggs in one basket If

you

know what I mean.

Al Gietzen wrote:

Seems to me that without magnetos, electric fuel pumps etc; our eggs are
already all in one basket.  Lose electric; you also lose engine driven
vacuum.  So you must design a fault tolerant electrical system; in which
case you may as well save the cost, weight, plumbing, etc. required for a
vacuum system.

I was all set to proceed with no vacuum until I discovered there is no
electric powered DG with a heading bug output for my S-Tec autopilot (other
than very expensive HSI).  But, not for this, I would eliminate the engine
driven vacuum system as a 'no-gainer'.

Al

 
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