Is alt air required with Horizontal Induction?

TCONROY · #1 05-27-2013, 01:20 PM

I have what could possibly be a really dumb question. Does the stock XIO-360-M1B with from Van's with horizontal induction for an RV-7 require an ALT AIR control? Doing my research here and all the posts I see are related to the vertical updraft FAB engines. I know very little about these engines and we are getting close to purchasing ours.

Thanks!

shuttle · #2 05-27-2013, 01:41 PM

Hi Trevor,

The question you are really asking is "Can the air inlet/air filter get blocked?" to which I would say the answer is "Yes". A plastic bag, bird or other foreign object could block the filter. That's when the Alt Air ought to come into play.

Steve

SmilingJack · #3 05-27-2013, 03:26 PM

Yes Trevor. I also think you need one since it could get blocked.

I think you should search for all the different ideas people used to build one. I used the standard Vans alt air door, but some guys used nice setup's that probably are more airtight then mine is when closed and not in use.

Smilin' Jack · #4 05-27-2013, 04:19 PM

Trevor
In addition to the email I sent you.
My alternate door would be similar to the heater door with the pull cable.
A piano hinge trap door with a lever arm. Like I told you. I can add this any time. Alt Air is required for flying in known icing. Which I don't think I'll be
doing in my 7.
Smilin' Jack

rzbill · #5 05-28-2013, 06:41 AM

Quote:

Originally Posted by TCONROY

I have what could possibly be a really dumb question. Does the stock XIO-360-M1B with from Van's with horizontal induction for an RV-7 require an ALT AIR control? Doing my research here and all the posts I see are related to the vertical updraft FAB engines. I know very little about these engines and we are getting close to purchasing ours.

Thanks!

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