Fuel injected IO360 M1B - power setting question?

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paulincapetown
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Fuel injected IO360 M1B - power setting question?

Unread post by paulincapetown » Sun Nov 23, 2014 6:41 am

If this question was asked before sorry in advance, I could not find it.

There is some discussion that in the above engine, you should never set the pitch below 2350 RPM ? i.e. manifold can be set as required but RPM never below 2350.

Can anyone clarify?
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Jan
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Re: Fuel injected IO360 M1B - power setting question?

Unread post by Jan » Tue Nov 25, 2014 7:03 am

Found some info in this FAA doc: http://www.airweb.faa.gov/Regulatory_an ... Rev_34.pdf
Have a look on page 8 and onwards.

Note that you have to know your blade numbers as well. It shows no restrictions on the M1A with the 7497 blades that is quit common on the RVs as far as I know. There is however a restritction for continious operations between 2000 and 2350 RPM on the M1B with 7666 blades.

Interesting also that on some of them there are restrictions should you be over 24" MAP, which will not be a problem at cruise levels.

BUT I would like to hear from the experts. Chalkie where are you :?:
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Re: Fuel injected IO360 M1B - power setting question?

Unread post by Kevin McCormack » Tue Nov 25, 2014 2:11 pm

Agree Jan - where are the experts (especially Chalkie)! I looked through from page 8 and found my engine but not Prop (which is F7496-2) and thus would alos like to get more input!
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Re: Fuel injected IO360 M1B - power setting question?

Unread post by Chalkie » Thu Nov 27, 2014 7:01 pm

Unfortunately the real experts are the people who made the propeller, so my advice is contact the manufacturer and ask them.

When you have the info, you could post it here. :D
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Re: Fuel injected IO360 M1B - power setting question?

Unread post by paulincapetown » Fri Nov 28, 2014 6:17 am

Sent
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Re: Fuel injected IO360 M1B - power setting question?

Unread post by paulincapetown » Fri Dec 05, 2014 6:12 am

Well there you have it!!

Not starting an engine setting debate ....... but I like to keep my setting close to squared as possible, so for slow flight happy to see below


Paul,
The –M1A engine is very similar to the –M1B and the same restrictions would apply.
With this particular propeller and the –M1A engine, there are no restrictions or placarded ranges.
Normal engine operating limitations will be the only thing to indicate on your gauges.
If you have any other questions, or if I can be of further assistance, please contact me at your convenience.


Sincerely,
Alex Krauskopf
Technical Representative
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Re: Fuel injected IO360 M1B - power setting question?

Unread post by paulincapetown » Fri Dec 05, 2014 6:12 am

Well there you have it!!

Not starting an engine setting debate ....... but I like to keep my setting close to squared as possible, so for slow flight happy to see below


Paul,
The –M1A engine is very similar to the –M1B and the same restrictions would apply.
With this particular propeller and the –M1A engine, there are no restrictions or placarded ranges.
Normal engine operating limitations will be the only thing to indicate on your gauges.
If you have any other questions, or if I can be of further assistance, please contact me at your convenience.


Sincerely,
Alex Krauskopf
Technical Representative
Loving my RV7

'One can choose one's attitude in any set of circumstances'
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Jan
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Re: Fuel injected IO360 M1B - power setting question?

Unread post by Jan » Fri Dec 05, 2014 6:29 am

Good :D
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Re: Fuel injected IO360 M1B - power setting question?

Unread post by Chalkie » Fri Dec 05, 2014 5:01 pm

Now we are all a little bit wiser. Thanks Paul.

All that remains is to convince you that over-square is GOOD for your engine, but that debate has already been hashed to death over the years. :wink:

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