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Old 04-27-2011, 09:25 AM
pierre smith's Avatar
pierre smith pierre smith is offline
Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,936
Default Hartzell prop RPM limits

In another thread from yesterday, Doug was shooting for economy and I went out and tried some efficiency tests.

A discussion of prop RPM limitations came up, so I called Hartzell a little while ago.

My blended airfoil prop has no RPM limitations, other than a 2700 RPM redline, and continuous operation at any RPM is OK with the IO-540 Lycs with no more than 285 HP.

The IO/O-360 engines do have an RPM "window" limitation of 2000-2250 continuous for some blades so your best bet would be to go to Hartzell for good info.

Rv10 Sold
46 years ag pilot/CFI
Air Tractor 502/PT-6
Building RV-12, Wings, fuse, emp complete. FWF in progress.
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Old 04-27-2011, 10:10 AM
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shuttle shuttle is offline
Join Date: Dec 2006
Location: UK
Posts: 368
Default Hartzell Prop Application Guide

See pages 1276 - 1291 in this document (Application Guide) for Hartzell prop details on Van's a/c: (7Mb download)

It is bang up to date - April 2011
Steve Hutt
West Sussex, UK
RV-7 G-HUTY (not flying yet)
( Tip-UP / TMX-IO-360-M1B / Hartzell 7497-2 / 1x LSE PLASMA III / Dual AF4500's / AF-Pilot AP / 695 )
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Old 04-27-2011, 02:23 PM
Flying Scotsman Flying Scotsman is offline
Join Date: Nov 2005
Posts: 1,256

Originally Posted by shuttle View Post
See pages 1276 - 1291 in this document (Application Guide) for Hartzell prop details on Van's a/c: (7Mb download)

It is bang up to date - April 2011
Forgive me if I missed this, but I didn't see the "stock" Van's IO-260-M1B 180 HP and the stock Van's BA Hartzell prop (7497) listed.

There is a listing for an IO-360 (no suffix) but for 200 HP engines, not 180HP.

There are listings for -A1A engines at 180 HP with the 7496 blades.

I asked Hartzell for this about a year ago, and they didn't have it at that time.

Am I missing it now, or is it just not there (still)?


See this thread:

and note that we were talking about STOCK Lycoming from Van's, which means 2 mags (no LASAR or anything else).
Steve "Flying Scotsman"
Santa Clarita, CA
PP-ASEL, ASES, Instrument Airplane

RV-7A N660WS flying!

Last edited by Flying Scotsman : 04-27-2011 at 02:36 PM.
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Old 04-29-2011, 01:01 PM
lesdoud lesdoud is offline
Join Date: Jan 2006
Posts: 34
Default 7497 approved on IO-360-M1B


Yes, the 7497 is approved on the stock IO-360-M1B without any restrictions. This is one of a few configurations that is not yet in Note 9 of TCDS P-920. We approved it with the LSE Plasma III so a stock engine with magnetos is approved by similarity (experience has shown electronic ignitions produce higher stresses).

We have an information sheet that I can provide if you need one? Just e-mail me at

Les Doud
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Old 04-30-2011, 09:06 PM
rckol rckol is offline
Join Date: Mar 2009
Location: Cedar Grove, WI
Posts: 13


would this approval extend to PMags?

Is it specific to any airframe?

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