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1. 11:01 AM - Lyc. 360 - Hartzell vs. MT aluminum 2 blade (LessDragProd@aol.com)
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| Subject: | Lyc. 360 - Hartzell vs. MT aluminum 2 blade |
SoCAL-RVlist@yahoogroups.com, socal-rvlist@egroups.com
--> RV3-List message posted by: LessDragProd@aol.com
Hi All,
This information is specifically applicable to the Lycoming 360
non-counterweighted crankshaft engines.
Van's Aircraft sells 72" and 74" diameter 2 blade CS Hartzell propellers.
The aluminum 2 blade CS MT propeller (MTV-15-B/183-402) has a 72" diameter.
In the case of blade damage, the Hartzell minimum blade diameter is 72".
(So don't damage your 72" dia. Hartzell.)
In the case of blade damage, the MTV-15-B/183-402 minimum blade diameter is
68".
On a stock Lyc. 360 engine;
The Hartzell /F766xxx propeller has a RPM restriction between 2000 to 2250
RPM for continuous operation.
The Hartzell /F7496( ) propeller does not have RPM restrictions for the 180
hp Lyc. On the 200 hp Lyc., this propeller has a RPM restriction between
2000 to 2250 RPM for continuous operation.
The MTV-15-B/183-402 does not have RPM restrictions.
On an aftermarket electronic ignition, LASAR system, or FADEC system
equipped Lyc. 360 engine;
The Hartzell /F766xxx propeller has a RPM restriction between 2000 to 2250
RPM for continuous operation and a maximum continuous operating limitation of
2600 RPM.
The Hartzell /F7496( ) propeller cannot be operated above 22" MP below 2350
RPM. There is a maximum continuous operating limitation of 2600 RPM. The
maximum takeoff RPM is limited to 2650 RPM for FADEC equipped engines.
The MTV-15-B/183-402 does not have RPM restrictions.
For a Lyc. 360 engine with high compression pistons and an aftermarket
electronic ignition, LASAR system, or FADEC system;
Hartzell recommends that you do not use their propeller.
The MTV-15-B/183-402 does not have RPM restrictions.
Van sells the aluminum 2 blade CS Hartzell 72" dia. /F766xxx propellers for
$5,420, and the /F7496( ) propellers for $5,650. The spinner costs extra,
the rear bulkhead has to be trimmed to fit the hub and the spinner dome has to
be fitted to the propeller blades.
Less Drag Products, Inc, MT Propeller USA, Inc. and MT Propeller sell the
aluminum 2 blade CS MT 72" dia. propeller for $6,399. The bulkheads are
mounted on the propeller hub with a painted (or primed) spinner dome ready to be
screwed on. Basically, the propeller/spinner assembly comes ready to bolt onto
your engine with a 1/4" spinner clearance to the cowl.
The bottom line:
If you are putting together an RV with a stock Lyc. 360 engine, the 72" dia.
2 blade Hartzell can make a great package.
If your RV Lyc. 360 engine is a stock 200 hp, or has a little extra
something, then consider the MTV-15-B/183-402 propeller.
Regards,
Jim Ayers
Less Drag Products, Inc.
_www.lessdrag.com_ (http://www.lessdrag.com)
(805) 795-5377
Prices subject to change without notice.
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