Sensenich Wood Propeller Co., Inc.

   For aircraft which cruise in the 120 - 160 mph region and use a Lycoming O-360 series engine, Sensenich recommends the model W76H( ) series. This propeller series was designed for aerobatics, with good cruise performance and vertical penetration. While the installed weight is 2/3 of a similar fixed pitch metal propeller, this weight is concentrated at the hub, resulting in much lower crankshaft stresses and reduced control forces. Wood propellers also tend to run more smoothly if maintained and stored properly.

   Because the standard Lycoming flange of 6" diameter does not provide sufficient area for wood propeller driving torque over 160 HP, Sensenich strongly recommends using a propeller adapter (or extension) with at least a 7" diameter flange and crush plate.

   Propeller pitch is selected as appropriate to aircraft type, engine rating, and climb/cruise preference. A Uralite leading edge is cast in place on the blade, which provides superior protection without any aerodynamic penalties. Resaw construction is used, with 14 laminations providing the proper combination of strength and material stability for high performance tractor aircraft. All Sensenich propellers are manufactured under strict production certificate standards, with material certification and 48 point conformity inspection for each experimental category propeller.

   Clear polyurethane finish is standard, with a gloss gray option.

   The W76HM8 propeller is experimental category, and has the same bolt pattern drilling as the standard Lycoming flange but requires use of a 7" diameter mounting flange and crush plate. The adapter assembly includes: crush plate, propeller mounting bolts, adapter mounting bolts, and adapter with customer specified extension length. The 1.25" length adapter is a "solid" type, while adapter lengths 3" and longer are of the "spool" type. Custom adapter lengths are available.

Specifications:

Standard Diameter 76 inches, can be shorter if desired

Hub Thickness 3.63 inches

Total Weight, (prop. only) 13 lbs

Prop + 1.25" assembly 22 lbs approximate

Propeller Recommendation (dia. x pitch):

NOTE: The standard pitches below will result in full throttle / level flight RPM’s approx. 2700-2750 at sea level. To reduce FTLF RPM’s by 100, increase pitch by 2 inches.

Pitts/Acrosport:

Engine Climb Standard Cruise

O-360/180 HP 76x56 76x58 76x60

O-360/200 HP 76x58 76x60 76x62

• These are pitch recommendations for most typical aircraft configurations. For all-out aerobatics, subtract two inches of pitch for better vertical performance. Please contact us with your exact application.
• Field elevations above 4,000 feet, subtract two inches of pitch.
• Diameter and pitch changes are interchangeable for equivalent RPM’s: i.e. add 2" of diameter, then reduce pitch by 2" and vice versa.

Pricing:

p/n Category Price

W76HM8-( ) propeller experimental $1012 (year 2000 price)

color option: gloss gray finish, white stripes N/A $60

M6S5 (1.25") solid adapter + hardware experimental $565

M6S16 (4") spool adapter + hardware experimental $578

The experimental "solid" adapter includes safety wire slots for added bolt torque security.

Prices subject to change without notice.

FOB Plant City, Florida, USA.

Delivery: 4-6 weeks typical.

Sensenich does not have an off-the-shelf spinner available for this design, but recommends Aircraft Spruce for spinner options. You must specify adapter type, hub drilling, and hub thickness when ordering.

Sensenich Wood Propeller Co.
2008 Wood Court - Plant City, FL 33563
Phone: (813) 752-3711 - Fax: (813) 752-2818