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Propeller Design Specification for Turbine Engine Aircraft

In order to assure that consideration is given to all factors that influence the propeller design process, we have prepared the following specification. It is important to provide as much detailed information as is available at this time. All information will be held in strict confidence.

Although it is sometimes possible to use existing designs, certain aircraft will benefit from a propeller that has been tailored specifically to their design requirements. The information requested on the attached forms will help us to determine whether we already have a suitable propeller for your aircraft or if a new design is warranted. In the interest of saving both time and cost, existing propellers will be offered whenever possible.

All specifications are reviewed to determine if propeller requirements are realistic and consistent with our company’s product line. If extensive development and/or testing costs are anticipated to design a propeller for your aircraft, you may be expected to share in these costs as they are incurred. Requests for products or features that are not consistent with our company’s goals may be respectfully declined.

Return of this specification to Hartzell does not commit you to any expenditure nor does it commit Hartzell to participate in any program.

If you have any questions regarding this specification, please do not hesitate to contact us.

Please provide the following information so that we can better understand the requirements for your installation:
Name*
First Last
Company
Phone*
Email*
Aircraft model*
Number of propellers*
Please enter a number from 1 to 99.
Propeller type*
- Tractor
- Pusher
Engine model*
Engine HP*
Engine RPM*
Takeoff rating (if different from above)
Takeoff HP
Takeoff RPM
Maximum Continuous HP:
Maximum Continuous RPM:
Propeller rotation as viewed from rear of aircraft:
SIngle engine
- CW
- CCW
Multi-engine Left
- CW
- CCW
Multi-engine Right
- CW
- CCW
Maximum diameter due to installation constraints*
Preferred diameter*
Number of blades preferred*
Preferred blade material*
- Aluminum
- Composite
Maximum propeller system weight*
Propeller features:
Feathering?*
- Yes
- No
Aerobatic?*
- Yes
- No
Ice Protection:
Electro-thermal de-ice system?*
- Yes
- No
Fluid anti-ice system?*
- Yes
- No
Any other important propeller requirements?
Performance Requirements

Please provide performance information below so that we can provide a suitable blade design:
Perfomance Requirements
Condition Priority Velocity (KTAS) Altitude (Feet) Delta ISA (Specify C or F) HP RPM Thrust Required (lbf)
Landing (touchdown) airspeed (to evaluate reversing characteristics):*
Aircraft takeoff rotation speed VR, KCAS:
Propeller Thrust Alignment

Please provide the following information to help us evaluate the propeller loads:
Wing Area, ft²:
Wing Span, ft:
Aspect Ratio:
Wing Taper Ratio:
Thickness Ratio:
Max. T.O. Weight, lbs:
Min. Flying Weight, lbs:
Empty Weight, lbs:
Minimum Airspeed, KCAS:
As Applicable:
V MO, KCAS:
V NE, KCAS:
M MO:
V D, KCAS:
Maximum Certified Altitude, ft:
Distance from propeller place to wing leading edge along propeller axis of rotation, ft:
Conventional Multi-Engine Airplanes:
Distance from fuselage centerline to propeller axis of rotation, ft:
Minimum distance from prop axis of rotation to fuselage exterior wal in plane of rotation, ft:
Angle from thrust axis to wing zero lift line 0T, . Below ZLL is negative (Typical range 0.0 ° to -10.0 °):
Toe angle of thrust axis to fuselage centerline, deg:
(specifiy direction), deg:
Lift Curve Slope, dC L/da per degree (Typical range 0.80-0.109 deg -1):
Upwash slope, de/da at propeller plane (Typical range 0.10 - 0.80 deg -1):
Max yaw capability of aircraft, deg:
Max approved bank angle, deg:
If the aircraft geometry or operating characteristics cannot be sufficiently described by the above information, place include drawings and data as necessary.
Spinner Geometry Information
If your cowling design is not finalized, would you like us to recommend an existing spinner design?
- Yes
- No
If you need to match an existing cowling or have a special requirement please provide the information for the table below:
"0A"
"B"
"C"
"+D" / "-D"
"E"
"R"
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