Hoverhawk Corporation

Hoverhawk Custom-Made Wood Propellers for Aircraft, Airboats, Hovercraft, Ultralights, Home-built, Experimental, UAVs, Drones, VTOL, Wind Makers, Special Effects and Ventilation--Typically Shipped in 2 to 3 Weeks ! We have glued, laminated wood propeller blanks on the shelf ready for carving your propeller.

 There are many blade configurations available, for high & low speed craft; for high & low prop RPM

Add $125 for SAE1, SAE2, Lycoming, Continental or for a non-standard propeller bolt pattern
Add inlaid Urethane leading edges which conforms to blade shape----$45 up to 42 inch diameter, $65 for larger propellers
Propellers ship in 2 to 3 weeks typically from order date-- No one beats this fast delivery for high quality laminated maple wood propellers !

Cut to length, Do-It-Yourself Peel & Stick Urethane Blade Leading edge Tape Strips

48 inches long X 2 inches wide X 0.014 inch thick--$30 USD plus postage
 72 inches long X 2 inches wide X 0.014 inch thick--$40 USD plus postage

48 inches long X 2 inches wide X 0.008 inch thick--$26 USD plus postage
 72 inches long X 2 inches wide X 0.008 inch thick--$34 USD plus postage

Use our secure online quote request & order form HERE

Blade pitch and blade width to suit the particular application based on the customer-provided information. Cruise speed, engine horsepower, maximum propeller rpm and other information provided by the customer are used, or you may order the specific diameter and pitch you want.  See the specific customer-provided information listed below that is required before we can make your application-specific customer wood propeller. Allow 2 to 3 weeks to ship from the date of your order.

Propeller is securely shipped to you in our custom, internally-padded propeller shipping box

Call or email us to request a propeller suggestion, quote or to place your order,
Or use our secure online quote request & order form HERE

Typically Shipped in 2 to 3 Weeks !

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The Minimum Customer-Provided Information Required to Quote or Manufacture Your Custom Wood Propeller

1)  Maximum forward speed at full power ?

2)  Is the propeller to be used for producing vertical or horizontal thrust ?

3)  Cruise speed at 75% power ?

4)  Maximum horsepower the propeller must absorb at full RPM if using an internal combustion engine ?

5)  Maximum power rating of the electric motor in Kilowatts or the maximum KW's you intend to use to power the Propeller ?

6)  Maximum intended propeller RPM at full power ?

7)  Maximum diameter propeller that will fit your craft with safe clearance all around ?

8)  Direction of rotation as seen from behind with the airflow blowing in your face with the propeller installed as intended ?

9)  Add any additional information you believe may be helpful to us to understand your propeller application.

Send us an email providing the above information and we will promptly reply to you with our written quote for your custom propeller ! Copy and paste the questions above in an email with your answers, or use our quote request form HERE.

Email us here:  hoverhawkcorp (at) gmail.com

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Maintaining Your Wood Propeller for a Long Life of Service

The amount of maintenance required is dependent primarily on how well you treat your propeller. You must avoid high rpm run-ups in areas with loose sand, gravel or other debris which may be drawn into contact with the blades. Small dings are repairable, but it is always best not to cause them. 

Install optional urethane leading edges on our propellers to help protect the leading edges from small stones, sunglasses, sand, abrasive dust and water. If caught out in rain, it is suggested you should reduce power and propeller RPM to lessen the blade damage potential. Rain drops are as hard as rocks when they repeatedly hit propeller blades at over 300 MPH.

If the craft (aircraft, airboat, hovercraft, etc.) is stored outside in the weather you should put a cover on the propeller that will block the Sun's UV rays to protect the finish. The UV will erode propeller coatings and finishes over a short time. The purpose for the paint or varnish on a wood propeller is to protect the underlying porous wood from the outside environment.

If the propeller is stored off the craft, do not keep it in an air-conditioned or heated storage room. This will dry out the wood too much and could cause the propeller to change shape enough to cause vibration in use, or crack. The propeller must be stored with the blades level and horizontal to stay in balance. Otherwise, over time, the internal moisture can creep slowly downhill to the lowest blade due to gravity. Gravity is 100% reliable.

NEVER coat or clean your wood propeller's finish with any wax or cleaning solution containing silicone. If you do, trying to refinishing your propeller with paint or varnish will be a disappointment and a failure.

You may re-paint your complete propeller or only the blades or the tips after roughing up the surface a little with steel wool.  Use an outdoor grade, high quality paint such as a 2-part epoxy paint used on boat hulls, as an example. Be sure to put the same amount of coating on both blades in the same places, or your prop will become out of balance. Do not operate a propeller that is not in balance !  Bad things can happen.

Mounting Bolt Torque Specifications for our Wood Propellers

NOTE: Divide inch pounds by 12 to calculate foot pounds of torque

¼ inch bolts -- 100 inch pounds

5/16 inch bolts -- 110 inch pounds

8 mm bolts -- 112 inch pounds

3/8 inch bolts -- 130 inch pounds

7/16th inch bolts -- 160 inch pounds

½ inch bolts -- 180 inch pounds

Check bolt torque after the 1st use, after the initial 25 hours of usage, and then check/re-torque bolts every 50 hours of use.

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Propeller Math

Tip speed Calculation
RPM X Diameter Inches X .00436 = tip speed in Ft/Sec
The normal maximum tip speed for a wood prop is 900 Ft/Sec
2650 RPM X 68 X .00436 = 786 Ft/Sec
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Geometric Pitch Calculation
RPM X Pitch Inches X .000947 = Speed in MPH
This approximates the craft's potential speed
2650 X 60 X .000947 = 150 MPH
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Blade Angle Calculation
Pitch divided by Circumference = the arc. tang. = angle in Degrees
To find the angle needed at any blade station for a desired pitch.
Example: 60 inches of pitch, 65 diameter (204" circumference)
60 divided by 204 = 0.2941, then arc. tang of 0.2941 = 16.39 Degrees
https://www.gigacalculator.com/calculators/arctan-calculator.php

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Do you need an engine for your propeller?

Revmaster R-2300 cc VW-Based 85 HP Aircraft Engine-- Call 1-251-609-0969 --PRICING-- Completely assembled and test run before shipping…$9,400.00 USD., plus shipping cost.  (can be shipped worldwide)  Includes E4340 forged four main bearing, aviation crankshaft, starter, alternator system, dual CDI ignition, oil cooler, oil filter, large capacity oil pump, intake manifold, RevFlow carburetor with mixture control, SAE1 Propeller bolt pattern, 85 HP at 3200 rpm continuous, 170 pounds dry.   OPTIONAL ACCESSORIES ARE AVAILABLE such as Exhaust system, engine mount, engine mount hardware, prop crush plate and alternate air source/ram air filter assembly.  This engine is not limited to only wood propellers !  Revmaster has been in business continually since 1959 !  Sensenich wood and carbon adjustable propellers are available for this engine,

The Revmaster propeller flange and their unique thrust bearing setup shown above. No "shrink-fit" prop flange to break your crankshaft or to come loose causing your propeller to depart from your aircraft  Since the thrust load is absorbed by the thrust bearing on the propeller shaft next to the propeller, the crankshaft journals are not being pulled or pushed, or otherwise highly stressed, by the hundreds of pounds of thrust produced by the propeller. Other VW-based engine conversions use the main bearing on the flywheel end of the engine as their "thrust bearing", on the opposite end of the engine where the propeller is mounted !!

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Call or email us to request a propeller suggestion, quote or to place your order,
Or use our secure online quote request & order form HERE

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SELLER'S NOTICE, TERMS AND DISCLAIMER AGREEMENT

Prices, specifications, and availability are subject to change without notice. Products and materials advertised on this website are sold with the understanding that the buyer assumes all risks and hazards involved in their use or application. Buyer/User accepts this agreement and acknowledges assumption of all risks, hazards and further indemnifies seller by purchasing and/or using or reselling the products advertised and sold on this website. No express or implied warranties asserted nor fitness of merchantability claimed by Seller. Custom wood propellers advertised on this page are made to your specifications and are not refundable. All sales are final. The manufacturer's 60 day warranty applies to any defects in materials and workmanship. Force Majeure:  Neither Party will be liable for any failure or delay in performing an obligation under this agreement that is due to any of the following causes, to the extent beyond its reasonable control: acts of God, accident, riots, war, terrorist act, epidemic, pandemic, quarantine, civil commotion, breakdown of communication facilities, breakdown of web host, breakdown of internet service provider, natural catastrophes, governmental acts or omissions, changes in laws or regulations, national strikes, fire, explosion, generalized lack of availability of raw materials, suspension of transportation or energy or a government ordered lockdown affecting freedoms of movement or transportation.  For the avoidance of doubt, Force Majeure shall not include (a) financial distress nor the inability of either party to make a profit or avoid a financial loss, (b) changes in market prices or market conditions, or (c) a party's financial inability to perform its obligations hereunder. The seller shall make a good faith effort to fulfill any previous agreement between the parties once the performance limiting circumstances and conditions cease.

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