Ultra-Prop II Solid Carbon Fiber
Composite Propellers for Sport Aircraft,
Airboats, Hovercraft, Wind Machines and More, Now Here !
Adjustable-Pitch, Solid Carbon Fiber Composite
Propellers for Sport Aviation and Air Boating--Sold Here!
Complete Props, Replacement Blades
Shipped Same or Next Day with Your Paid Order !
We ship WORLD-WIDE, the Original Ultra-Prop and the new Ultra-Prop ll Solid Carbon Fiber Composite Propellers. Use with
belt or gear reduction-drive applications only--from 5 to 150 HP for aircraft, airboats,
hovercraft, wind machines- more, for Sale Now !
Ultra-Prop II Comes with a 30-Day Money-Back Guarantee
FREE Spinner Kit with purchase of complete 2, 3 or
4-blade Ultra-Prop II Propeller !
The durable Ultra-Prop
II is about HALF the COST of
other carbon fiber composite, adjustable pitch propellers
The OPTIONAL "Show Prop" Decorative
Scheme is Shown on the 3-Blade and 4-Blade Ultra-Prop II Propellers Above
A New, Lower Cost Solid Carbon Composite Propeller
for Sport Aviators and Air Boaters.
Convert your existing, original
Ultra-Prop I to an Ultra-Prop ll if you wish by simply replacing the blades, blade
clamping bolts and pitch blocks. Use your existing hub, as is.
The Ultra-Prop II is capable of absorbing about 3 times the HP of the original Ultra-Prop
for more demanding applications that require more powerful engines. Available with LH or
RH blades, pusher or tractor applications.
Overall blade length is 31 inches. Blade width is 4.25 inches at mid-blade, tapering to 2
inches at the tip. Weight of full length blade is 1.662 pounds each.
The Ultra-Prop II uses the same patented blade, hub
and pitch block system as the original Ultra-Prop, which has been in continuous production
since 1983. It will remain in production and sold here.
The new components of the Ultra-Prop
II are the carbon reinforced
blade, the pitch blocks and the special
blade clamping bolts. The Ultra-Prop II is 66 inches
in diameter using the 2, 3 and 4-blade hub; 67 inch diameter with the 5-blade hub and
67-1/2 inches with the 6-blade hub. The blades may be cut to any lesser diameter without
need for any special tip finishing or re-balancing. Just measure twice, cut once per
blade. We do this for you at no charge if you order a smaller diameter propeller.
The new blade is very stiff solid
composite (no foam core, etc.), has a conventional plan form with the appropriate blade twist (helix) and has a highly
efficient airfoil. The carbon reinforced engineering thermoplastic resin blade
surface is very hard and durable to withstand abrasion and water impact much better than
other blades made or coated with epoxy, paint or other similar 2-part resins. The operating temperature range is minus 60 degrees F to plus 350 degrees
Blade pitch range is 8 to 14 degrees at blade tips,
adjusted in one degree increments by changing pitch block sets. No protractor required!
The new engineering structural thermoplastic used is long carbon fiber strand reinforced
for high strength, stiffness and low weight. The blades and hub are weather resistant, UV
protected and suitable for use on the water and in rain for airboats, hovercraft and Sport
or Experimental aircraft such as ultralights, large drones, unmanned
aerial vehicles (UAV) homebuilt and kit planes.
Ultra-Prop ll can be used on all Rotax (2-stroke to
914 4-stroke) and all similar gasoline engines (2 or 4-stroke) using a reduction gearbox
or belt drive between the propeller and engine. Electric drives can be direct-drive to
propeller. A 6-blade Ultra-Prop ll can load 150 HP at 2500 propeller RPM.
The Ultra-Prop II can be used on engines
from 5 HP to 150+ HP. Each full length blade will absorb 25 HP at 2500 RPM. The designed maximum operating RPM is 2900 at 66 inch diameter. Smaller
diameters may turn a little higher RPM if needed.
Shipping World-Wide in a Compact Package !
Ultra-Prop II Propeller Prices (USD)
Complete Propeller--Each--- 4 or More Props
2-Blade---$350 (6 pounds) $330 Each
3-Blade---$425 (8 pounds) $400 Each
4-Blade---$500 (10 pounds) $470 Each
5-Blade---$575 (12 pounds) $545 Each
6-Blade---$650 (14 pounds) $615 Each
(20 inch to 67-1/2 inch diameters)
Ultra-Prop II Optional Parts
Single Replacement Blade-- $125 each
2 or more Replacement Blades-- $115 each
* New 6-1/4 inch Spinner Kit-- $65
Ultra-Prop Face Plate/Crush Plate (required)-- $20 each
Extra Pitch Blocks--$8 per blade
Propeller Mounting Bolts, Nuts, Washers set, 8 mm-- $20
Prop Mounting Bolts, Nuts, Washers set, 5/16 inch-- $20
* Free Spinner Kit with purchase of complete
Ultra-Prop II Propeller through September, 2017 !
Plus postage/shipping cost
Ultra-Prop II Propeller includes the appropriate quantity of these components:
AN4-26A-CA Blade Clamping Bolts
Specific Application Pitch Block set
2 Matching Hub Halves
Easy to Understand Assembly Instructions
Ultra-Prop II has 30-Day Money-Back
Suggestion / Quote Form Here
Order Form Here
Complete props, replacement blades
shipped same or next day with your paid order !
No more waiting weeks for complete propellers or
because all full length blades match in weight, balance and are on the
shelf--ready to ship.
Compact, Efficient, Low-Cost,
Durable Ultra-Prop II Propeller Air Drive Combinations For Airboats and
Hovercraft To 40 HP
1) You supply 22 HP Harbor Freight Predator Engine-4,000 Max. RPM (cost
Add our bolt-on 1.65 to 1
Add our 60 inch 2-blade Ultra-Prop II with adjustable pitch--$350
121+ pounds thrust typical at full throttle.
2) You supply 22 HP Harbor Freight Predator Engine-4,000 Max. RPM (cost
Add our bolt-on 1.65 to 1 belt drive--$895
Add our 40 inch 3-blade Ultra-Prop II with adjustable pitch--$400
110+ pounds thrust typical at full throttle.
3) You supply 13 HP Harbor Freight Predator Engine-3600 Max. RPM (cost
Add our bolt-on 1.4 to 1 belt drive--$895
Add our 36 inch 2-blade Ultra-Prop II with adjustable pitch--$350
70+ pounds thrust typical at full throttle.
NOTE: If you have a Honda, Briggs & Stratton or other engine of
similar HP, but limited to 3600 RPM redline, consider our 1.4 to 1 Reduction Ratio Reduction Drive System. Blade pitch can be adjusted
as needed to match/load your actual engine power.
An engine tachometer is needed to set your blade
pitch to its optimum. Disable the engine governor, then set/adjust the prop blade pitch
angle of attack to act as the engine governor to limit full throttle maximum engine RPM .
*Low Cost Propulsion for
Common Engine Applications, 30 to 120 HP, Pusher or Tractor
Rotax 912 80 HP--3-blade 66" Ultra-Prop
Rotax 912 100 HP--4-blade 66" Ultra-Prop II--$500
Rotax 914 115 HP--4-blade 66" Ultra-Prop II--$500
Rotax 582, 2.62--2-blade 66" Ultra-Prop II--$350
Rotax 582, 3.00--3-blade 66" Ultra-Prop II--$425
Rotax 582, 3.47--4-blade 66" Ultra-Prop II--$500
Rotax 582, 4.00--5-blade 66" Ultra-Prop II--$575
Rotax 503, 2.58--2-blade 64" Ultra-Prop II--$350
Rotax 503, 2.58--3-blade 60" Ultra-Prop II--$425
Rotax 447, 2.58--2-blade 60" Ultra-Prop II--$350
*Exceptions Exist Based on Cruise Speed, Pusher
or Tractor and Other Factors.
Call or email us for an Ultra-Prop
Propeller Suggestion for your particular application. We
will determine the correct pitch block set for your specific application based on the
information you provide. Use with Rotax 2 or 4-stroke, Hirth, Simonini, 2si,
Compact Radial, Rotec, HKS, Viking, Subaru and many other reduction-drive engines within
the power absorbing limits of 10 HP to 150 HP of the Ultra-Prop and
Ultra-Prop II Comes with
30-Day Money-Back Guarantee !
NOTE: The appropriate Ultra-Prop ll propeller for your Rotax
engine/gearbox application will NOT exceed the Mass Moment of Inertia limit of your Rotax
|See Belt Reduction Drive for Air-Cooled Engines Here
||CONTACT US or email:
The Original Ultra-Prop for Mini Airboats and Smaller Hovercraft
Original Ultra-Prop Propeller Prices
Mount original Ultra-Prop direct-drive on B&S, Honda engines, etc.
with the flange kit, 2 to 6-bladed props, bolt-on and go!
(20" to 59" diameters available)
2-Blade Propeller (Model 102)
3-Blade Propeller (Model 103)
4-Blade Propeller (Model 104)
5-Blade Propeller (Model 105)
6-Blade Propeller (Model 106)
Original Ultra-Prop Components Included
Go to Propeller Recommendations for the Original Ultra-Prop
Lowest cost adjustable pitch prop in the world - 34 years in
production - over 17,000 sold - satisfaction guaranteed!
Unique pitch block system holds blades at exact angle -- no
Ultra Prop blades are interchangeable --
featuring perfect balance and exceptionally smooth performance.
Suggestion-Quote Request Form Here
Ultra-Props Order Form Here
Original Ultra-Prop I Propeller Components & Accessories
||Ultra-Prop Blades - Molded high-strength, glass-reinforced composite.
Color: Black. Tip-to-root length: 26-1/4 inches. (Makes a 59" dia. prop including
hub). Score lines provided near tips for cutting to smaller custom diameters. All blades
identical and interchangeable. Specify left-hand or right-hand rotation. Price: $80 each
plus shipping. For original Ultra-Prop only.
||Pitch Blocks - Molded high strength, glass-reinforced composite.
Grooved faces provide precision alignment with blade base. Color: Black. (Two identical
blocks per blade). Separate blocks required for each setting. Block angles from 8 degrees
to 18 degrees available in 1 degree increments. Specify pitch. Price: $8 per blade plus
shipping. Use with all Ultra-Props. Return un-needed pitch blocks
for refund or credit.
||Universal Hubs - Specify 2, 3, or 4 blade. Molded high-strength
glass-reinforced composite with integral steel reinforcing plates. 6-1/2" O.D. Color:
Black. Fits 1" diameter centering pilot or optional Rotax 912/914 47 mm centering
pilot. Accommodates most mounting plate bolt hole patterns from 2-1/4" to 3-1/4"
dia. and 5/16" or 8mm prop mounting bolts. Assembled hub is 2-1/4" thick. (Two
identical halves per assembly). Price: $75, or $90 for Rotax 912, plus shipping. Use
with all Ultra-Props.
||5 and 6 Blade Hub Assemblies - High strength steel hub plates for 5
or 6-blade props. Fits 1" diameter center pilot. Six, 5/16" or 8mm prop bolts on
a 2 1/4" to 3 1/4" bolt circle. Two plates included per prop assembly. Six
5/16" ID x 5/8" OD x 1.85" long steel, tubular spacers included.
Price: $135 each or $150 with 47 mm Rotax 912 centering pilot, plus shipping. Use
with all Ultra-Props.
||Prop Flange Kit - Kit includes a taper lock bushing and matching
modified sprocket to provide the interface between keyed, straight shaft small gas engines
and the Ultra-Prop. Also provided is a "crush" or backing plate, mounting
hardware and key. Price: $105 plus shipping. Use with all Ultra-Props.
||Prop Flange Kit with Pulley - Prop Flange Kit with 6" diameter
pulley for driving an alternator. This is a popular setup when a light bank is used for
night fishing. Kit includes flange with pulley, taper lock QD bushing, two propeller
backup plates, six tubular spacers, all hardware and key for straight shaft. Price: $144
plus shipping. Use with all Ultra-Props.
||New Spinner Kit - For 2, 3 or 4-blade hubs only, includes white 6-1/4
inch polyester spinner, mounting bracket, and all extra hardware for installation. Specify
if you use 1/4 inch, 5/16 or 8 mm Propeller mounting hardware. Price: $65 plus shipping. Use
with all Ultra-Props.
||Replacement Hub Spacers - Six 5/16" ID x 5/8" OD x
1.85" long steel, tubular spacers for 5 and 6 blade hubs. Price: $20 per set of six
plus shipping. Use with all Ultra-Props.
||A/N Hardware - Blade mounting bolts: AN4-26A (2-3/4" long).
Washers: AN960-416. Lock nuts: AN365-428. Price: $5 per set of two plus shipping.
AN4-24A (2- 1/2" long) bolts for 5 and 6-blade props. Price: $6 per set of two plus
shipping. For original Ultra-Prop only.
||Hub Mounting Bolt Sleeves - (Not required for 5/16" or 8mm dia.
mounting bolts). High impact plastic or Stainless Steel. Set of 6 sleeves required if
using 1/4" mounting bolts. 1/4" ID x 5/16" OD x 2 1/4" long. Price: $8
plus shipping. For original Ultra-Prop only.
Contact Telephone Numbers:
1-251-609-0969 in USA
+1-251-609-0969 outside USA
US or email: hoverhawk(at)gnt.net
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Some Interesting Links
www.Hoverhawk.com www.WarpDriveProps.com www.AbleLegalForms.com www.BollyPropellers.com
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Fiber Propellers are Affordable, for sale, eliche, helice, solid carbon fiber composite
blades, ultra-Prop II,
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The Ultra-Prop and Ultra-Prop II propeller are manufactured by Competion
Aircraft in the USA. Hoverhawk Corporation is an authorized world-wide distributor/Dealer
of their high quality products. The photos and other information posted on this website
were provided by Competition Aircraft and is their property.
SELLER'S NOTICE AND DISCLAIMER
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 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.