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The Spur Gear PSRU with Automatic Centrifugal Clutch
 

Geared Drives
General Aviation Hanger
Lone Star Executive Airport
Conroe, TX 77303
936-827-5126
Bud@GearedDrives.com
 
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The Geared Drives LS Series Firewall Forward Package for RV-10

All aluminum water cooled Chevrolet engine with altitude compensating electronic fuel injection.  Spur gear propeller speed reduction unit with fully automatic centrifugal clutch. Custom programmed ECM and wiring harness. Throttle-by-wire technology. Cowling modification kit included. Ships already assembled and test run for bolt-on application to RV-10 firewall. 
Does not include prop governor, prop, or fuel pumps.

Photos can be seen on the projects page

See chart at the bottom of this page for engine to prop RPM data

Price                                                          $29,900
Additional LS Series engines available upon request. Inquire for price and availability.

Fuel:                                                          100LL or Premium Unleaded
Wet weight with all accessories:               493 lbs
Output                                                        350 HP at 4800 RPM
Torque to prop                                           546 to 602 ft lbs @ 4000 RPM
Delivery                                                      120 days from receipt of deposit
Deposit required:                                        50%

Highlights of the Firewall Forward Package for RV-10 :
 5.7L LS1 V8 Chevrolet Engine
     standard engine
INCLUDED
Electronic Fuel Injection INCLUDED
Electronic Ignition INCLUDED
Throttle by Wire               INCLUDED
Alternator, 105 amp, standard INCLUDED
Lightweight Racing starter            INCLUDED
Cooling System-
     Three pass aluminum radiator, baffling, overflow tank
INCLUDED
Engine Oil cooler INCLUDED
Ceramic Coated Exhaust System               INCLUDED
Custom Ceramic Coated Headers and exhaust INCLUDED
Engine Mount-black powder coated            INCLUDED
Modification Kit for stock RV-10 cowling               INCLUDED
Geared Drives PSRU
     1.562:1 or 1.72:1 ratio options
INCLUDED
Centrifugal Clutch Assembly INCLUDED
PSRU High Pressure Oiling System with Filter INCLUDED
Assembly INCLUDED
Test Run prior to shipping INCLUDED

Geared Drives PSRU with LS1
PSRU Ratio vs. Prop RPM and Torque to Prop
Assuming 80% prop efficiency at 2500 Prop RPM

Notice that torque begins to drop off after 4000 Engine RPM
Run the engine slower and get more power to the prop.
Save fuel but don't sacrifice performance.

Engine RPM Prop RPM at 1.562:1 Ft/Lbs Torque to Prop Prop RPM at 1.72:1 Ft/Lbs Torque to Prop HP
2500 1601 545 1453 610 160
2600 1665 550 1512 615 168
2700 1729 555 1570 618 176
2800 1793 560 1628 620 184
2900 1857 560 1686 625 190
3000 1921 561 1744 625 198
3100 1985 561 1802 625 206
3200 2049 562 1860 625 214
3300 2113 562 1919 625 223
3400 2177 563 1977 625 230
3500 2241 564 2035 626 235
3600 2305 565 2093 626 246
3700 2369 565 2151 626 255
3800 2433 564 2209 630 271
3900 2497 563 2267 629 280
4000 2564 562 2325 628 289
4100 2624 561 2383 627 300
4200 2689 560 2442 625 316
4300 2753 555 2500 619 325
4400 2817 550 2558 615 330
4500 2881 545 2616 612 335
4600 2945 543 2674 610 340

 

 

 

 

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