KITFOX 5, 6, 7
YAMAHA SIDEWINDER 3 CLINDER TURBO
MOTOR MOUNT
Integrated Turbo Mount
Mounts Turbo in Stock / OEM Sled Location
Utilizes Stock / OEM Exhaust Manifold
Utilizes Stock / OEM Exhaust Cross-Over Pipe with Flex Joint
3D CAD Designed, Jigged, and Professionally TIG Welded
4130 Chromoly Steel - ALL Pieces
Exhaust Outlet / Downpipe Available Soon!
9.8lbs
KITFOX 5, 6, 7
YAMAHA NYTRO 3 CYLINDER N/A
MOTOR MOUNT
KITFOX 4 - 1200LB
YAMAHA NYTRO 3 CYLINDER N/A
MOTOR MOUNT
4130 Chromoly
3D CAD Designed, Jigged, and Professionally TIG Welded
6.3lbs
Header will be available soon!
Note: The design of the Yamaha 3 Cylinder and the SkyTrax Gearbox pushes the prop flange of this combination in the Kitfox 4 about 1-7/8" farther forward than the Apex / Skytrax combination.
All of our motor mounts have been 3D CAD designed and guaranteed to work with our Header and our secondary Oil Cooling / Thermostat Kit. ALL tubing material is 4130 Chromoly Steel, LASER Cut & Notched, and Professionally TIG Welded. The design has been G Load Tested to 1.5x (6 G’s) - See Video at top of this page!
Scroll through the pictures of each motor mount below. You can Right Mouse Click pictures to view full size.
Kitfox 5-7 Sidewinder / Nytro Motor Mount: This 3 Cylinder Yamaha motor mount is constructed just like our Apex mounts and to the same standards. It locates the prop flange in the same exact location as the Apex. We have designed this motor mount to have very desirable CG with no need to add aft ballast. The cowl is currently the biggest challenge in this installation. There are a few options, but starting with the Lycoming Cowl & Firewall will be the easiest.
Motor Mount Building
I regularly get asked if we will build 1-off / custom motor mounts. Unfortunately we don't. Simply because it's more involved & costly than most realize to build a mount of this caliber. Besides the initial design time for the mount itself, there is design time & cost for the fixture. This really doesn't become economical from a business perspective until you will be making 10+ mounts. Our laser cutter has 5 each minimums to begin with. We have 2 shipping costs before the mount is even built. From the tubing supplier to laser cutter, then from the laser cutter to us. Like anything reduced cost comes with scaling and there just isn't enough volume in any of the Yamaha components to reduce cost by scale. Therefore the only way for a home builder to reduce cost is to build themselves. But here is how we do it to put Yamaha's into Kitfox Aircraft.
Note - 1: This video is after several cycles, returning to 1G (0 Deflection), and repeating. Motor Mount always returned to 0 Deflection, within a few thousands of an inch!
VIDEO: G-Load Test Fixture.
Note - 2: This was a “Pre Production” mount with Main Tubes being 1” x .047” and all other tubes .5” x .035”. To add an additional factor of safety ALL production Main Tubes have been increased to 1.125” x .058”, and all other tubes increased to .625” x .035. In addition the Engine Mounting Tabs were increased from .070” to .100” and more recently increased to .125”.
Just Aircraft - Highlander & Super STOL
Contact Wildwest Aircraft!
Wildwest Aircraft has the exclusive on the Vector motor mounts for these airframes. Click Link to the Right >>>>
Note: Our Vector designed Header does fit this motor mount on these airframes.