Sukhoi SU 31—2.75m/2.6m Page|7
You find it much easier to work on your SU-31 once it is standing on
it s wheels. Assembly of the undercarriage is pretty straight forward,
most of the work has been already done for you. The undercarriage
legs have been pre drilled and pretty much only require you to fit your
wheel of choice.
Parts Required:
Undercarriage Legs
Landing Gear Parts Bag
Wheels 4.5 -5 (not supplied) (We used DuBro 5 TL)
Tailwheel Assembly (not supplied)
Tools Required:
Electric Drill (pedestal type preferred)
Drill Bit 4.5mm,
6mm Hex driver
10mm spanner
The legs bolt to the fuselage using the 20mm x 6mm bolts provided in
the hardware pack, T nuts have been pre fitted to the undercarriage
plate. The axle bolt is 50mm x 6mm, you will also find a 6mm nut, and
a 6mm Nyloc nut to secure the wheel to the leg. Please note some
wheels need to be drilled out to accept the 6mm axle bolt. Use the
washers provided to space the wheel correctly on the axle bolt, en-
sure the wheel is not binding when the axle bolt it tensioned.
Tailwheel Assembly:
You will need a flat carbon leaf tailwheel assembly for your SU-31, there are many available from vendors like J&J
Tailwheels, or White Rose Engineering. We chose to use a J&J medium size carbon leaf tailwheel. The mounting plate
for the tailwheel is pre fitted, and has 4mm T nuts already installed. All that is required is for you to drill the hole for the
mounting bolts in your tailwheel of choice. The bolt spacing is 40mm, but please measure before you drill your tail-
wheel assembly, some variations may occur during production. Use the 15mm x 4mm cap head bolts and washers
provided in the hardware pack to mount the tailwheel assembly.
Landing Gear
