ASSEMBLY MANUAL B-25 Mitchell ARF - RC DEPOT

Section 8: Retractable Landing Gear InstallationThe following instructions will show you the installation ofthe optional Robart retractable landing gear.Hangar 9 offers two types of optional of Robart retractablelanding gear for the B-25 Mitchell.HANB25 Includes the following parts:• Robart tricycle retracts • Robostruts*• Retract valve• Air Tubing• Filler valve• “T” fittings• Quick disconnects • Air Tank*The Robostruts are factory cut to the correct length. Step 2Set the nose gear unit onto the mounting rails with theretract placed up against the front firewall and mark themounting hole locations.HANB25S Includes the following parts:• Robart tricycle retracts • Robostruts**The Robostruts are factory cut to the correct length.In addition, you are required to supply:• ROB164G Robart air pump to fill the air tankHardware needed to complete optionalinstallation of Robart retracts• 4-40 x 1-inch socket head bolts (12)• 4-40 blind nuts (12)• #4 washers (12)• #10 washers for axle spacers (6)• Material to fabricate the mount for the retract valve.• 2-56 ball end (2) Step 3Remove the retract unit from the mounting rails and drill a9/64-inch (4mm) hole on each of the marks.Nose Gear Installation Step 1Drill two 1/8-inch (3mm) holes in the rear bulkhead in thenose gear wheel well to accept the air lines.44