RE: GP GEE BEE (Robart Landing Gear)
I am currently assembling a GP Gee Bee. The quality of the kit is outstanding.
I disagree with the comment in Post 39 regarding the wood supplied for the wing joiner. Once all three pieces are glued together, the laminated wing joiner is light yet very strong in the compression mode (like it should be). Yes, the individual pieces of wood will bend in the lateral direction prior to laminating them together but spars don't bend in that direction when installed in the wing. The provided material is more than adequate.
I will be using a YS120AC with on-board ignition, Slimline Pitts style muffler, and an extension kit. JR4131 servos will be used on all control surfaces with carbon fiber pushrods. A micro servo for the throttle will be mounted on the firewall using the provided servo mount.
I installed the Robart gear last night. Wow ... beautiful pieces of machine work and they drop right in with minimal effort. The hole in the landing gear block needed to be opened up slightly, as the wire used by Robart is larger in diameter than the stock GP landing gear wire. Also, the GP wheels provided with my kit will not fit on the Robart axles. The ID of the brass bushing on the GP wheel is too small for the Robart axle. I don't think it's possible to drill this bushing out either, so I ordered the Robart 4" diamond tread wheels. According to Robart, the gear will add approximately 9 ounces but ground handling should be much improved. Also, I think the stock spring rate is too stiff. They provide instructions on how to cut the spring coil to soften the compression, if necessary. I takes approximately 8 pounds of force to compress the gear completely. I won't cut down the coils until the airplane is complete and ready to fly however.
I will post some pictures of the landing gear for others that are contemplating the purchase. Has anyone flown a Gee Bee with the Robart gear? If so, please post your experiences!