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Model Forum / Radio Controlled / Water Models / September 2005Water in hull.
Hello all, I've made a rc-model of Billing Boats, the White Star (no. 570). After several test runs (the bath-tub and litte pond) I could fine tune it during my vacation in Belgium. I've have one problem... water is coming trough the screwshaft(?) in the hull. I've used grease (vaseline) to try to prevent the water flowint trough the shaft.The amount of water was less than before the grease, but there was still water in the hull. Does someone experianced it before and maybe has a solution for it? Greeting from Holland Rudmer > Hello all, > [quoted text clipped - 8 lines] > > Does someone experianced it before and maybe has a solution for it? I usually build a "sump" under the ends of the stuffing tubes, or just position a plastic tray of some sort there, to catch the water. If it isn't coming in very fast, I just empty it out when I'm done running. Otherwise, a small pump could be used. Getting the shafts watertight is difficult. Close tolerances at the bearings, and heavy grease packing (heavier than vaseline would probably be good) is a good start. You could probably make an effective propellor-end seal with an o-ring. You'd have to fabrication something at the end of the stuffing box to hold the o-ring in slight compression to make the seal. (And use a grease that's compatible with the o-ring material.) -Wm > Hello all, > [quoted text clipped - 12 lines] > > Rudmer I gather from researching the subject a bit, that a 'plain' stuffing tube has a total clearence of approximately 1/32"(.8mm) or less, and a length of 3"(7.62cm) or more. Length seems to have more impact on keeping things dry. most of the folks I've talked to agree, vasoline does not belong on a prop shaft. plain everyday multi-purpose grease should work if you're not trying to turn high revs. hth rex > Hello all, > [quoted text clipped - 12 lines] > > Rudmer Similar problem here with a 1:350 Tirpitz from Academy that I refurbished to be self-propelled - Solution: A tiny pump connected to a water-detection circuit in the ships lowestmost part is spitting the water out now  SignatureSincerely Ruediger Try building a stuff box. Frame it in with balsa and fibreglass, and have the shaft run through it. Have the side away from the hull milled flat, and have a screw down lid. You fill the box with fibre packing material and grease, and have it packed tight, and screw down the lid. It should take care of the seepage. >> Hello all, >> [quoted text clipped - 17 lines] > be self-propelled - Solution: A tiny pump connected to a water-detection > circuit in the ships lowestmost part is spitting the water out now |
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