Model Boat Mayhem

Technical, Techniques, Hints, and Tips => Engineering Techniques and Materials. => Topic started by: Gardener on August 03, 2018, 05:17:37 pm

Title: Sealing around prop shaft outer tube
Post by: Gardener on August 03, 2018, 05:17:37 pm

Hi,
What is the best thing to use under the hull to seal around the newly fitted prop shaft outer tube to make it waterproof?
Thanks
Dave

Title: Re: Sealing around prop shaft outer tube
Post by: Big Ada on August 03, 2018, 05:34:29 pm

I usually blank off the Outside of the hole with Masking tape, then create a Well around the hole on the inside and pour in a 2 part epoxy Resin, having aligned the Prop Shaft and Motor First.
Others do it their way.

Len.

Title: Re: Sealing around prop shaft outer tube
Post by: Gardener on August 03, 2018, 05:35:24 pm

 :-))  Thanks

Title: Re: Sealing around prop shaft outer tube
Post by: morley bill 1 on August 03, 2018, 06:54:32 pm

Hi I use Milliput in & outside the hull it sets very hard is watertight and can be faired in before it sets  Bill...

Title: Re: Sealing around prop shaft outer tube
Post by: Gardener on August 03, 2018, 07:02:09 pm

 :-))  Thanks

Title: Re: Sealing around prop shaft outer tube
Post by: Baldrick on August 03, 2018, 07:31:12 pm

I think it depends on the manner in which the prop shaft sleeve exits the hull. If it is a neat round hole through the stern post a bit of tape around the orifice and then stand the boat upright and pour in a bit of epoxy resin. If it is a long angled slash through the keel then I like to build up a shroud around the tube and hull to be faired in when set then a bandage of resin and tape over the inside to encapsulate the wound.

Title: Re: Sealing around prop shaft outer tube
Post by: Gardener on August 03, 2018, 07:42:48 pm

Thanks  :-))

Title: Re: Sealing around prop shaft outer tube
Post by: nemesis on August 04, 2018, 02:22:46 pm

If it is a brass outer tube make sure that you really rough it up as brass and resin do not like each other. So you are depending on a mechanical key. nemesis

Title: Re: Sealing around prop shaft outer tube
Post by: Gardener on August 04, 2018, 02:51:32 pm

 :-))  Thanks