OSA 1 Missile Boat

Made a start on an Eezebilt OSA 1 Missile Boat, whilst in lockdown and a change from gardening.

Tim

Is this a kit, Tim?

It looks quite large too

Bob

Bob

It's an Eezebilt plan printed off the website on my home printer. So cut the plan up to make templates.It's 32" long and I am using 3mm lite ply for the framework, then 2mm for the hull sides. Not decided what to use for the super structure.

If you put Eezebilt boats into Google you will see the website.

Tim

Edited By Tim Cooper on 07/04/2020 16:53:00

I have been looking at the prop tube needed for the OSA and it looks as though I may need a14" tube. Never having used one this long will it need to be supported along its length. Or should I try to find a way to use a shorter one?

Tim

Tim. I personally wouldn’t use a 4mm shaft/tube at that length, a5mm one perhaps.

Could you use a shorter tube and have to ‘bare’ shaft inside, possibly supported with a bearing or even a bit of brass tube? This would effectively give you a centre bearing, and the tube does not need to extend inside for any length?

Ashley

Re Ashley's point above, Model Boat Bits allow you to mix and match shaft and tube lengths:

https://www.modelboatbits.com/PROP-SHAFTS/

Colin

Thanks Ashley / Colin

I wondered how you could buy different lengths of tube and shaft.

I will have a look at Model Boat Bits.

Tim

Ashley / Colin

Sorted what I need to order from Model Boat Bits. Thought I might as well get the appropriate support at the same time. Would an A frame support be better that a P support or is there not much to choose between them.

Tim

Tim

An A-Frame is much better support than a P-bracket but at this size it's more a matter of appearance.

Dave M

Hi Tim,

I'm guessing the central keel doesn't support the stern tube at all when it exits the bottom of the hull ?? It does seem to be a very long stern tube at 14" almost half the length of the boat it must be at very shallow angle.

The way round this is to extend the keel to form a skeg which also protects the propeller.

Regards Ray