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OSA 1 Missile Boat

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Tim Cooper07/04/2020 14:38:17
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365 forum posts
158 photos

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

Tim

OSA 1

OSA 1

OSA 1

Bob Abell07/04/2020 15:51:01
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8855 forum posts
2760 photos

Is this a kit, Tim?

It looks quite large too

Bob

Tim Cooper07/04/2020 16:46:46
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365 forum posts
158 photos

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

Tim Cooper14/04/2020 12:51:37
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365 forum posts
158 photos

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

ashley needham14/04/2020 13:16:01
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6499 forum posts
224 photos

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

Colin Bishop14/04/2020 14:08:26
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396 articles

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

Tim Cooper14/04/2020 14:36:34
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365 forum posts
158 photos

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

Tim Cooper15/04/2020 14:33:22
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365 forum posts
158 photos

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

Dave Milbourn15/04/2020 15:13:01
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3995 forum posts
282 photos

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

Ray Wood 215/04/2020 15:22:55
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1918 forum posts
686 photos

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

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