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Shit box 308 powered jet boat project


73crownwagon
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17 hours ago, flyingbrick said:

Crazy. I know nothing about these things at all.. just amazed at the clearance they require 

I to was amazed by how .5 of a mm made all the difference! I'm actually interested to learn more about pitch angle and impeller design now because obviously the smallest of changes make improvements 

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On 25/12/2018 at 07:49, 73crownwagon said:

I to was amazed by how .5 of a mm made all the difference! I'm actually interested to learn more about pitch angle and impeller design now because obviously the smallest of changes make improvements 

.5mm is 20thou

Old Barry machinist would drive a truck through that!

Heck the rough/getrdun guy at work was called ten thou ted sometimes

Only needs as much clearance as there is play in the bearings + 1x beesdick

So by the squeeling of your impeller it is now right. 

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