SV: Re: Wanted - Propeller

B

Bo Strander

Guest
About "metal-props".
I agree with those how have some doubts about the original nylon-propellers.
I have done some simple calculations and pressure-tests on my props and they
will for sure not have the same shape in high revs as they have statically.
In sweden we can buy a standard-propeller, PROPULSE (www.propulse.se), that
can be mounted on a number of different axles, outborders, inu-drives etc.
These propellers can be bought in different sizes, the angles of the blades
are easy to adjust and there is a built in friction coupling as a safety
device. The prices are very competitive too.
Anybody with knowledge about these or similar propellers?
Bo the swede

-----Ursprungligt meddelande-----
Fr?n: John Friese [mailto:jfriese@mindspring.com]
Skickat: den 30 juni 2003 17:37
Till: amphicar-lovers@yahoogroups.com
?mne: [amphicar-lovers] Re: Wanted - Propeller


--- In amphicar-lovers@yahoogroups.com, "a_colo_native" <minnow@a...>
wrote:
> --- In amphicar-lovers@yahoogroups.com, HAPPYHOUSE1024@C... wrote:
> > I FEEL YOUR PAIN. I HAVE 2 PROPS, 1 IS OK. I WILL LOOK IN MY GARAGE
> AFTER
> > WORK TODAY FOR YOU. I TOOK THEM OFF YEARS AGO WHEN I GOT SOME BRASS
> ONES. BRASS
> > IS SO COOL. GOTTA GO. E YOU LATER. NEMO.64 WHITE. PHX. AZ.
> >
>
> Brass props are a bad idea! If you think breaking a plastic prop is
> expensive, wait until you hit something with the brass prop and do
> serious damage to your transmission! The reason the props are plastic
> is so they break and not your trans. Brass looks cool, but the cost
> of a trans rebuild is not worth the trade. JMNSHO
>
> John
> <{{{=<

I think the brass (or bronze) props are a good idea but you would have
to replace the steel keyways with aluminum ones to provide a shear
capability in case of hitting something. This would avoid the tranny
damage that the Colorado Native worries about.
I particularly like the idead because the rear edges of a bronze prop
can be cupped which would help reduce Amphicar's high speed cavitation
problem a lot.

John Friese


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