Brushless Super Vee Props

[BCRandy]

I have a Aquacraft Brushless Super Vee. It's my first
"real" boat, as my previous efforts have both been home made
air boats. I'm going to replace the stock prop (1.41" x
1.83" - 3 blade). Aquacraft sells a metal 1.41" prop that
is said to be similar to the Octura 440-3 (1.57 x 2.198).
They also suggest a Graupner K series prop at 1.89" x 2.64"
that is 2 bladed for a performance enhancement. Now, for
the questions.....

First, what are the differences/considerations in switching
from a 3 bladed to a 2 bladed prop?

Next, I assume that a larger diameter and/or a larger pitch
will increase the load and thus heat buildup and a reduction
in battery life. But with a water cooled ESC and motor, is
this significant?

Has anyone used different props with a Super Vee? What
worked best for you?

Can anyone suggest a reference for me to learn more about
props in general?

TIA,
Randy

[Ron van Sommeren]

Goedendag Randy,

> Can anyone suggest a reference for me to learn more about props in
> general?
Haven't got a clue (RC helicopters and brushless motor building for me) and
this list is kind of quiet, but you could ask
www.rcuniverse.com/forum/default.asp?forumid=229
www.rcgroups.com/boats-54/


Brushless motor building:
www.yahoogroups.com/group/lrk-torquemax
www.rcgroups.com/electric-motor-design-and-construction-361
Motor building tips and tricks:
www.rcgroups.com/forums/showthread.php?t=240993

Vriendelijke groeten ;) Ron van Sommeren
near Nijmegen, the Netherlands
int. electric fly-in http://home.hetnet.nl/~ronvans/

[Rex Reynolds]

"BCRandy" <RMAHEUXR@bellsouth.net> wrote in message
news:QAVWj.33910$7a.8634@bignews1.bellsouth.net...
>I have a Aquacraft Brushless Super Vee. It's my first "real" boat, as my
>previous efforts have both been home made air boats. I'm going to replace
>the stock prop (1.41" x 1.83" - 3 blade). Aquacraft sells a metal 1.41"
>prop that is said to be similar to the Octura 440-3 (1.57 x 2.198). They
>also suggest a Graupner K series prop at 1.89" x 2.64" that is 2 bladed for
>a performance enhancement. Now, for the questions.....
>
> First, what are the differences/considerations in switching from a 3
> bladed to a 2 bladed prop?
>
> Next, I assume that a larger diameter and/or a larger pitch will increase
> the load and thus heat buildup and a reduction in battery life. But with
> a water cooled ESC and motor, is this significant?
>
> Has anyone used different props with a Super Vee? What worked best for
> you?
>
> Can anyone suggest a reference for me to learn more about props in
> general?
>
> TIA,
> Randy
>
the 'k-45' will give you about the same top speed as the stock prop...and
the boat will literally jump out of the water from a standing start! the
'k-48' will give you a higher top speed as well as higher temps. remember
water cooling mearly delays heat buildup, it doesn't eliminate it.
rex