2 blade 3 blade whats the differance ????

[lohring]

I've been involved with these still standing straight line records:
NAMBA GX1 hydro 109+ mph set in 2005
NAMBA GX1 Sport Hydro 97+ mph
UIM 144 volt hydro 98+ mph set in 2008
NAMBA A Outboard Hydro 81+ mph
And these recently passed records:
NAMBA G1 Hydro 106+ mph
NAMBA GX2 Hydro 103+ mph

See UIM records and NAMBA records

The details of the NAMBA gas records with my picture are here on page 12.

I'm not trying to put anyone down. I'm trying to be educational from my experience of 25 years in model and full size boating.

Lohring Miller

[properchopper]

Chris holds more records than just about anyone I know. His boat designs, setups, and obviously prop choices speak for themselves! He is the LAST person I would ever argue with but



there always has to be someone of no particular fame that knows far more than the experts. Go figure.

Gee Jim, I guess the National Safety Director of NAMBA and a veteran racer with more records than you'll ever dream of is "someone of no particular fame "

I'm sure Lohring wasn't trying to dispute Chris's knowledge and accomplishmemts but was just trying to add info from his own research.

"Go Figure"

[Chris Harris]

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[sailr]

[magnum500sw]

Anyways.... I have no idea what the h@&! Just happened to my question on props. Remember 2 blade 3 blade ?

[lohring]

From the link in my post above:
I had to attach it because the pictures and formula won't post. All this applies to water propellers.

Lohring Miller

Number of Blades.doc

[magnum500sw]

i found this .

http://www.propline.com/Propeller-General-Information/Propeller_Terminology.htm

[1truckerdan]

@ magnum500sw,
Thanks for that link
That is a really informative page for anyone to "grasp" prop terminology (like me), also there are links for rpm, sizing, installation, and FAQs.
Daniel

[lohring]

Be careful using internal combustion engine data for electric motors. Electric motors have a huge torque rise and don't loose rpm very quickly with increases in pitch or diameter. Heavy loads will stall an IC engine, but in electrics the current draw just goes up until things melt. There's a lot of data on propellers for model planes, but others experience seems to be the best for boats. Logging current draw is a big help.

Lohring Miller

[PumpedNotch]

Cool thread!!

[drwayne]

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I miss Chris ..............

[skyhighdiver]

Like you said: BJ26 - X642

MG - Prather S220?[/QUOTE]
I would have to say the x642 and the 445 are top notch MG props

[bwells]

All I get from Chris Harris' posts is a series of dashes all the way across the screen. Is there a link in there somewhere?

[magnum500sw]

Looks like he edited all his posts for some reason