UL-1 Power system upgrade arrived!

[detox]

The Octura collet (long version) should fit without cutting shaft.

[Jeff Wohlt]

The dremmel works well on shafts.

[Capt. Crash]

The dremmel works well on shafts.

Yes....I've cut off numerous shafts with mine but get a metal cut off disk...the thin brittle ones that come with the tool will shatter and stick in skin...eyes...etc....don't ask!


Very cool man...I can't wait to hear/see the results!

[LuckyDuc]

My first run results with the Medusa 36-60-2200 and Grim L40x57 prop are below.

Strut depth was set at 1 1/8". She was chine walking something fierce... I think I need a smaller prop for this motor. She was still fast as she danced across the lake
The L38x55 and x440/3 should arrive tomorrow. I going to try tweaking my setup to see if I can eliminate the chine walk with this prop while I wait for the other props to arrive.

[Jeff Wohlt]

Wow...54 mph! I think that is the fastest I have heard of...not including Brian's run.

How was the heat and all that?

[Capt. Crash]

54mph....cool man!

Where was that 200+ temp at?

The chine walk may be that fin. More weight up front may help with it.

It's looking like a rain out here for the whole weekend....and I'm just about to bust to try out my new setup....RATS!

[LuckyDuc]

Sorry, forgot to label the temp locations...

High Temp A = Motor can
High Temp B = ESC to Battery bullet connector
High Temp C = Motor lead bullet connector (205.7 degrees)

I plan to fiddle with the strut and turn fin on the next runs to see if I can reduce the walking. It's going to be awhile before I have the new test props balanced and sharpened anyway, so I might as well see if I can get the L40x57 tweaked better.

[Jeff Wohlt]

Love the stats but how do you feel about the motor in general?

[jingalls007]

Awesome! 54 mph is fast on the water. Now with the extra KV and the 38X55 I would raise the strut a bit more. The lifter prop's liked the strut at 1" for me, handled better ran cooler at 1" then at 1 1/8". How did she handle in the corners?

[LuckyDuc]

Love the stats but how do you feel about the motor in general?

I like it. This is not my first Medusa motor though. I have them in two of my EDF jets.

[LuckyDuc]

Awesome! 54 mph is fast on the water. Now with the extra KV and the 38X55 I would raise the strut a bit more. The lifter prop's liked the strut at 1" for me, handled better ran cooler at 1" then at 1 1/8". How did she handle in the corners?

It was chine walking everywhere with the L40x57. I think that prop is too much for that level of rpms and the hull.

[jingalls007]

I think your right, AND maybe even a X637 or X642 int he future? Isn't this sport/hobby fun, constant things to try out and tinker. so many props, so little money.

[Darin Jordan]

... so many props, so little money.

SOOO many tweaks you could do to your EXISTING prop to find out that it WAS the right one after all!

[jingalls007]

SOOO many tweaks you could do to your EXISTING prop to find out that it WAS the right one after all!

Like??

the mo' knowledge the mo' betta'

[LuckyDuc]

Octura x440 test

I got around to testing my Octura x440 3 blade prop with the Medusa.
The best strut depth setting for this prop seemed to be 15/16" below the hull.

In short, it had a much higher average lap speed than the L40x57 prop (43mph avg), but had a 2mph slower top end. Temps, Amps, and Watts were much higher though. As you can see by the increased avg lap speed, it was much more stable on the water than the L40x57.

I may de-tongue the x440 to see if I can squeeze a little more speed out of it.

BTW. The Grim L38x55 was the worst of the 3 props I've tested so far with the Medusa. It was VERY unstable. I tried many different setups, but it didn't help with this prop.

x440 stats/chart below.
Temp A = Motor Temp
Temp B = ESC/Battery Bullet connector temp
TEmp C = Motor lead bullet connector temp.