My Eagle Tree data with m445

[LuckyDuc]

Yes voltage does drop under load, but you cannot just multiply volts (4s) times kv to get your top rpm under a load...

I have a 60 size Cap 232 with a 500kv motor.. On 6s it will spin well over 11k free, but with a 16x8 prop my rpm is around 8k..
So by your math I'm only at 16v but in reality my batteries only drop about 1.5v..

Here is a graph I made of the stock setup/prop when I had the Brushless RPM sensor hooked up. I've since removed it from the boat because it was eating up RAM on the logger, and I didn't feel that the data was as relevant as the other sensor data.

[Brushless55]

Very cool LuckyDuc..

that's just the iinfo I was wondering about!

[LuckyDuc]

Anyone have some suggestions on other props to test in this size range?
I don't want to goto a 6 series type prop after reading about over amp issues with the ESC.
I was considering a Prather S220 next after testing the Grim L40x57x3.

[jingalls007]

Detox likes the Grim L38X55, he also suggested the L38X63.

[bigpapa]

still has the stock motor ?????????

[LuckyDuc]

still has the stock motor ?????????

Yep. The only changes I made are the prop and strut depth/angle.

jingalls007,
Do you race with the guys from Longmont and Greeley? I just moved to WI from Denver. I used to run my Shockwave 36 in Longmont at the county building lake.

[jingalls007]

WHAT?? No, I have only run my gassers at a Lake just off I-70 and Colorado Blvd. near Commerce City. I run my FE's at Wash Park since I live so close. It takes me 3 minutes to get to Wash Park, it's awesome. Do you have those dudes contact info, would be nice to run my FE's with some other dudes this summer here. thanks man,

Jarrett

[LuckyDuc]

PM'd you.

[Brushless55]

Yep. The only changes I made are the prop and strut depth/angle.

jingalls007,
Do you race with the guys from Longmont and Greeley? I just moved to WI from Denver. I used to run my Shockwave 36 in Longmont at the county building lake.

I'm only 10 min from that place, have yet to run there..

[detox]

Here's three of my Grimracer props. Two props on right have been hardened. I will do a comparison soon.

From left to right L40 X 57, L38 X 55, L38 X 63

[LuckyDuc]

Nice looking props. What do you charge?

[Brushless55]

Here's three of my Grimracer props. Two props on right have been hardened. I will do a comparison soon.

From left to right L40 X 57, L38 X 55, L38 X 63

Awesome, we want to know how they compare. let us know..

[LuckyDuc]

I posted my initial eagle tree data on the grimracer L40x57 here

[jingalls007]

Here's three of my Grimracer props. Two props on right have been hardened. I will do a comparison soon.

From left to right L40 X 57, L38 X 55, L38 X 63

did you get a chance to run the 38x63?

[tharmer]

How do you harden a prop?
-t

[detox]

How do you harden a prop?
-t

A really sharp prop is thin and easy to bend along the sharp edges so I heat treat. I bake my props at 600 degrees for 2 hours then let them cool slowly over night.

.................................................. .....................

Originally Posted by raptor347
I've done it a couple ways.

#1. If you really want them HARD: Anneal them at 1225F for an hour and quench in water. Do all you prop work: sharpen, balance, thin, cup etc. Then 600F for 2 hours and turn off the kiln and just leave them to cool overnight. This yields very hard props, but you can no longer work them at all.

#2. Just do the 600F step after yo work the prop. Still very hard, but you canbend them a little if you really need to.

[LuckyDuc]

I took a break from balancing and sharpening my next test prop, a Grimracer L42x66, and decided to run my M445 again.

Apparently my driveline has loosened up a bit and is now broke in. I hit 55mph and it is pulling a lot less amps than prior testing. Data below.

[detox]

dayuuuum that is fast. I will have to try my m445 tomorrow.

.................

[detox]

Apparently my driveline has loosened up a bit and is now broke in. I hit 55mph and it is pulling a lot less amps than prior testing. Data below.

Looser/faster water conditions will help pull less amps and make boat faster also.