My Eagle Tree data with m445

[LuckyDuc]

I did a run this evening with my new prop and consistantly ran between 46 - 51mph each lap in race setup.

My motor leads and batt/esc connectors are still getting too hot for my liking.

Here's the eagle tree chart with amps and gps speed... also the Eagle Tree statistics snap shot showing Peak Amps, Peak watts, mAhs used, low voltage, etc.
Temp A is the motor temp and Temp B is the motor bullet connector temp.

My wife took some video... I'll try to post it later.

[Brushless55]

1911 watts!

[LuckyDuc]

Surprisingly enough the stock setup and stock prop is only 26 watts less.

Here is a chart and Stat print out for the "All Stock" setup.

[LuckyDuc]

Here's the video from today's run.

http://www.youtube.com/watch?v=wvRokCeJ8f8

[teach]

Great video. Even better commentary! My boys get just as excited.

[LuckyDuc]

The kids really get a kick out of it... they get super excited.

[longballlumber]

That was a great vid!!!! the Kids were cracking me up...

Personally I don't have any kids, but the first time I ran my boats with my dog around he immediatly jumped in and tried swimming after the boats. That's the last time I took him wiht me....

Boat looks great. I hope to have mine out there on sunday.

[Capt. Crash]

Cool vid...I'm thinking that was a really long run. Seemed like around 2 miles to me. Have ya tried a 1 mile run?

[LuckyDuc]

I'm sure that the temps would be better with normal race distance.
Now I just need to build some buoys and setup a race course. I'm still trying to decide what to use for buoys.

[detox]

This is really good info. Sounds like we need to upgrade to bullet connectors.

BTW...what are the battery specs?

.......

[LuckyDuc]

This is really good info. Sounds like we need to upgrade to bullet connectors.

BTW...what are the battery specs?

.......
Yep. I have some 5.5mm bullet connectors on order.

The batteries are 2 x 4s 2250mAh packs in parallel. They are rated at 20C cont discharge. I'm using these because they are the packs I use in my 70mm EDF jets.

[LuckyDuc]

FYI... I re-posted the Data Chart as the original wasn't enlarging correctly. Now you should be able to see the detailed amps and speed.

[detox]

I wonder if using 35c Lipos would make the UL1 faster?

Check out these new Hyperion batteries:
http://www.allerc.com/product_info.php?cPath=3_4_93&products_id=4553
http://www.allerc.com/index.php?cPath=3_4_93&osCsid=ac8be4cc5340bb67da59039b52a09db8



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[Brushless55]

Wow! 147amps cont.

That should do something! :thumbup:

[LuckyDuc]

Here is the last chart I'm doing with the m445 before switching to a Grim L40x57 for testing. Hit 52mph in the straights.

Check out Temp B. That is the ESC's Deans Connector!:eek:

[detox]

Be carefull...my detunged x645 killed my ESC.

[LuckyDuc]

If it cooks the ESC then others will know not to try it :w00t:
I've been looking at a Hydra 120 anyway:cool:

[Capt. Crash]

52mph...congrats....that is way cool! What was your prop setting? :rockon2:

[LuckyDuc]

The strut is at 1" and the prop is angled down at 2 degrees. Batteries are all the way forward.

[Brushless55]

The strut is at 1" and the prop is angled down at 2 degrees. Batteries are all the way forward.

Ok, I think I know what the 1" at the strut means, but what or how do you get the 2* prop angle? :help:

[detox]

Ok, I think I know what the 1" at the strut means, but what or how do you get the 2* prop angle? :help:

Lowering the strut will usaully put the needed angle on the strut. Using a setup board you should see light under the front edge of strut. 030" clearance will work. Some have used more in the UL1 with good results . You just have to test

[Brushless55]

Does lowering the strut loosen the boat up?

[LuckyDuc]

Lowering the strut helps stabilize the boat by lowering the nose of the boat. If it is running too wet then raise it a tad.

[Brushless55]

Here is the last chart I'm doing with the m445 before switching to a Grim L40x57 for testing. Hit 52mph in the straights.

Check out Temp B. That is the ESC's Deans Connector!:eek:

Does your cool Eagle show RPM ? :buttrock:

[LuckyDuc]

It can, but I don't have that sensor. I have the two temp sensors and the GPS expander.
I could give you a chart with voltage and you could estimate RPM using math.

Motor KV (2030) x voltage = RPMs

[Brushless55]

But under a load would be different...

[LuckyDuc]

It wouldn't be as far off as you think because voltage drops as well when load is applied.

[detox]

I hope your newly sharpened L40 X 57 prop goes faster. Please post Eagle Tree numbers and speed afterwards.

[Brushless55]

It wouldn't be as far off as you think because voltage drops as well when load is applied.

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.. :biggrin:

[LuckyDuc]

I hope your newly sharpened L40 X 57 prop goes faster. Please post Eagle Tree numbers and speed afterwards.

Will do. The weather has been cruddy for the last couple of days.

[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.. :biggrin:

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! :rockon2:

[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.. :thumbup:

[LuckyDuc]

I posted my initial eagle tree data on the grimracer L40x57 here (http://forums.offshoreelectrics.com/showthread.php?t=7486)

[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.

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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.

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[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.