UL-1 Eagle Tree data with Grimracer L40x57 3 blade prop

[LuckyDuc]

I managed to squeeze 3 runs in with my new Grimracer L40x57 3 blade prop.

Initial thoughts on the prop are…
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1. It runs very consistent laps of 45-42mph with much lower average amp draw than the Octura m445 and the stock prop. For reference, the m445 and stock prop data can be found in this thread: Link

2. It is much more difficult to get up on plane than the stock prop and the m445. I found it best to hand launch start with this prop.

3. It took MUCH more file work to get the prop balanced, thinned, and sharpened.

Below is the Eagle Tree data with speed and amp draw for my most consistent heat run.

I will post the fastest run data (47mph) in the next post.

[LuckyDuc]

Run #2

This is the fastest run so far with the L40x57.

[Darin Jordan]

This is the fastest run so far with the L40x57.

I think you may want to stick with the other prop... looks like this one was faster in the straights, but your average speed dropped off quite a bit... Prop isn't getting you off the corners as hard and is dropping off more in the turns, from what I can tell with a quick look at the data...

Gotta LOVE this EagleTree data...

[detox]

Gotta LOVE this EagleTree data...

What he said. Big Thanks!


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

[LuckyDuc]

Happy to contribute.

Next on the testing block will be the GrimRacer L42 x 66 and the Prather S220.
The Prather may cook her in normal race setup. .... Good excuse to upgrade the ESC I guess.

**** As a disclaimer I should mention that I'm using an external 6v ParkBEC to take the step down work off the stock ESC.

[longballlumber]

Happy to contribute.

Next on the testing block will be the GrimRacer L42 x 66 and the Prather S220.
The Prather may cook her in normal race setup. .... Good excuse to upgrade the ESC I guess.

**** As a disclaimer I should mention that I'm using an external 6v ParkBEC to take the step down work off the stock ESC.

WOW... both of those will be alot of prop... I am going to try the L38X55 this weekend for heat racing.

[Drag Boat Bob]

Happy to contribute.

Next on the testing block will be the GrimRacer L42 x 66 and the Prather S220.
The Prather may cook her in normal race setup. .... Good excuse to upgrade the ESC I guess.

**** As a disclaimer I should mention that I'm using an external 6v ParkBEC to take the step down work off the stock ESC.

You may have to name your boat, "Smoke On The Water"...

[Darin Jordan]

Just keep in mind, guys... the UL1 system is NOT an SV27 or BJ26 system... it will NOT take as much prop as those other two setups... it's working with RPMs as opposed to torque... Take it too far and "Puff"...

[Drag Boat Bob]

On the positive side, LuckyDuc is willing to push the equipment to the limit (which all real racers do) and identify the weakest link... Information that some of us would like to see

[LuckyDuc]

So far I haven't pushed the power system beyond that of the stock prop setup. Below are the stats for the stock prop.

The L42x66 may be the limit though.... We shall see what happens
If it does go into melt down I will make sure to dub Smoke on the Water into the video

I should be testing more heat oriented props, but this is more fun

[longballlumber]

Having fun is the best part!!!! Thanks for sharing all of you data.

[detox]

There will be no smoke. It will just die on water. Swollen Capacitor.

[Drag Boat Bob]

There will be no smoke. It will just die on water. Swollen Capacitor.

Detox, when you popped a cap, did you replace your ESC with the same one?

Also, can you get inside the stock one?

[detox]

Detox, when you popped a cap, did you replace your ESC with the same one?

Also, can you get inside the stock one?

Aquacraft sent me a new esc.

Old damaged Stock ESC in photo has rubber coating on ends of a hollow rectangular cooling jacket.

[Drag Boat Bob]

Aquacraft sent me a new esc.

Old damaged Stock ESC in photo has rubber coating on ends of a hollow rectangular cooling jacket.

I'm sorry; I meant can you get to the electronic/circuit board components inside the ESC?