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

**LuckyDuc** · 04-27-2009, 05:55 PM

Originally Posted by Drag Boat Bob

LuckyDuc,

Does the ESC still provide input voltage to the BEC or are you using and external source?

There is a positive and negative lead coming off of the BEC than gets soldered onto the ESC's battery leads. The ESC's receiver wire is then plugged into the BEC, and then the BEC is plugged into the receiver's ESC channel.

**LuckyDuc** · 04-28-2009, 10:47 PM

Data for the Grimracer L42 x 66 is now available. Link

**LuckyDuc** · 05-01-2009, 10:39 AM

I put the Grimracer L40x57x3 back on yesterday and started tweaking my setup. After reading that Detox had his strut set at 1 1/8" I did the same. Bam! She gets right up on plane now. Thanks Detox!

It is SUPER consistent lap to lap and very stable. I’m averaging 40mph now! Check out how consistent it is in the chart.
I also hit 52mph with it on my second run.

**detox** · 05-01-2009, 10:51 AM

You can see on the graph batteries are dropping off and boat is slowing. The new G3 batteries advertise flat consistant discharge before hitting LVC stutter.

**LuckyDuc** · 05-01-2009, 11:21 AM

Originally Posted by detox

You can see on the graph batteries are dropping off and boat is slowing. The new G3 batteries advertise flat consistant discharge before hitting LVC stutter.

Here is a chart of the same run with speed AND pack voltage. The lowest voltage my packs hit under load was 14.33 volts. That is pretty good considering the amp draw on this power system.

All packs loose voltage during use. I'm sure that the G3s have a curve similar to the one in the chart below... it just may have less voltage loss... Hard to say with out testing them.

BTW. I've been running 3 x 4s 2250mAh packs in parallel for a total of 6750mAhs, and a continuous discharge capability of 135amps for the last 2 weeks.

I should have mentioned that sooner in the spirit of full disclosure I guess

**LuckyDuc** · 05-01-2009, 11:40 AM

Pic of my battery layout and mess of wires

Also, the parallel connector I made with 12 guage wire, 5.5mm bullet connectors. This connector stays perfectly cool BTW. The hot temps are coming from the ESC side.

**jingalls007** · 05-01-2009, 11:43 AM

Duc, is the stock controller in there somewhere?

**LuckyDuc** · 05-01-2009, 11:50 AM

Originally Posted by jingalls007

Duc, is the stock controller in there somewhere?

LMAO!!!

Yeah. It's under the rat's nest... just follow the cooling tubes

**detox** · 05-01-2009, 12:08 PM

LuckyDuc, What is the weight of your ready to run UL-1?

**Capt. Crash** · 05-01-2009, 12:20 PM

...that was a 10 lap run right?

Those are very similar results to my runs except I have to pull a full rudder 180 turn at one end of my course that really scrubs off the speed and tortures the turn fin.

Interesting that you are finding more speed at 1 1/8" and I'm going the other way and finding mine at 14-15/16". Must be a difference in the strut angle of attack? I would rather be at your setting because it's a lot easier to get hooked up.

Anyone tried de-tonguing this prop yet?

**LuckyDuc** · 05-01-2009, 12:41 PM

Originally Posted by detox

LuckyDuc, What is the weight of your ready to run UL-1?

6lbs 2.6oz (98.6oz)
For you metric guys... 2.796 kilograms

She looks light as a feather on the water

**LuckyDuc** · 05-01-2009, 12:44 PM

Originally Posted by Capt. Crash

...that was a 10 lap run right?

Those are very similar results to my runs except I have to pull a full rudder 180 turn at one end of my course that really scrubs off the speed and tortures the turn fin.

Interesting that you are finding more speed at 1 1/8" and I'm going the other way and finding mine at 14-15/16". Must be a difference in the strut angle of attack? I would rather be at your setting because it's a lot easier to get hooked up.

Anyone tried de-tonguing this prop yet?

Yes. 10 laps.
Most likely... I am getting more speed than you at 1 1/8" because I have 6750mAhs backing up the voltage.

**Capt. Crash** · 05-01-2009, 01:19 PM

Originally Posted by LuckyDuc

Yes. 10 laps.
Most likely... I am getting more speed than you at 1 1/8" because I have 6750mAhs backing up the voltage.

Rip...that is what I was thinking too...but the specs on the MaxAmp 5250 is pretty impressive.

# 45mm X 138mm X 18mm
# 30C Constant(157.5 amps)
# 60C Burst - 2330 surge watts(315 amps)
# 241 grams
# Water-sealed for all-weather protection
# Comes standard with Hyperion taps
# Comes standard with 12awg Deans Ultra wire
# Highest performance in the industry

I think my prop sharpening skills may have something to do with it too!

**Brushless55** · 05-01-2009, 01:35 PM

Originally Posted by Capt. Crash

...that was a 10 lap run right?

Those are very similar results to my runs except I have to pull a full rudder 180 turn at one end of my course that really scrubs off the speed and tortures the turn fin.

Interesting that you are finding more speed at 1 1/8" and I'm going the other way and finding mine at 14-15/16". Must be a difference in the strut angle of attack? I would rather be at your setting because it's a lot easier to get hooked up.

Anyone tried de-tonguing this prop yet?

What batteries are you running?

**Capt. Crash** · 05-01-2009, 01:50 PM

Originally Posted by Brushless55

What batteries are you running?

a pair of the above Maxamp 5250s.

**jingalls007** · 05-01-2009, 01:55 PM

Originally Posted by Capt. Crash

a pair of the above Maxamp 5250s.

I also run the same and love em', plus the more you order from maxamps the cheaper they get!

**Brushless55** · 05-01-2009, 02:04 PM

Ok well you got the amps for sure..

I just picked up a pair of 5200mah 30/40c batteries and got alittle over 6mph more with them!

**detox** · 05-01-2009, 03:30 PM

I also like Maxamps batteries, but you can buy two of the new Hyperion G3 35c lipo's for roughly the same price of one simular Maxamp lipo.

I just ordered two of these 4s packs for my UL-1, Raptor Rigger, and Brushless Emaxx.
http://www.allerc.com/product_info.p...oducts_id=4550

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

**Capt. Crash** · 05-01-2009, 03:45 PM

What does 25/45C mean?

25C constant/45C burst?

The link is for a 4s 3300mah pack @ $104.00ea...is that the one?

If so, the price is a wash for me cause I get a 15% discount on the $120.00 MaxAmp packs bringing them to somewhere around $100.00 ea.

Those G3s are 5C better and a good deal more amps for 2, but weigh more. A really great looking pack. Let us know how they work.

Next month there will be something even better! Ain't it great!

**jingalls007** · 05-01-2009, 04:09 PM

Originally Posted by detox

I also like Maxamps batteries, but you can buy two of the new Hyperion G3 35c lipo's for roughly the same price of one simular Maxamp lipo.

I just ordered two of these 4s packs for my UL-1, Raptor Rigger, and Brushless Emaxx.
http://www.allerc.com/product_info.p...oducts_id=4550

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

can't wait to see the difference from your 25c packs to these 35c monsters. Video? Please?

**detox** · 05-01-2009, 04:24 PM

Originally Posted by Capt. Crash

What does 25/45C mean?

25C constant/45C burst?

The link is for a 4s 3300mah pack @ $104.00ea...is that the one?

Thats the one. HYPERION G3 VX 14.8V 4S 3300 MAH 35C/65C LIPOLY PACK (4s2p 6600mah)
I will compaire them against my Hyperion G3 2S 5000 MAH 25C/45C. (4s1p 5000mah)

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

**Brushless55** · 05-01-2009, 05:02 PM

Wow! That's alot of juice!

**LuckyDuc** · 05-01-2009, 06:03 PM

Those look like some nice packs. You will definitely see an improvement with 6600mAh 35C packs. You might melt off the insulation on your motor leads though. I did. I'm on my second coating of heat shrink tubing now

**detox** · 05-01-2009, 08:02 PM

I am using Castle's beafier 4mm male bullet connectors on motor wires so maybe heat will not be a problem.

...

**LuckyDuc** · 05-01-2009, 10:31 PM

Cool

Keep an eye on them and you shouldn't have any problems.

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