Miss Geico Race Prep

[blackcat26]

Bracket is home made with some 1/16 angle I bought at a hardware store. 1512 too much? Come on now, you need some real batteries!

[JackBlack26]

are the speeds about the same between the two motors?

They seem the same, but I have no GPS on hand. I can tell you that the outrunner makes it jump out the water at full throttle from a dead stop and the 1512 doesn't.

A member of another forum was running the same boat this weekend with a UL1 2030kv motor and NanoTech LiPos and we were neck and neck. I run a 42x55 prop and he runs a composite prop from OSE, but didn't get the number of his prop. I'm settling on the outrunner. No 1512 for me
Here is some video of that our Geicos playing together. The boats seem pretty well matched, considering the motor KV difference and my cheap 20C LiPos compared to his NanoTech LiPos. My boat is the one on the inside that crosses to the outside in the beginning.

http://www.rcgroups.com/forums/showpost.php?p=17048000&postcount=3819

[JackBlack26]

Bracket is home made with some 1/16 angle I bought at a hardware store. 1512 too much? Come on now, you need some real batteries!

I do need real batteries and I'll be getting some 40C LiPos this week. But in size reference and weight compared to the performance of a CC outrunner, yes it's too much. The outrunner keeps the boat nice and light, while keeping amp draw down, but that's just my opinion from experience with both motors in this boat.

Run whacha' brung, and have fun!

[blackcat26]

I bought my 1512 to run on 6s. I was just playing around with props to see the difference in speed between 4s and 6s. My fastest was 58mph on 6s and didn't test much on 4s.

[JackBlack26]

58mph, nice! After speeds like that why run 4s, right? I wouldn't.

[blackcat26]

Well I was trying to see if a big prop could beat high rpm's. So far I still like high rpm's!

[JackBlack26]

So, 1800kv isn't too much for 6S, considering the small prop? Does the boat stay pretty stable at that speed?

[blackcat26]

Yes it is a lot of rpm's but using a small prop like a m440 I had no issues. Not too bad stability wise at those speeds.

[Brushless55]

They seem the same, but I have no GPS on hand. I can tell you that the outrunner makes it jump out the water at full throttle from a dead stop and the 1512 doesn't.

A member of another forum was running the same boat this weekend with a UL1 2030kv motor and NanoTech LiPos and we were neck and neck. I run a 42x55 prop and he runs a composite prop from OSE, but didn't get the number of his prop. I'm settling on the outrunner. No 1512 for me
Here is some video of that our Geicos playing together. The boats seem pretty well matched, considering the motor KV difference and my cheap 20C LiPos compared to his NanoTech LiPos. My boat is the one on the inside that crosses to the outside in the beginning.
http://www.rcgroups.com/forums/showp...postcount=3819

Looks like the UL-1 powered had some balls and was pulling away..
I was thinking another thing that maybe the 1512 did not work like others think it should is the timing.. maybe the timing on the esc is wrong for the motor?
just a thought
and those 20c packs, I have some for my 3D planes and I actually like them more than the Nano packs I have

[JackBlack26]

The UL1, Ammo motor, does have balls. I was quite surprised when he said, "oh, my boat is stock", lol! There was no one out there for retrieval so I was being cautious on the turns which is why he kept in front of me. I didn't want to flip mine. He was hitting the turns balls out! You can definitely tell the few extra RPMs make a difference though.

The only time I have had a problem with the 5K mah 20C packs is when they get over drawn by just a bit. They ether puff or will not hold amperage anymore. Not too big of a margin of error at all! For the price difference, $6.42/pack, I'm going with the 40c packs next.

[Brushless55]

The UL1, Ammo motor, does have balls. I was quite surprised when he said, "oh, my boat is stock", lol! There was no one out there for retrieval so I was being cautious on the turns which is why he kept in front of me. I didn't want to flip mine. He was hitting the turns balls out! You can definitely tell the few extra RPMs make a difference though.

The only time I have had a problem with the 5K mah 20C packs is when they get over drawn by just a bit. They ether puff or will not hold amperage anymore. Not too big of a margin of error at all! For the price difference, $6.42/pack, I'm going with the 40c packs next.

those UL-1 motors are bad ass.. you can see that thing pull from you in the straights

and your packs, bro don't go below 20% left in them and they will last a long time
even if you get the 40c packs and you overdraw them, they will puff

[JackBlack26]

I didn't mean to over draw them in voltage(MAH). I meant they were overdrawn in amperage(20Cx5000mah). I'm comparing a 100A(20c) discharge rate battery to a 200A(40c). There is actually no comparing them. Hands down the 40C battery "should" last longer.

Like I mentioned, I don't have a data logger but judging by temperature, the 1512 draws more amperage which is why I believe I killed them.

[Brushless55]

I didn't mean to over draw them in voltage(MAH). I meant they were overdrawn in amperage(20Cx5000mah). I'm comparing a 100A(20c) discharge rate battery to a 200A(40c). There is actually no comparing them. Hands down the 40C battery "should" last longer.

Like I mentioned, I don't have a data logger but judging by temperature, the 1512 draws more amperage which is why I believe I killed them.

Oh gotcha, the 1512 got to em..

do you know what the timing on the esc is set to?

[JackBlack26]

ESC is a T180 and the default is 15*. I was running the same timing for both motors. Just checked and charged my batteries and it only got 1. The voltage is low at 4.7 and 4.8/cell while the others hold 4.24/cell. I'll keep that pack to run in my Widowmaker rescue rig

[Brushless55]

ESC is a T180 and the default is 15*. I was running the same timing for both motors. Just checked and charged my batteries and it only got 1. The voltage is low at 4.7 and 4.8/cell while the others hold 4.24/cell. I'll keep that pack to run in my Widowmaker rescue rig

15* is to much for the 1512
your volts are 4.7 and 4.8 per cell?
lipo charge to 4.2 volts per cell