Twin HOTR Options, need help from you smart people!

[Diesel6401]

Just bought a Apparition twin from the SS and need some help choosing motors. I did a search have found most folks running the Feiago 380xl's on these hulls and the ekos hulls, but I don't want to go that route. I do have a question though will a 540 36mm can fit? I know Bill O upgraded his EKOS to 540 cans by just modding the motor mounts, just curious if anyone has tried it with the apparition hulls. I know the ekos hull is a little bigger though. I will be replacing the 4mm bushings on the strut with some 3/16 aeromarine bushings and I will use .150 3/16 flex cables that I already have (the cw mg cable and the replacement ccw mg cable).

A) Leopard 2860 2730kv on 3s
B) Leopard 3650 2930kv on 3s
C) Ammo 3650 2300kv on 4s
C Ammo 3656 2600kv on 3s/4s
D) Ammo 2845 2700kv on 3s

Esc's would be twin seaking 120s.

Another question is should I run isolate each esc and battery or should I parallel the esc's and parallel the batteries on 3s and if I ran a 4s set up should I parallel the esc's and run 2 2s batts in series or parallel the esc's and run 2 4s batts paralleled?

[LarrysDrifter]

Id definitely not run a 2 pole motor.Stick to a Leopard or other decent quality.I ran my EKOS on Feigao 380XL's 2612kv on 4s.Ran cool,but just lost a motor recently too.Im re-building using Arc motors from www.lightflightrc.com. My friend has an Apparation,and by looking at our 2 hulls,they seem to be the same in the sponsons as far as room goes.And Arc 540 motors have 25mm and 19mm bolt patterns too.You can also use more rpm than what you posted in the poll as far as the Leopards go.Or prop up.32,523 isnt much for a twin drive.

[blackcat26]

Me personally would use the ammo 2600's or the turnigy 36-56-04 2600kv. I ran both of those motors in my blackjack twin and the both yeilded exactly the same speed. (right under 70mph) run em on 4s (2 2s in series) and the speedys in parallel so each motor see's the same voltage. Same setup in my Miss Geico twin ran 66mph on x442's on 4s.

[tiqueman]

Diesel Diesel Diesel.. Dont you remember my twin HOTR build thread.. Cmon man.. I thought you were better than that...

http://forums.offshoreelectrics.com/...ad.php?t=13290

Twin 540s, 10XL, 6S, just over 70mph.


EDIT, oh theres more... I got excited and posted too soon... Mine is wired as Blackcats, 2-3S, seriesed to 6, the paralleled out to the EScs, BUT, if you run 4S or even 3S per motor, obviously theres enough room so run it to each seperately so youll get a longer run time. I actually just purchased two 4S 4000mah 40C packs that will just fit under the deck lip that Im going to run mine on. 70 is cool, but for the 1:30 sec saw runs, it will be alot more fun a little slower. My test runs will be this weekend on the new power provided the weather holds up.

[blackcat26]

Maybe he does not want to go over 70.....

[tiqueman]

Knowin Deisel, he wants more

[blackcat26]

Yeah I have that same bug it seems.....

[Diesel6401]

Diesel Diesel Diesel.. Dont you remember my twin HOTR build thread.. Cmon man.. I thought you were better than that...

http://forums.offshoreelectrics.com/...ad.php?t=13290

Yes I do remember that build come to think of it.

Maybe he does not want to go over 70.....

Good question

Knowin Deisel, he wants more

GREAT ANSWER

[Diesel6401]

Id definitely not run a 2 pole motor.Stick to a Leopard or other decent quality.I ran my EKOS on Feigao 380XL's 2612kv on 4s.Ran cool,but just lost a motor recently too.Im re-building using Arc motors from www.lightflightrc.com. My friend has an Apparation,and by looking at our 2 hulls,they seem to be the same in the sponsons as far as room goes.And Arc 540 motors have 25mm and 19mm bolt patterns too.You can also use more rpm than what you posted in the poll as far as the Leopards go.Or prop up.32,523 isnt much for a twin drive.

So I looked at the arc motors and im really liking the 36-55s. I like the 2800kv but for 3s its going to get me in the 31k range and you say thats not enough for twins and 4s is over 40k so is 40k to much on twins or what kv rating should I get? The dual bolt pattern me likes a lot.

The leopard 2730 on 4s would yield around 39k, so better on 4s then 3s for this twin?

[Diesel6401]

The arc 36-55 1850 on 5s or 6s is looking good, I'm looking for saw style runs on this. Run time isn't a issue, but temps are a concern. Looking a x442 & x447s, but will start with cf40s & cf45s, not sure how the 55mm will handle a x447. The 36-65 2080 on 5s is another choice. I'm so confused lol....

[tiqueman]

From several discussions w/ Mudl, 55 length cans arent going to do what you want them to. From his findings, the difference between that size can in a BJ26, compared to a HOTR hull is A LOT of mph. I was going to put 3655 size motors in mine and he talked me out of it.

[forescott]

My ekos runs 38,600 unloaded rpms on 380- xl motors(2612kv) I only run it a few minutes at a time but they don't get hot. I think you can get away with pretty high kv motors on a twin cat. The load split between two motors allows for more rpm than the typical single setup.

[forescott]

I ran the ammo 2845's in the ekos on 4s. It ran pretty good. The feigao 380-xl's are pretty impressive too. Could be another option!

[Diesel6401]

From several discussions w/ Mudl, 55 length cans arent going to do what you want them to. From his findings, the difference between that size can in a BJ26, compared to a HOTR hull is A LOT of mph. I was going to put 3655 size motors in mine and he talked me out of it.

We all know how mudl's twin projects go, so with that being said i will not go with the 55mm can's lol, I do want to try to go with the arc motors though, I have never owned one before and kinda interested on trying them and I think the dual motor mount range is cool. How do you feel about the 36-65 can? The 2080kv on 5s will put me around the 38k range. So we can see the page I am looking at, it was listed in above post but I will re-list http://www.lightflightrc.com/

I ran the ammo 2845's in the ekos on 4s. It ran pretty good. The feigao 380-xl's are pretty impressive too. Could be another option!

Trying to stay away from the Feigao's though I would go with the leopard 380s as my fall back choice.

[LarrysDrifter]

I'm starting a build thread very soon with a 32" cat to replace ekos.I will be using Arc 36 55, 2800kv twins.ill be the test piggy for these motors.rpm will be 41440 on 4s.should run at least 65mph or so with the right props.