aeromarine 36 sprint cat twin drive suggestions

[hiboatah]

Brought this bare hull out from storage and would like to start building it as a twin motor set up. i have a few questions:
*36mm or 40mm motors. 2K kv / 6S?
*where do I purchase the motor mounts from
*I'm finding it almost impossible to mount the motors and drives in the sponsons. do we normally set up the aeromarine hulls with over the tunnel motor mount and drives?
*if for some reason some of us has been able to mount the motors and drives in the sponsons is there an advantage to this. struts out the sponsons or struts hanging off the transom dropping into the tunnel
*lastly, based on how much this sprint cat will weigh and the shaft rpm, what will be a ball park propeller to run

thank you in advance - Kyle

[TRUCKPULL]

Kyle- here are some pictures of mine, Twin TP 4050 - 1570KV , two Turnigy 180A ESC's
Two 6S - 5000 70c -140c batteries, two Hitec -HS-5645MG servos (push-pull),
Two ABC - 1815-17-45 props Left and right.

GPS - in race setup at 77 MPH.

Larry

[hiboatah]

Thank you for sharing your set up with me Larry.

You got so much room in there.

I hope there's not a performance difference having the drives out the sponson vs drives out the tunnel. On the sprint cat there is NO room to access motor mounting in the sponson unless you cut the deck back and also cut the rails down. (shorter). In addtion to that, on the sprint cat you have all kinds of room on the transom to hang a lot of stuff. So it seems the logical thing to do on the sprint cat (36 that is)
Also, 36mm or 40mm motors - a setup that will not overwhelm this craft
Also where do you purchase these motor mount from. I see Steven has one to purchase in the online store. Does this mfg make one for 36mm twin motor setup?

[TRUCKPULL]

Motor mount, - cut it to fit from carboard, trace it on to your mount material, cut it out and fiberglass it in.
The ones in this boat are made from aluminum. I am looking to use carbon fiber on my next boat, A little bigger boat.

Putting the motors and batteries in the sponsons is a lot better. Lower center of gravity.

Larry

[ray schrauwen]

These work too. I have a metal one that's really old.

https://www.youtube.com/watch?time_c...ture=emb_title

[hiboatah]

Thank you Guys for your inspiration.
Just to hear/see of your accomplishments and validation for my ideas are encouraging enough
Measured the 36 with water jacket...it barely makes it between the deck and tub. In this case, the rails need to be cut off.
Ray, nice shape contour gauge! He he...need a small one in this case to make the motor mount outline
Well...I'll get started.
Thank you very much boaters

[Mike snell]

Kyle- here are some pictures of mine, Twin TP 4050 - 1570KV , two Turnigy 180A ESC's
Two 6S - 5000 70c -140c batteries, two Hitec -HS-5645MG servos (push-pull),
Two ABC - 1815-17-45 props Left and right.

GPS - in race setup at 77 MPH.

Larry

Hey how are you doing my name is Mike I?m running a 51 inch Hellcat with swordfish 220s And I?m also running to 5000 100c Graphing Packs And I was just looking at your set up I was wondering if hooking the batteries in parallel on the two ESC is the way that you have done do you find that it runs better than having everything separated

[TRUCKPULL]

Hello Mike
I do believe that wiring the ESC's so the they each see 6S-2P is the way to go, Both batteries are always the same voltage.
When wired separately you will always have one battery lower then the other at the end of a run, and have to hold the rudder one way or the other to go in a strait line.
You may have to but a plug in the black wire, to disconnect the two ESC's from each other, for when programing them.
With the two Turnigy ESC's I hade no problem. On another boat with Castle ESC's I had to use a plug and program each one separately.


Larry

[Mike snell]

Hello Mike
I do believe that wiring the ESC's so the they each see 6S-2P is the way to go, Both batteries are always the same voltage.
When wired separately you will always have one battery lower then the other at the end of a run, and have to hold the rudder one way or the other to go in a strait line.
You may have to but a plug in the black wire, to disconnect the two ESC's from each other, for when programing them.
With the two Turnigy ESC's I hade no problem. On another boat with Castle ESC's I had to use a plug and program each one separately.


Larry

OK one more question when you say 6s-2p you mean 6S parallel

[TRUCKPULL]

OK one more question when you say 6s-2p you mean 6S parallel

YES
6S-2P means 2 in Parallel 6S packs

Mike did you used to live in MI.?

Larry

[Mike snell]

YES
6S-2P means 2 in Parallel 6S packs

Mike did you used to live in MI.?

Larry

Cool thank you I had a camp and Jordan River Estates

[hiboatah]

That's a good point about running the twin 6S-1P as separate motor systems vs 6S-2P shared power to both motor systems Larry.
Would there be less of a uneven propulsion effect if the cat were to have the twin motors mounted on the tunnel closer to each other vs spread apart mounted in the sponson. If so, there is a benefit mounting the twin motors high and close. It would be more tolerable to drive due to uneven propulsion caused the the 6S-1P power set up. Just thoughts setting up my sprint cat 36. Still contemplating if the big effort mounting the motors low will have that much more of a benefit.
Kyle

[jaike5]

Make it a single motor setup ...... half the issues !!

[TRUCKPULL]

That's a good point about running the twin 6S-1P as separate motor systems vs 6S-2P shared power to both motor systems Larry.
Would there be less of a uneven propulsion effect if the cat were to have the twin motors mounted on the tunnel closer to each other vs spread apart mounted in the sponson. If so, there is a benefit mounting the twin motors high and close. It would be more tolerable to drive due to uneven propulsion caused the the 6S-1P power set up. Just thoughts setting up my sprint cat 36. Still contemplating if the big effort mounting the motors low will have that much more of a benefit.
Kyle

Both motors and batteries in the sponsons - lower CG and turns faster and flatter.
6S-2P shared power is so simple to do - It should be a NO brainer.

Larry

[TRUCKPULL]

Make it a single motor setup ...... half the issues !!

Jay
I guess you missed the "Q" Cat race between Mike, Tom, and myself at 50 Point.

Larry

[jaike5]

how did that race run with a five boat minimum ???
J.

[TRUCKPULL]

how did that race run with a five boat minimum ???
J.

By the third heat, two boats had dropped out.

Larry

[hiboatah]

tnx Larry
I don't like choices
Especially when the favorable choice entails a whole lot of work
The enticing thing is...the results are logically favorable
Amen Jay...life could be a whole lot easier but considering this is an extremely cool hobby, getting up in the morning each day looking forward to building a single would not be as purposeful as building a twin. no offense pls.
I'm going get building - tnx guys
btw rocketman and his cronies (Hansen Dam) inspires me to build this

[jaike5]

No offence taken ! Cool hobby is right on! I would rather build two boats than put double $ in one ! Raced with one in FLA. could only keep up couldn't pass him, cool boat though, and quick.
Cheers, Jay.

[T.S.Davis]

Larry's cat is disturbingly fast. Absoutelyly violently fast. I'll vouch for it. Might be the fastest heat cat I've ever seen.

Haha....If Larry had a youngsters eye balls it would be really tough to beat.

[TRUCKPULL]

Larry's cat is disturbingly fast. Absoutelyly violently fast. I'll vouch for it. Might be the fastest heat cat I've ever seen.

Haha....If Larry had a youngsters eye balls it would be really tough to beat.

Thanks for the KODOO's Terry.

Larry

[dasboata]

I am building the 36? Avenger same bottom as the sprint but more room inside going to run 4060 on 6 with some water cooled Xlx



Sent from my iPhone using Tapatalk

[dasboata]

Sent from my iPhone using Tapatalk

[TRUCKPULL]

Chris

That is the same hull that I run.
Info on my setup in post #2.

Larry

[dasboata]

Chris

That is the same hull that I run.
Info on my setup in post #2.

Larry

Larry sound like a good runner cant wait to finish it Troy cut it down a bit and built it super strong for me

[hiboatah]

Larry, no need to be humble about all those performance remarks. In picture 3, looks like she's haulin the stuff real good!

Terry, interesting how life serves us...when we are intelligent enough to use the resources, we are handicapped to do so...

Thank you for posting Chris. Looks like you're on your way. Interesting...locate the stinger location...fabricate your flex housing and motor mount angle simultaneously to create the flex housing route (usually w/slight bend)

I'll be getting the contour gauge indicator (that Ray recommended) to create a reverse contour of my sponson. I'm thinking this will be the easiest way to assemble a starting cardboard template for my motor mount.

Pray for me boaters, this is what I'm working with. Will be using 36mm motors as that's all that will be fitting between the deck and tunnel.IMG_1189.jpgIMG_1185.jpgIMG_1187.jpg

[dasboata]

delete