R these the correct motors for a Genesis Twin?

[crrcboatz]

I received a genesis in a trade last week. It has been converted to a twin setup using these motors. They are FSD 36x74x2700kv.

Should I keep them or change to something else? The boat has counter rotating x437 2 blades left and right rotating. Is that a good prop match up for these motors?

Help & input appreciated.

The install job is not very good so whatever I do with regard to the motors I will redo the mounts, and stuffing tubes for sure.

Also what is a good cg for a twin setup in this boat? It has these stingers on it:

http://fightercatracing.com/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=39&category_id=21&option=com_virtuemart&Itemid=1

[tiqueman]

Not the set up Id choose, but it would work. Id think the prop size would be about correct, but the boat certainly could use some larger props to get it moving. That being said, I wouldnt run larger props on those motors. Is it running 4S?
As for CG, start around 30% and adjust from there. Measure from the back of the sponsons, not the transom.
Sorry I cant give more of a (this is exactly what it needs... ) as I havent built my twin Genesis yet.

[crrcboatz]

Ok, well what r the motor options I should consider? I posted these because the boat came with them. What is a typical twin motor setup using for motors?????

Have already stripped the mounts out of the boat so I can go back with whatever the boat needs in the way of motors, mounts, etc.

Also, these motors being 2 pole and 2770kv would not want to push them with 4s That would put them in the 40,000 + rpm area and not many motors can survive that in addition to the strain on esc and batteries.

[tiqueman]

I wouldnt say that there is a "typical" set up, it really depends on what your personal preference is, How fast you want to go, betteries you may already have, budget, etc etc.

Im going to set my twin Genesis up w/ Leopard 4074 motors. Probably the 2200KV motors on 4S each, mainly because I have the batts and one of the motors. I will more than likely use the Seaking 180 escs.

Ive got a twin HOTR 32" cat that was running twin 540XL Feigaos, 10XL on 6S and breaking 70. Ive also got a twin HPR 45" cat running Castle 1520s on 6S approaching 80mph. I want my Genesis around 50 to mid 50 and I feel the motors Im puting in it will acheive that. Maybe even a bit more.

[6sHyper]

Tique, all those boats sound awesome!! I bet those twin 4074's will surpass your goal and then some too. Another option for someone on a budget is obviously the Tacons or the Keda's Steve is stocking now.

Question, did you have those 10xl's on 6s each?? I know so many people gave me crap about pumping 6s thru my single 10xl in my 32" cat, but it ran very well, broke 60mph.

[crrcboatz]

I have 120/240 seaking escs on the way, have 3 180 seakings in house now. Plan to use the 120s in this boat. So do I chunk these or r they good for anything?

I have about any combo of batteries through 6s.
2- 3s11.1 nano turnigy 40-60c nib

4- 5s 18.6 nano turnigy 4-90c nib

2- 6s 22.2 hyperion 35-60c packs

6- or more 4s 14.4 packs from 25-35c good used packs from my 1/8 scale car.

May consider 2 40x60mm leopards???

This is as all my boats going to be a sport only. 50-60 would be just fine.

[HYDROJERRY]

Never chunk anything bro,,,i find you can always find something to use the old stuff in or throw them on the for sale section and let someone else benifit from what you cant use,,,matter afact i got some stuff i need to put on there,,PS im not good with the electrical stuff but from what i have been seeing the Leopards would work well and if Tiqueman advises on them id go with them for sure,,,Scott nos his SH-T....

[tiqueman]

Tique, all those boats sound awesome!! I bet those twin 4074's will surpass your goal and then some too. Another option for someone on a budget is obviously the Tacons or the Keda's Steve is stocking now.

Question, did you have those 10xl's on 6s each?? I know so many people gave me crap about pumping 6s thru my single 10xl in my 32" cat, but it ran very well, broke 60mph.

Yes, they were seeing 6S each. BUT, 6S on twins and 6S on a single is two different things. I ran modded 442s, cupped, detongued, slightly thinned and pulled about 90A peak during my runs. A single set up would of pulled a lot more and stresses the components well more than I would have wanted to. You can get by with a little more forgiveness w/ twins. Thats why people gave you crap about it.

I have 120/240 seaking escs on the way, have 3 180 seakings in house now. Plan to use the 120s in this boat. So do I chunk these or r they good for anything?

I have about any combo of batteries through 6s.
2- 3s11.1 nano turnigy 40-60c nib

4- 5s 18.6 nano turnigy 4-90c nib

2- 6s 22.2 hyperion 35-60c packs

6- or more 4s 14.4 packs from 25-35c good used packs from my 1/8 scale car.

May consider 2 40x60mm leopards???

This is as all my boats going to be a sport only. 50-60 would be just fine.

Personally, I would not go w/ a 60 length motor. For the size hull, even though its twin, for ease on equipment etc, go w/ an XL size. You could even do the 36mm dia. cans if you wanted, but keep it in the min 74mm range. Im not saying they wont do it, they may just hit thier wall a bit sooner than you want. And with as many 4S packs as you have, sounds like to 2000 or 2200 KV is the way to go. I would recommend the 180A controllers over the 120s, just for head room, but the 120s I think would get you by, just keep an eye on it the first few go arounds. Start out w/ 442s and youll be scootin for sure. If youwant to be absolute sure you keep under 120 and are set on using them, go with a lower KV motor. Just for reference, I run the 4082 Leopard 2200KV in a P-mono (32" hull) and am running 51mph on a M445. My personal experience so far w/ twins is gaining at the least 10mph going to twins. So, if your only wanting 50, keep it a lower KV, then, if you do want it to run like the wind, add another cell and be amazed.

Never chunk anything bro,,,i find you can always find something to use the old stuff in or throw them on the for sale section and let someone else benifit from what you cant use,,,matter afact i got some stuff i need to put on there,,PS im not good with the electrical stuff but from what i have been seeing the Leopards would work well and if Tiqueman advises on them id go with them for sure,,,Scott nos his SH-T....

[crrcboatz]

Ok you mentioned the possibility of using the 36 mm xl can size well that is what the motors I have now are. They are 74mm long and 36 mm dia. The are however 2 pole motors vs the 4 pole leapords and a higher kv of course.

So look at the 36mm by 74mm leopards, 42x 74s. and consider a lower kv of 2000 or 2200.
I do have a couple of align 1650 kv that are outrunners and are 44 mm by 65mm like these

http://cgi.ebay.com/Align-KX860008A-600XL-Brushless-Motor-1650KV-New-/180618055294?pt=Radio_Control_Parts_Accessories&hash=item2a0dacce7e

new never used and mounts for them too. Would they be too much? On 5s these produce 1600 watts each. Maybe these would be too much x 2 cause that is 3200 watts total????????
Wonderful motors by the way.

Please let me know what you think on them if possible.

[tiqueman]

Yeah, your FSDs would be better had they been lower KV. By the sounds of your knowledge, it seems you understand, but if not, Ill mention it quickly. lets just say a base of 30k rpm. Higher KV, lower voltage to spin 30K produces a lot more heat, amperage etc than a lower KV higher voltage to spin the same 30K rpm. And the ability to spin different larger props. As you stated before, those FSDs you recieved with it could be damaged on 4S. Thats why I asked if it was running 4S. at 3S, the potential just isnt there in my opinion.. smaller props etc. I think the align 1650s could be nasty cool. Outrunners have amazing torgue. I just havent played w/ them enough to give a lot of advice on them. I am however building a twin BJ26 that will have Castle outrunners in it. I believe they are 1800KV and about the same size as your Aligns. I would guess that on 4S with the 1650KV outrunners, you could knock on 50 w/ out much of a problem. Basing off of I can get a Proboat 1500KV to push a 29" hull at 43mph on 4S2P. Then if you threw 5S at it it would be really nice.

Set it up w/ the Aligns. You can tune it to run the speed you want, from nice steady cuising to head turning "wow" passes.

[crrcboatz]

Scott, I cannot thank you enough. Iwill do just that, the 600xl aligns and go 4s sport and 5s for top speed.

Now can I use the 120/240 esc? Those motors are 70amp/80 amp rated.

Also what props? I have a pair of s/b x 447s right and left?

[JackBlack26]

Since Steve carries them now, I would go with 2 36x74 2200kv Leopard motors.

[6sHyper]

[QUOTE=tiqueman;315984]Yes, they were seeing 6S each. BUT, 6S on twins and 6S on a single is two different things. I ran modded 442s, cupped, detongued, slightly thinned and pulled about 90A peak during my runs. A single set up would of pulled a lot more and stresses the components well more than I would have wanted to. You can get by with a little more forgiveness w/ twins. Thats why people gave you crap about it.



Yeah i ran an x442 detoungued s/b. pulled peak amps of 140and ran cool, surprising i guess.

[crrcboatz]

[QUOTE=6sHyper;316140]

Yes, they were seeing 6S each. BUT, 6S on twins and 6S on a single is two different things. I ran modded 442s, cupped, detongued, slightly thinned and pulled about 90A peak during my runs. A single set up would of pulled a lot more and stresses the components well more than I would have wanted to. You can get by with a little more forgiveness w/ twins. Thats why people gave you crap about it.



Yeah i ran an x442 detoungued s/b. pulled peak amps of 140and ran cool, surprising i guess.

I am totally confused with this post??????????????? Can you help me understand what you r trying to say that I can get info from?????