twin 90 rigger

[urbs00007]

I'm running a wood outrigger with a neu 2230 725 kv on 12-s 5,000 ma rtr weight 19 lbs. the neu 1527 seems pretty potent on 6 cells. would running twin 1527 on 6-s be a good move?

[kendt]

Im no expert but 19lbs seems very heavy. Especially for a rigger. I would look at the weights of all the components you would be using to run twins and see how the numbers add up. If theweight is going to go up it may not work. I dont get crazy concerned about weight normally but sometimes there must be a point where the weight exceeds that which the boats design can lift.

[urbs00007]

rigger

Im no expert but 19lbs seems very heavy. Especially for a rigger. I would look at the weights of all the components you would be using to run twins and see how the numbers add up. If theweight is going to go up it may not work. I dont get crazy concerned about weight normally but sometimes there must be a point where the weight exceeds that which the boats design can lift.

weight is fine boat designed to run light on water. would twins be a step up ?

[T.S.Davis]

You could in theory put the same number of watts into the water. 175amps on 12s vs 175amps on 6s X 2. Both are 7770 watts ish minus efficiency. Not sure what would be better though. A single huge prop or two smaller props spinning a bunch of rpm.

My thinking is that you will lose efficiency on two props, two speedo, two sets of wiring. Effectively increasing total loss of potential energy over the single drive.

Interesting idea. Love to hear more opinions. Fun brain teaser.

[kendt]

weight is fine boat designed to run light on water. would twins be a step up ?

The weight may be fine now. But at some point it is not going to be. The fact that it is designed to run light on the water is the very reason you can just keep adding more weight.The sponsons provide lift while maintaining minimal contact with he water.And with most riggers its a very delicate balance. If it were me i'd be trying to go the other direction. A single motor with a 6s set up. Go to a higher kv rating for more rpm's and get the weight down. Twins would be very cool if it worked. But it could be a costly disaster if it doesnt.

[urbs00007]

rigger

The weight may be fine now. But at some point it is not going to be. The fact that it is designed to run light on the water is the very reason you can just keep adding more weight.The sponsons provide lift while maintaining minimal contact with he water.And with most riggers its a very delicate balance. If it were me i'd be trying to go the other direction. A single motor with a 6s set up. Go to a higher kv rating for more rpm's and get the weight down. Twins would be very cool if it worked. But it could be a costly disaster if it doesnt.

what single motor with 6-s would put in this to lower weight ?

[RaceMechaniX]

A single 2230 12S rigger is going to be a decent size boat. 19Lbs does sound a little heavy, but I would imagine the boat is robustly built to handle a crash at high speeds. Let's assume the weight is not the issue.

1527 1Y's are excellent 6S motors for sport use and will swing plently of prop in a twin. Weight wise it will probably be a tad heavier with twin 1527's given the second esc, strut, 1/4 cable, etc.

Is a twin cooler than a single ABSOLUTELY! Does it increase the headaches YES. Although counter rotating props would be a big advanatge here finding mid to high lift props in pairs will be a challenge. Nothing wrong with using two left hand props and living with the prop walk.

Pics of your current rigger would help paint the story.

A single 6S motor rigger running a 1P set-up should be 7-10lbs depending on construction and will be equally as fast. For 6S there are a handfull of really good options and kV available from Neu, Castle, Lehner, Leopard, Scorpion. Suggestions would be:

Castle 1717 1Y 1500 or 1600kV
Neu 1527 1Y 1250kv
Lehner 2280/6 1233kv or 2280/5 1480kv
Lehner 2260/8 1233kv or 2260/7 1409kv

Tyler

[kendt]

I am currently working on a .45 size rigger for a 6s. I will be using a castle 1717 1580kv. That motor will be able to swing a huge prop, however I recall reading somewhere that riggers prefer a slightly smaller prop at higher rpm,s over a bigger prop at lower rpms. Is this correct? I honestly have no idea but I ,ll keep it in the back of my mind when testing mine. At some point i may decide to go that route.
Can you tell us more about the boat you are using? Pics?

[Fluid]

...Although counter rotating props would be a big advanatge here finding mid to high lift props in pairs will be a challenge. Nothing wrong with using two left hand props and living with the prop walk...

Actually the propwalk seems to be an advantage. Where I live I get to watch some of the fastest nitro and gas twins around, and every one I've seen used non-CR props. Over the past decade I've asked the drivers (around ten of them) why they prefer both props turning the same way. Every one has said their lap times are lower with non-CR setups - the boats turn a lot better. For SAW then CR would be a big advantage, but for oval probably not so much.

In spite of claims to the contrary, even Ferrette ran non-CR riggers:

[kendt]

Now that is one mean ass rigger. I like. It sounds then that what I read about riggers preferring smaller props would also be untrue. If the prop walk helps it corner better, then better to have a bigger one.

[grsboats]

Personally I don't see a problem to run non CR props as there are many ways to counter balance this effect. ...a 3 degree offset on the strut and a little toe in on the right sponson usually solve the overveer in a rigger.Gill

[kendt]

I'm running a wood outrigger with a neu 2230 725 kv on 12-s 5,000 ma rtr weight 19 lbs. the neu 1527 seems pretty potent on 6 cells. would running twin 1527 on 6-s be a good move?

http://forums.offshoreelectrics.com/...6S-rigger-Done!
Not sure if you have seen this. Notice the weight of this boat rtr. How does this design compare to yours? Similar in size or design ? It is do able but its just a question of weather or not your hull is a good candidate.

[urbs00007]

rigger

best speed to date 96 mph. needs more prop

[kendt]

Well that hull looks pertty solid and you def have room for a twin.96mph is pretty freakin fast.... Do you have any sort of data logging to record the amps you are pulling?

[urbs00007]

rigger

Well that hull looks pertty solid and you def have room for a twin.96mph is pretty freakin fast.... Do you have any sort of data logging to record the amps you are pulling?

as i recall 260 amps at one point