Dual/Twin Drive Delta Force 33 (2x540L)

[vvviivvv]

http://translate.google.co.uk/transl...en-US:official

annother view of the back of the kiton

[obrien008]

Thanks for all the feed back guys.

Brushless55: Ive decided to just use two 540 12Ls on 4s2p, ill be running 40mm carbon props to begin with and will hopefully get some 42mm brass eventually depending on how hot its running

tiqueman: I actually made some of the side plates out of the cf plate but they didnt come out as nice as I wanted them to. I preped the existing ones and spray painted them and they look real nice, probably better then the cf ones would have looked surpisingly

Thanks Scott and vvvvvv.... : Hearing that other people had success with a dual mono gives me some more confidence, I found some pics and video of the MHZ Kiton and looks pretty close in setup to this, maybe the props are a little higher though. I just hope mine runs as nice... These are a few of the videos I found of it running

http://www.rcvideoshare.com/rc-boat-videos/rc-boat-mhz-kiton-mono-von-hans-106-kmh-66-mph/

http://www.rcvideoshare.com/rc-boat-videos/rc-boat-mhz-kiton-v-hans-offshore-racing-ebensee-09/

And heres some pics that kind of compare my setup to the Kitons setup and the motor mount

[vvviivvv]

Mhz Kiton is a twin mono...

so is the skater

[Scott T]

This build is cool. I wanted to comment last night, but had to find something first - an issue of RCBM from Fall 1988 that has a twin 80 Twin Craft mono (46"). John Finch did an article of this build for SAW running.

From the looks of it, he also used flex shafts out of the bottom of the hull, but the prop height looked similar to that of a single surface drive mono. His spacing was a little wider than yours, but his mono had a shallower vee angle.

You build looks great, love the carbon work. I would flip the strut brackets though, to get them a bit higher. I'd be concerned that they'll be getting hit with water off the transom when running if they're too low.

[tiqueman]

Going up a few post and a page back, I use a general cutting blade on a bandsaw at a med low speed and it cuts beautifully.

Obrien, how about making the motor mount side plates from carbon rather than painting them? That would look very nice in that hull.

[Brushless55]

Well the reason I am looking into the really low KV is that I could use a single 6s1p only drawing about 65-70 total max amps with 2 540 17Ls. Is that too high of a voltage for those motors? or would that setup be able to run on 6s1p???????

It's possible that twins would pull more than 70 max amps!
that's alot of rpms and if the props are to much that will add more draw

[obrien008]

Well the reason I am looking into the really low KV is that I could use a single 6s1p only drawing about 65-70 total max amps with 2 540 17Ls. Is that too high of a voltage for those motors? or would that setup be able to run on 6s1p???????

[Jesse J]

The trade off is weight. I don't see the need to go to super low KV motors. Personally I would go 14L on 5S - yes twins should draw significantly fewer amps

[obrien008]

I second that , Easier on everything + probably the bonus of longer run time

Ya thats exactly what I am looking for, the thing is the 540Ls are listed as upto 4s.

Am I safe on 5s as long as the KV is around 35k?

Since were already going in this direction,how about about a 540 17L or 18L on 6s?
They have a max Amps of 38 and at 22.2V gets about 32-33k RPM

With 80 max amps between two motors, probably less as a dual setup I could possibly just use one 6s 5000maH (Two 3s in Series) pack?

What would you all personally choose/recommend?

[ray schrauwen]

just make sure you can fit 5S packs in this cat. I have some Turnigy 20C 5S 5000's that just barely slip into the sponsons. Too big to lay on the tunnel.

[Punisher 67]

Does anyone think this is a good idea to go with higher voltage and a lower current draw?

I second that , Easier on everything + probably the bonus of longer run time

[Jesse J]

Don't use a bandsaw unless you use a carbide blade with no teeth. A tothed blade will tear it up.

Jon

Mine has a fine blade and I no tear CF; it actually gives a pretty nice edge. But, yes, carbide would be nicer and fine is key.

[Jesse J]

Anyways I was thinking about maybe running 540 14L's on 5s which should give about 32500 RPM only drawing max of 44 Amps @ 18.5V.

How many cells can the 540L take?

If you don't go over the mid 30k rpm range, you will be fine. I like the sound of your 14Ls on 5S.

Does anyone think this is a good idea to go with higher voltage and a lower current draw?

That is my other motto! it is way easier on all your electronics,

[j.m.]

Don't use a bandsaw unless you use a carbide blade with no teeth. A tothed blade will tear it up.

Jon

[obrien008]

Suggestions Please

Thanks for the tips guys, sanding it down is working nice, now I just gotta get a band saw and some of those scisors, but im pretty much done with most of the carbon fiber on this boat atleast.

Anyways I was thinking about maybe running 540 14L's on 5s which should give about 32500 RPM only drawing max of 44 Amps @ 18.5V.

How many cells can the 540L take?

Does anyone think this is a good idea to go with higher voltage and a lower current draw?

Im looking to go with a more reliable set up rather than a strictly speed set up.

My original plan was 540 12Ls on 4s which should give about 31000 RPM drawing 55 Amps @ 15 Volts

Another reason I want to do this is that I already have 3s packs and would just need two 2s Packs rather then 2 4s Packs.