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ok guys so i have a 41" catamaran hull that i want to setup strictly on 6S for top speed only, no racing or anything like that. i want to put a leopard 4082 2200kv motor in it with a seaking or turnigy 180a esc. is this a good setup for what im looking for? and any prop sugestions if it is a good setup? thanks. also i have a 41" V-Hull that im throwing a leopard 4074 2200kv motor in with a seaking 180a esc. is this a good setup for top speed runs on 6S only and if so what are some prop sugestions. and if none of these setups are correct then please advise me.
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Probably wouldnt wanna go over a 45mm prop to be honest.Comment
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41" would need a pair the setups you detail to accomplish anything interesting.
That single power more suited a 32" cat
regs
W
.Wayne Schutte PhdCSE BaSE BaEE. Australian, & damn proud of it
YOUTUBE
@ 36" H&M Maritmo twin1512/1800 6S1P 88mph @ 40" drag hydro#1 twin 5692 12S1P .....always for fun @
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I have a Graupner PX-1 , which is a 41" cat intended for twin power. The kit plan shows a pair of expensive graupner brushed motors and 12v Nimh cells.
My intention is to fit 2x HK Turnigy T600 1400KV outrunners for 6S using twin T180 ESC's probably running 445's.Problem is that the back of the hull is designed to use straight solid drive shafts and does not have a lot of space to fit suitable stingers. I have found a company in Germany that produces one specifically for this kit, but costs megabucks since presumably they don't sell too many as it is a discontinued and quite scarce kit. Unless I can source something else that is suitable, will have to raid the piggy bank and order a pair of these.
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My cat is a genesis hull that's already setup for single motor use. I've seen one on YouTube running similar single motor setup hitting 84MPH and that's what I'm looking for. The v-hull I have is the 41" vanquish again already setup for single motor use.Comment
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gb tiggycat
That Graupner PX-1 is the same hull as the MHZ Isiklar http://www.mhz-powerboats.com/Hulls/...---42-71-.html
You can use their drives and might not cost as much as the ones you speak of. You want the drives for their 44" Mystic. Which are in this link http://www.mhz-powerboats.com/catego...m---44-8-.html I am building a 41" myself and if I do single a TP 4092 1450kv on 6S with a ABC 3 blade prop 1.6P 45.72mm will get you low 60s but on 8S should put you at 80.I only need one!!!Comment
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You said you were powering a 41" cat...the Genesis is a 37" cat, and a small one at that (very narrow and small splash).
DrWayne was correct in what he said as he was just going by the information that you provided. (Boats are not measured from the trailing edge of the rudder but from the transom forward.)
The question would be: How many times do you want to do it? Is this just an attempt to get a fast speed and be done, or is this a boat that you want to run often and rely upon?Comment
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Hi. Share the youtube link here, Always good to see someone's goal
Ive also seen one those little hulls clip 101mph.. but it wasnt to factory spec.
Speed Vs budget.
What coin is required to reach that 84mph ?
Not hard to make a small toy go fast .. considerably more difficult to make that a repeatable event.
The 37" Genesis is a narrow boat, not so good for fast corners.. but they're good otherwise
we're always trying to be helpful here, so ask away !
WWayne Schutte PhdCSE BaSE BaEE. Australian, & damn proud of it YOUTUBE
@ 36" H&M Maritmo twin1512/1800 6S1P 88mph @ 40" drag hydro#1 twin 5692 12S1P .....always for fun @Comment
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Here is the link Doc..
I have just put together a genesis with a Leopard 4082 2200kv, T180, x642 and m445 props to choose from at this stage, done a lot of reinforcing in the tunnel and properly aligned and re-glued the stuffing tube in with good epoxy. Now I'm waiting on a side mount rudder bracket cause I'm too lazy to make my own and in no hurry (its been raining a bit up here in north Queensland lately, got over 120mm yesterday in my gauge). Also I need to upgrade the drive shaft to .150 & 3/16. As I believe its much stronger (though I have no idea why, if anyone could explain Id be grateful).
I too am hoping to crack 100kmh mark with mine, even if only a couple of times, just to say Ive done it, I will be happy to run the boat on 4s once achieved for reliability and more stability.
I have no plans to run as fast as the one in the link, just want to crack the 100kmh mark as I said. I have tested with a turnigy aquastar 3974 motor on 4 and 5s with the x642, its got HEAPS of power but with the water pickups I have fitted and the inline rudder I'm having issues getting it to run straight so haven't bothered to radar the boat.
According to the speed calcs on this site I have a 100kmh+ boat now, fingers crossed its true.
Do you think I'm dreaming??Comment
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Hi.
I know you're not a child, but lots who read these forums are, so I write to cater all minds
chuckle.
I have a Toyota Landcruiser.
I removed the stock TD engine, and fitted a Honda racing motorcycle 2cyclinder 250cc that redlines at 11500 rpm
All the 4WD calcs say it will now do 250mph.
how do you think I'll go.
Dreaming ?
Alright, back to reality ( or a bit closer to it at least )
The stock flex shaft is 4mm?
All the energy from your whizzbang power system is translated through this to the load (prop)
As the shaft turns to spin the prop, that prop will cause a rotational loading (twist) in the flex.
Your bigger/better motor/esc/battery setup will cause a high load/twist that will exceed the sheer/tear strength of that 4mm flex .
Stoic little blighters.. it may hang on for weeks, but it will eventually snap, or twist up into hull destroying coils, maybe snap off prop stub shaft losing prop to the deep, and/or tear your whizzbang motor from the now broken hull.......... eek !!
Ditto 3/16 or 1/4 flexes if their power system is more than expected !.. so this is not a 4mm only thing... power Vs equipment
If you have upgraded from the stock system, Id certainly have a shaft size upgrade.. or wait for the tearful evening after the stock system went snap/crackle/pop... and the overloaded flex is no more than a residual stench inside your now scarred mind/hull ..... B)
The youtube link shows "4082 leopard 1500kv on 9s with a swordfish 240hv"
After the brand name Leopard, the similarities kinda end.
6S Vs 9S.
More voltage means more torque.. that's the ability of the system to turn a prop consistently
battery voltage x capcaity ( amps) x discharge rate is available power ( so labelled)
so a 6S 40C 5000mAh offers 25x40x5 = 5000W ... 6S 2200Kv = 55000rpm
9S 40C 5000mAh offers 37x40x5 = 7500W ... 9S 1500Kv = 56250rpm
They LOOK the same.... but clearly there is a large power and torque difference.
Yes, the setup you detailed above may reach 100kmh... but it will not hit 84mph... it has less than 2/3 the youtube clip's setup.
( and I wager the clip's flex wasnt stock !! )
regardss and cheers !!
Wayne
ps. send a pic of the rain, down here in SA it's a forgotten phenomena
Last edited by drwayne; 01-24-2013, 07:53 AM.Wayne Schutte PhdCSE BaSE BaEE. Australian, & damn proud of it YOUTUBE
@ 36" H&M Maritmo twin1512/1800 6S1P 88mph @ 40" drag hydro#1 twin 5692 12S1P .....always for fun @Comment
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Cheers.
100kmh is the goal as I said, I'm well aware it wont go 84mph.
My question about the flex drive should have been much more clear, .150 is a smaller than 4mmis it not, cant see how its stronger, I do not understand, however I read thats whats required to handle it so thats what I be getting.
This here FB page contains images of rain... by the looks of it NSW is in for an average month of weather this month overall, from being on fire to being underwater. Hopefully not.
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rhengst22.
Sorry to hi-jack your thread man! But it would seem we have similar goals.Comment
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Wayne Schutte PhdCSE BaSE BaEE. Australian, & damn proud of it YOUTUBE
@ 36" H&M Maritmo twin1512/1800 6S1P 88mph @ 40" drag hydro#1 twin 5692 12S1P .....always for fun @Comment
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