Igotntc3andrevo

Ok guys i need to no what brushless motor what hull and what esc i need to go 100 mph baisically i need all the right stuff in the right boat. and a charger that can charge any amount of cell say like 30 or a unlimited amount of lipo cells thanks guys this is for a customer at my job.

crazyotto

My Feedback: (2)

so you know your customer will be spending 3k just so you know ....try finedesignrc.com they hold water speed records

LtDoc

100 mph...? Good luck! Don't hold your breath.
- 'Doc

CadillacDTS2001

didto
wel;l if ou want say 70mph or so go to rum runners racing the best guys there

Ron Olson

My Feedback: (1)

I hate to hear that someone with cubic dollars wants a boat that will go that fast as it takes a lot more than that when you are talking about running anywhere near that speed. The setup is very critcal on a boat running at high speeds, you can't just slap one together and expect it to go that fast as changes as little as 1/2 degree will make a huge difference in its handling.
I'd say that 3 Grand would be a conservative estimate to go that fast.
Sorry, I've already seen people with more money than experience or brains and what they can do in R/C boating.

crazyotto

My Feedback: (2)

true on that ...but it will be easy to make it 100mph scale speed

properchopper

That raises an interesting question; just how does one calculate " scale speed" ? Anyone know ?

Tony [8D]

CadillacDTS2001

well
take the budwesier select cat boat , it set the world speed record for 202 mph for its class of boat
so then if you have a 1/10th scale version of it then the respectable speed for it is 20.2mph
and if you havea 1/8th scle its 25mph and so on just devide the top speed of the real boat buy the scle of your boat

properchopper

OK, but here's the prob. I've got a Drifter S [ @ 26 " ] same as the Scat Cat 26 that you have . What's the scale ? If you've calculated the scale speed formula for your SC 26 I can use the same. Help !

Tony [8D]

CadillacDTS2001

well the boats are the same length yes
but the scat cat is modeled after the 44(foot ) mti cat ,
and the drifter is modeled after a 60 foot aussie cat
so there is a diffrence in scale !
so your drifter is proble about 1/10th scle , and my CS26 is more like 1/18th
see what im saying ?
so your drifter in real life usaly make about 170-180mph runs consistantly
that means 18mph is scale speed
hmmm that seems a little slow , but it is scale and most boats never run scale

properchopper

Here's what I'm trying to figure out : If a two foot 1/8 scale boat does 37 mph and a 60 foot it's scaled after does 180 mph, what is the extrapolated speed of the two foot boat. Maybe I should stop trying to figure this out, my head hurts !

Tony [sm=confused.gif]

properchopper

BTW, here's a pic.

CadillacDTS2001

yep , i know what the drifter s looks like , i was going to buy one , but i decided ont eh SC26
And any way , you have it rite , most boats dont run scale ,any way , no reason to worrie , just rember if the boat is dialed in rite , there should be very little rostertail at full speed

lol

crazyotto

My Feedback: (2)

there goes the neighborhood i just make a joke about scale speed and now i find out i cause people to have headaches over this lol . i think if a guy whm contracted this job out gets a fast 50 mph rc boat it will look like 100mph to him and he should be happy with , end of story right ??

CadillacDTS2001

lol just make it have a lot of stripes down the hull to make it look fast just sitting there !

churchrvb

My Feedback: (9)

if its ur job wouldnt u kno what to get?

Igotntc3andrevo

Hey guys i agree i dont think that a person should have a set speed to go and that they should just get all the right stuff and be happy with the turn out as that is what i do, And im into the nitro cars.

churchrvb

My Feedback: (9)

oh ok, not really any boats guy at work?

Igotntc3andrevo

Noop we really arent that big of a hobby shop so we don't carry all the stuff i would like but eh its fun any way so if some one has a ? i cant answer i ask you guys

JunkieFX

Here, take him sky diving an have him jump out of the plane with the boat. It should hit 140.... In all honesty...100 is very scary for any RC "minus planes"... maybe suggest a 7-14 cell rigger to him to see if he even wants to go that fast? That should be good for what guys.... 30-45mph?I know people in LCMBC that have spent atleast 3000 on thier b-riggers "7.5cc 60%nitro 20+yrs exp" and they ony got close to 75-80 and even then on a 1/6mile course thats too fast "it more or less ran a 1/4 course because of the speed" Just my .000002cents

Igotntc3andrevo

yeah i gave him the link earlier in the post and i sent him on his own so hopefully he finds what he wants

Andrewg

As a fast electrics vendor - dont try and give your customer a 100 mph boat
He can have a 70 mph boat easy - 1/8 scale hydro
But as others here note the very high speeds are about setup. Also a lot of the fastest electric boats are actually relatively small - one guys sets his 24 cell speeds using a 6 cell rigger
Your customer seems to need more commitment too.

Calculating scale speed -

The way to do this is to multiply the oringal boats speed by the square root of the scale factor.

For example if you have a boat which is a 1/4 the length of the original then the square root of the scale factor is 1/2 ie 1/2*1/2 = 1/4

Using a real example the 203 mph Callan Marine cat and the 34" Toysport model of that boat http://www.fastelectrics.com/hulls.asp#Tunnels

The 34" Toysport model is approximately a 1/14 scale model of the Callan Marine Cat

The square root of 1/14 is 92/355.

Multiply 203 x 92/355 = 52.5 mph is the scale speed of the cat

crazyotto

My Feedback: (2)

dude you just fried my brain like chicken with all of that you just said >>>[&:]

CadillacDTS2001

makes sence, but my way is eazyer

churchrvb

My Feedback: (9)

yo i aint kicking it with you no more, im going to mommy house