What would it take to build a 100MPH Cat

[dasboata]

I have a class 1 drag cat. I am thinking to do a electric build it is a very strong boat what, motors, batterys, and speed control would it take to build a 100MPH boat, I am not new to model boats or going FAST ! I have held 9 NAMBA SAW records in Nitro ,, I know how this question sounds,, But I really would like to consider this build thanks chris

[Chilli]

How big is the boat Chris?

[britscoot]

heres a build i will be trying to copy.
I have the full CF version of the hull.

http://www.youtube.com/watch?v=2btz85GIah4&feature=mfu_in_order&list=UL

I have a class 1 drag cat. I am thinking to do a electric build it is a very strong boat what, motors, batterys, and speed control would it take to build a 100MPH boat, I am not new to model boats or going FAST ! I have held 9 NAMBA SAW records in Nitro ,, I know how this question sounds,, But I really would like to consider this build thanks chris

[dasboata]

Small 35" but the boat is a 80MPH gas boat set up correctly !!!

[Alexgar]

single or dual drive?

[Alexgar]

i think blackjack 26 had some 75-80 mph cats get with him

[dasboata]

single or dual drive?

Single would be easier and cheaper to build,, but can you get, that speed with a single ??

[Chilli]

Currently the only IMBPA SAW records over 100 are riggers (for now).

Jay Turner "Fluid" has done over 80 in a Sprint Cat (34.5") on a single 6S powered and a 1527/1D. Current IMPBA Record for Q-Tunnel (not outboard tunnel) is 73+. Keep in mind, SAWS motors run very hot and are only capible of very short run times. Even then, equipment doesnt last that long due to the stress that it's put under. I recently had a converted nitro driver ask for a motor recommendation that could smash a FE SAW record and be used for heat racing. I told him such a motor doesnt exist.

I'm sure the experts will chime in. I'm not one of them. LOL

[Make-a-Wake]

Currently the only IMBPA SAW records over 100 are riggers (for now).

Jay Turner "Fluid" has done over 80 in a Sprint Cat (34.5") on a single 6S powered and a 1527/1D. Current IMPBA Record for Q-Tunnel (not outboard tunnel) is 73+. Keep in mind, SAWS motors run very hot and are only capible of very short run times. Even then, equipment doesnt last that long due to the stress that it's put under. I recently had a converted nitro driver ask for a motor recommendation that could smash a SAW record and be used for heat racing. I told him such a motor doesnt exist.

I'm sure the experts will chime in. I'm not one of them. LOL

Neither am I, but I'll throw out a Neu 2220 1Y on 8s...............bet it would get way up there.............not sure about 100 though

http://www.cermark.com/products/NEU-2220-series%3A1190kv-or-1Y-winding.html

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[tiqueman]

Ive got a twin Castle 1520 1600KV on 6S pushing a 45" cat at 80 and the equipment isnt even trying. All I wanted it to do was 60, so it really took me by suprise. I dont want to push it more as I cant afford to replace any of it. But I think your dream is do-able. Get w/ mudl on here, although he mainly does twin, he does some amazingly fast and etrememly low budget builds. Hes done high 80s w/ both a BJ26 and a Genesis. A few of his fellow local boaters have HPRs (twins) doing over 100mph. Gerwin would be a good one to talk to as well. I know single drives take a lot more and use a lot more power, but well planned out and as much research as you can will certainly help you get there.

Best of luck w/ your build. Ill be watching and waiting.

[ScarabChris]

I think the real problem wouldn't be getting the speed but rather keeping the boat in the water and stable at that speed.

You need size and weight to keep the boat in the water but weight will slow it down.

In my gas boating days the outriggers were always the fastest boats. One of my club buddies back in the day had a rigger with a super worked Quickdraw engine and it had to be well over 80 MPH. It was so fast you could barely see the boat. Just a blur and water spray.

[Fluid]

Chris, are you GPS racing or going for a record? The problem isn't power, we have plenty of power to push a cat to well over 100 mph - the Germans do it all the time. The problem is boat design. Virtually all North American cats are designed for oval racing and handle great - but they have way too much lift and will not stay on the water at 100 mph for 330 feet. I've tried air dams and tunnel tabs which can help, but the solution is not band-aids but better design.

The German cats are modeled after full scale racing catamarans and their tunnel design creates far less lift. Too, their sponson design helps to keep them stable at high speed. Most of them handle terribly.

I designed a little lightweight 12-cell NiMH wood-on-foam cat in 2004 and set the NAMBA P and Q SAW records for offshore - those records stood for years after we went to LiPos. That boat was fast because of its design, at the time it was the fastest non-rigger FE boat period. The power was anemic compared to what we have today, but the Q Offshore record was finally broken only last year.

Your Drag Cat may reach 100, but you will blow off and damage it before you get two consecutive passes. A crash at 100 is far more brutal than one at 80. If you are serious about a 100 mph cat, get one with a narrow tunnel having a gradual entry angle. Run 10S2P with a Neu 2215/1.5Y or 2220/1Y, you will have plenty of power.

Twin motors have the advantage of no prop walk - assuming you can find matching left and right handed props. Otherwise a single is just as good with the motors we have today, IMO anyway.



.

[dasboata]

[QUOTE=Fluid;277751]Chris, are you GPS racing or going for a record? The problem isn't power, we have plenty of power to push a cat to well over 100 mph - the Germans do it all the time. The problem is boat design. Virtually all North American cats are designed for oval racing and handle great - but they have way too much lift and will not stay on the water at 100 mph for 330 feet. I've tried air dams and tunnel tabs which can help, but the solution is not band-aids but better design.

The German cats are modeled after full scale racing catamarans and their tunnel design creates far less lift. Too, their sponson design helps to keep them stable at high speed. Most of them handle terribly.

I designed a little lightweight 12-cell NiMH wood-on-foam cat in 2004 and set the NAMBA P and Q SAW records for offshore - those records stood for years after we went to LiPos. That boat was fast because of its design, at the time it was the fastest non-rigger FE boat period. The power was anemic compared to what we have today, but the Q Offshore record was finally broken only last year.
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !1
Your Drag Cat may reach 100, but you will blow off and damage it before you get two consecutive passes. A crash at 100 is far more brutal than one at 80. If you are serious about a 100 mph cat, get one with a narrow tunnel having a gradual entry angle. Run 10S2P with a Neu 2215/1.5Y or 2220/1Y, you will have plenty of power.

Twin motors have the advantage of no prop walk - assuming you can find matching left and right handed props. Otherwise a single is just as good with the motors we have today, IMO anyway.
hey Jay if I can get record speed I sure will take it tp a Event !!! This is a boat taken fron europen molds with permision from PPB I think Paul Swalen (spelling ) For the most part this is a proven 80MPH hull it it built very well also !!! What do I need a single or a twin Props are no problem they are my bussiness I have to go thanks chris

This is a boat taken fron europen molds with permision from PPB I think Paul Swalen (spelling ) For the most part this is a proven 80MPH hull it it built very well also !!! What do I need a single or a twin Props are no problem they are my bussiness I have to go thanks chris

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[ScarabChris]

Props aren't a problem for him, he is a master RC prop maker.

[Brushless55]