rotary in a boat

[ridenred27]

http://media.boatmad.com/gallery/d/685-3/wankelturbo.wmv

 

i hope this isnt a repost. impressive. i wonder how fast they were going?

[ChevyMan1972]

HOLY FUCK!!!! That is truly badass!!!

 

 

Dan

[Total Sign]

I would be shocked if that was 70.

 

They dont have the torque to spin a decent sized prop. Drove a rotary jet boat once, accelerated like hell to 60.

 

Wait until a day when there is any chop, turbo replacement gets expensive.

[Tinman]

Should have gone SBC like all of the fast RX7s

[coty061885]

Fucking awesome. At first I was like, "that doesn't seem too fast." Then he got on it and the turbo was screaming, damn that was cool.

[El Karacho1647545492]

when wake just turns into a white blur, you're going fast

 

 

 

i'd still rather have the RX-7 though

[Science Abuse]

There is a company commercialy offering rotary marine engines....and they're Deisel!

[Science Abuse]

I would be shocked if that was 70.

 

They dont have the torque to spin a decent sized prop.

Incorrect. That was not a 5 screw destroyer, it was a lil jetboat. Youre trying to spin the props fast, and for that you need hp. You need torque to accelerate all the drivetrain (if its a twin screw), but you're top end will be the same as any other 600hp boat that size.

[copperhead]

WOW, that looks like way too much motor for a boat that small.

 

I remember a few years ago asking on here how a rotary boat would do, and everyone jumped my shit about it failing due to lack of TORQUE....I now see that's not a problem.

[morabu]

DAYUUM!!

that little as boat was movin!

[Lustalbert]

Still just not as satisfying as the sound of a blown v-8 cracking open the throttle plates.

[wnaplay1647545503]

Still just not as satisfying as the sound of a blown v-8 cracking open the throttle plates.

 

I have the 454 with captains call exhaust. I bring it topside when I want the added attention. Sounds sweet.

[Guest powers]

just what I want to be surround by water with an unreliable power plant.

[Guest GMoney]

I can say that boat is way fast. At first when he pulled out of the no wake, I thought gay but when the boat is going like 50 and he hits and it twists the boat sideways. Crazy just Crazy. The HP to weight on that boat has to be great. Any chop in that boat good night. I have been in pro sponsored bass boats with 300+ hp at 80+ mph, race boats with triple 600+hp supercharged V8's, and some fast turboed jetski's. Anything nearing 100 or over on the water is way fast.

[Science Abuse]

just what I want to be surround by water with an unreliable power plant.

worked fine for about ten thousand years.

http://www.downtheroad.org/southamerica/images/New_Folder8/DSC00150.JPG

[Lustalbert]

The wind will come back eventually. Once a dorito loses its powdered coating, it is gone for good.

[ChevyMan1972]

Here go and look at the website. If you click on the "Boat project" at the top it will tell you all about it.

 

http://www.xtremerotaries.com/

 

They claim it makes 800hp at 9500 RPM and goes 120 mph max speed. Wich tells the story.

 

Here is another vid of it next to a bigger boat with a v8.

 

http://www.xtremerotaries.com/main2/Quicksilver/60-102mph.wmv

Dan

[Total Sign]

Incorrect. That was not a 5 screw destroyer, it was a lil jetboat. Youre trying to spin the props fast, and for that you need hp. You need torque to accelerate all the drivetrain (if its a twin screw), but you're top end will be the same as any other 600hp boat that size.

 

You know more than I do.

 

How many 100mph boats have you built?

 

150 mph?

 

When the camera goes down to the speedo, pause the video.

[Lustalbert]

so that is a roll race on water. Interesting.

[Science Abuse]

You know more than I do.

 

How many 100mph boats have you built?

 

150 mph?

 

When the camera goes down to the speedo, pause the video.

I dont hear you proving me wrong. I see a tach, but none of the smaller gauges are remotely readable. One might be the speedo, and it might be at about 70, but fuck, it could be a temp gauge in C.

Hp moves boats, torque moves generaters, which move electic motors, which move big boats.

 

How many 100mph boats have you built with 600lb ft cummings diesels sporting only 300hp? Zee-Roe.

Physics applies everwhere, you want to accelerate fast, you need HP and torque. If you just want to go fast, all you need is HP and patience. It's a big single rotary, it could be anywhere between 300 and 700 hp. I'll take 300hp and 60 mph without complaint.

[Guest GMoney]

completly stocks Boats larger and heaver than that with little 4 banger at 150hp will run 50mph

[copperhead]

completly stocks Boats larger and heaver than that with little 4 banger at 150hp will run 50mph

 

But they won't get there very fast.

[Total Sign]

Eric, a boat is always "accelerating." Always has a load on it. Never coasts. I dont touch diesels, but there are a few out there running 120.

 

I have yet to see any 4 banger boat run an honest 50 on GPS.

[Nitrousbird]

Boats in general are unreliable/maintance intensive as hell WITHOUT adding a rotary into the mix.

 

I will say that in a boating application, a turbo rotary doesn't have to deal with the cooling issues that a automotive application has to deal with. The lake is the radiator, and can keep the intercooler nice and cool too.

 

The boat is fast as fuck, no doubt about it. It also didn't look overly stable, was pretty small, and 1/2 the boat was the motor!

 

Eric: there are some performance diesel applications. I have an article from a couple years ago in a boating mag (in my work truck, so I can't quote it right now), where I believe it was Baja was offering one of their bigger boats w/ twin diesels and a surface drive setup. It was faster than the exact same boat with a more conventional stern drive setup w/ BBC's making significantly more HP.

[Maro]

WOW!