Custom/Hybrid Wasserjet, Rotary Engine teaser video

[shmity1]

The Torque curve is impressively flat. Almost a straight line from 3500-11,000RPM. Peak power starts to come on just over 7,500rpm and holds up to 9,000-9,500RPM.

There isn't an oil sump like a Mazda. In order to align the PTO of the engine with the drive shaft there just isn't enough room. Sure we could change the design, spend thousands of dollars and make an oil sump, raise the engine and add a gear drive. But then it gets heavy and expensive, who wants that?

This engine can either be premix or oil-injected. Premix will be the first version. I know what your thinking, "Premix! How can it be a 4-stroke? How can it be Clean". It isn't as clean as a piston type 4-stroke but since all the oil is captured and burnt in the combustion chamber the hydrocarbons are much lower than a 2-stroke, even a direct injected 2-stroke.

We have been in contact with the EPA and CARB and are working to meet their requirements. These first engines will not be certified, but are 4-strokes.

More to come later...

 

[Scraggly]

The Torque curve is impressively flat. Almost a straight line from 3500-11,000RPM. Peak power starts to come on just over 7,500rpm and holds up to 9,000-9,500RPM.

There isn't an oil sump like a Mazda. In order to align the PTO of the engine with the drive shaft there just isn't enough room. Sure we could change the design, spend thousands of dollars and make an oil sump, raise the engine and add a gear drive. But then it gets heavy and expensive, who wants that?

This engine can either be premix or oil-injected. Premix will be the first version. I know what your thinking, "Premix! How can it be a 4-stroke? How can it be Clean". It isn't as clean as a piston type 4-stroke but since all the oil is captured and burnt in the combustion chamber the hydrocarbons are much lower than a 2-stroke, even a direct injected 2-stroke.

We have been in contact with the EPA and CARB and are working to meet their requirements. These first engines will not be certified, but are 4-strokes.

More to come later...

I'm out of thanks, but thanks for the info.
Back to my original concern aren't most pumps on the Market today based around a 8000 rpm peak range if efficiently? 11-12000 would be awesome but won't the pumps efficiently fall off after 8-9000 rpm ?

 

[h2odesperado]

Very exciting! Cool to see new engine tech actually hitting the water.

Its charge cooled, meaning there is no need for a supply of water from the pump? That would be quite a departure from the norm.

 

[BrightE's]

Hey Shmity, this develompent is beyond awesome. Quick question from the snap-shot up on your facebook page.

Your wankel engine looks almost modular in design. Does that mean that additional rotors could be bolted on, hull space permitting?

 

[Yami-Rider]

I dont under stand how the 2-stoke gas will lube the crank and rotor internal gears? That normally a separate area for engine oil.

 

[shmity1]

The motor is modular but would require a new crank. Theoretically we can make a 3 or 4 rotary but at some point the PTO will break.

"Charge Air Cooled" meaning the air coming into the outer two intake tubes pass through the crank bearing, then through the inside of the rotor, and then into the combustion area. When the "Premix" and air pass through these areas the bearings get cooled and lubricated.

The engine is still liquid cooled.

If you notice there are two rotors but 4 intake tubes. The two on the outside, as mentioned above, direct air through the crank bearings and the rotor. The two inside intake tubes direct air directly at the rotor. There are a set of butterfly's that control this "direct injection". When the butterfly's are open this is when you get the highest HP. If the butterfly's are open all the time, then there will be no "Charge air cooling" that can take place. So this will limit the amount of HP attained or limit the amount of HP for a given amount of time.

 

[motobehrens]

How well does the rotary motor handle minor water ingestion compared to a two stroke?

 

[kraqus]

Very Promising!




Benny

 

[Krazysxirider]

Excuse my ignorance here. I've always been interested in rotary engines. Lately there have been more popping up. Is this design similar to the rotary uav engines?

http://www.rotronuav.com

I know this is different but a testament to the big power rotary engines can produce in a small package. 200hp 100 ft lbs.
http://thekneeslider.com/cr700p-700cc-rotary-racer-from-crighton-racing/


Sent from my XT1058 using Tapatalk

 

[CRJ]

you have my attention...

 

[shmity1]

Rotron 300cc castings come from the same foundry we get our castings. Rotron advertises their 600cc engine having 66hp. This is rated for continuous HP in an aerospace application. There are design differences between their engine and ours but the castings for the rotor are the same.

The crighton engine uses different castings than ours. The casting in the 350cc size is larger and heavier than the 300cc casting. The 350cc casting would not work well in our hulls because of the distance between the crank and the outside diameter is too large for a direct drive. This 700cc engine can produce more HP, but the price per HP is substantially higher as these castings are only used for aerospace applications (an this special motorcycle project).

The guy that owns Rotron, Giles Cardozo, is friends "Bear" Grylls. These two used a rotron engine to fly over Mt. Everest. Our initial discussions were with Giles but the cost to develop a 2 rotor at that time far exceeded our budget. We went down a diffeent path with Woellfle and as you see by the video on the first page, we have a couple of prototypes and one of them is in a Rickter hull running on the water.

Other people have talked about it, other people have dreamed about it, but (as far as I know) we are the first to have a stand up PWC powered by a rotary engine.

 

[CRJ]

so whats an estimated cost?

 

[shmity1]

Pricing...we are not ready to announce pricing. We have a target and the target is to compete with other manufacturers of engines. Dasa for example produces engines starting at $6,000 all the way up to $8,500. Keep in mind that there engines do not include couplers, ignition system, fuel delivery system (Carb and Intake), Exhaust header, Starter, or flywheel. Our engines will be offered as a complete package.

Keep in mind our engines are 4-stroke engines and this means that unlike a competitive 2-stroke you will be able to run this in your ski on lakes or waterways that have banned 2-strokes.

 

[CD155MX]

Keep in mind our engines are 4-stroke engines and this means that unlike a competitive 2-stroke you will be able to run this in your ski on lakes or waterways that have banned 2-strokes.

Once you get them to be CARB complaint. The motor would need an executive order sticker before we could legally ride on those banned waterways.

 

[shmity1]

Once you get them to be CARB complaint. The motor would need an executive order sticker before we could legally ride on those banned waterways.

Yes, you are correct. As mentioned earlier we have already been in contact with both CARB and EPA about this process.

 

[CD155MX]

Yes, you are correct. As mentioned earlier we have already been in contact with both CARB and EPA about this process.

I wish you guys all the luck in the world. This is encouraging to watch.

 

[bird]

Pricing...we are not ready to announce pricing. We have a target and the target is to compete with other manufacturers of engines. Dasa for example produces engines starting at $6,000 all the way up to $8,500. Keep in mind that there engines do not include couplers, ignition system, fuel delivery system (Carb and Intake), Exhaust header, Starter, or flywheel. Our engines will be offered as a complete package.

Keep in mind our engines are 4-stroke engines and this means that unlike a competitive 2-stroke you will be able to run this in your ski on lakes or waterways that have banned 2-strokes.

Rotary Engines complete the Otto Cycle in ONE revolution of the crankshaft. The way you're wording it makes me want to call a 2-cycle a 4-stroke because it uses the backside of the piston.

Please tell/show me proof rotary engines have less emissions than a direct injected two stroke. DI Two strokes have less emissions than a comparable 4 stroke (check out eTecs in Ski-Doos).

As with all Wankel engines, how long do the seals last on the lobes? These are comparable to compression and oil rings as one unit.

 

[shmity1]

A rotary is not a true 4-stroke with a piston and intake valves, but one difference between a rotary and a 2-stroke is that with a 2-stroke there are unburnt hydrocarbons passing from the intake port through the exhaust port and out the pipe. Unburnt oil and gas out the exhaust (Except in the direct inject models were you just have unburnt oil).

The 800cc E-tecs produce about 55PPM of Hydrocarbons. The 4-tec Aces produce 8-10PPM of Hydrocarbons. Not sure what you (bird) are saying "DI Two strokes have less emissions than a comparable 4 stroke". Now I will say that DI/ETEC or evinrude motor that produces 115hp only produces around 15ppm or less hydrocarbons. But this 115hp motor is a V4 with 1726cc of displacement. I don't think anyone wants this 350lb beast in their stand up?

We currently do not have test data for emissions but are confident with proper tuning, and other means we can get to CARB/EPA emission standards for marine vehicles.

The goal is not to get into a discussion about rotary Vs. other forms of internal combustion engines and their functionality but supply you with information about our company and this project.

Please give us a chance to prove the merits of our engine.

 

[CD155MX]

 

[waxhead]

Looks very interesting. Can't wait to see its development