Custom/Hybrid Melmack's very unique 300sx build

Melmack

Melmack

(Timothy)
Location
New Braunfels, TX
It went OK. The problem seems to be tat the UAV market is driving the price of these motors through the roof. I'm working on getting a motor but it's expensive. For now, I'm moving forward and building another 2 stroke to simulate the power to weight of the rotary. At least then I will have prop pitch and handling ready for when I can afford the Rotary. I plan to have the 50hp engine in the 300 by Fall LSFR. It should run much better than the 300. Hopefully well get a few backies on video while there. If anyone comes across a used Parajet rotary or an Axiro go cart motor, please let me know. Right now the Parajet is in the $7k range new and the Axiro is $5500. That's more than double what I can pay right now. Once we prove this thing works and meets EPA demands, I will move forward with licensing to produce our own rotary at a much lower price.
 
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Melmack

Melmack

(Timothy)
Location
New Braunfels, TX
Oh, sorry, been busy with the holidays.

Basically the military use of the rotary has driven the price through the roof. A working engine would costs well over $10k. That's not even on my radar. So until the feds stop buying these or the Chinese start making them, it's on hold. I will be working on a 550 engine to double the power and only add a few lbs but that wont be working until summer. I have a new job and will eventually have the money to put into the rotary but for now, it's on the back burner. Sorry guys. Thanks for all the support and interest. I'll post up when I have more.
 
naticen

naticen

Site Supporter
Location
wilmington, nc
subscribed,

but why could I not get to the last page until I posted and now, mine is the only post on the last page.
It says "Results 161 to 165", but I just see this one.
 
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Mobile Chernobyl

Mobile Chernobyl

Location
1 Mile High in Colorado
Jetpilot106 said:
How can it cost 10 gs to build a 300cc 4 stroke motor.You would think since 4 strokes have been around someone could build you a epa safe motor for a price way under that..
Click to expand...

Do you think the Wankel costed only $10K to build a working prototype?

It's also a 4 stroke engine, and the first prototype was most likely low in the cc's count!

Although he hasn't said much about it (and probably can't due to contractual obligations perhaps?) , I think this prototype is part of something much bigger!
 
Brian_216

Brian_216

Location
Harveys Lake PA
I'd rather see them deleted than this thread get locked over something the OP had no part in.

Now to get back on topic. When we bought the molds from Thailand, I found that Melmac was also trying to get them for this project. We have talked and there is a possibility of using our hull with his project. I just have to get around to my end of the deal and provide him with a crude representation of the hull.
 
McDog

McDog

Other Administrator
Staff member
Location
South Florida
If money is a problem for the engine prototype I say call that super rich russian guy who is friends with Rick Roy. You know. The one who does flips off his monster yacht's wake. I think he helped get rrp going, right? Anyway, just an idea to throw out there.
 
Melmack

Melmack

(Timothy)
Location
New Braunfels, TX
Geez! Ive been away too long. Not even sure what the heck i missed. So, just a quick update. No motor yet. I have been looking for a prototype but my Railroad Job has sucked the life out of my endevours here. I haven't given up on it just have to put it on the back burner a bit. I will tell you that the 300sx prototype is still alive and well. So I'm just waiting for the motor to pop up. I am packing up a 550sx to have built to my specks. Once that is installed, I will prove the light weight low power engine can compete with the bigger more powerful skis. Then it is just a matter of getting hold of a parajet or axiro engine for use as a prototype. I will be making better money soon so I will be saving up for a rotary. Please contact me if you find a parajet or axiro single rotor used in your area. They are impossible to find. Thanks!

PS: Brian, I would still love to take you up on that offer. Lets talk.
 
Melmack

Melmack

(Timothy)
Location
New Braunfels, TX
kraqus said:
What are the Feds using them for? Is there only ONE manufacturer?
With such a demand I would hope someone jump to the ocassion.



Benny
Click to expand...

They are used in UAVs. Here's a link to the company I was working with. They lost interest in sending the prototype when they heard we where not interested in paying 15k per engine. The motor is basically the same as a Parajet motor designed by Wolf in Germany. Its a single rotor, 300cc that produces arround 55hp but weighs much less than a similar hp 550 motor and runs cleaner. Imagine a dual rotor version! Read for yourself...

http://www.nwuav.com/uav-products/uav-rotary-engines.html
 
d_moss

d_moss

Location
Rexburg, ID
idk about that motor in a ski.

Ever driven an rx8? gutless wonders. no torque. slow. Until 7000 rpms then they start to move... a little. Thats why the ls1 swap is so popular.

I just think you need torque and to get that you need displacement for it to be instant. a super charger works good but there is a slight hesitation.

If i wanted to keep weight down and still have decent power. Try something like a cr500 piston and re sleeve that cylinder. They are made for the yamaha. I dont know how well the ports lineup and what not. 89mm bore with 68mm stroke? just guessing on the stroke... Thats 423cc with off the shelf parts kinda. A blank sleeve and then cut out the ports yourself would be ideal.

Idk. seems easier to buy a bob with a big motor.
 
Melmack

Melmack

(Timothy)
Location
New Braunfels, TX
Right. Thanks for the imput. But the purpose of this is to build a ski that is epa legal. The gutless part can be fixed with the corect pitching. And my experience with mr first rx7(b12) and the others I have driven are just the oposite. The rx8 is hampered by epa and weight. Not a true sports car by any means. That is a terrible example of what a rotary can do.
 
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