|
|
Post by rotoryguy on Feb 28, 2022 3:45:08 GMT -5
Hello All-
I saw this video by JohnnyQ and really like his stuff so I thought you all might be interested also.
Nice machining skills and equipment.
|
|
|
|
Post by wayne on Feb 28, 2022 16:37:08 GMT -5
Some home workshop!!
Amazing skills.
|
|
|
|
Post by timpa136 on Mar 2, 2022 9:58:35 GMT -5
Thanks for that post. What a craftsman is that person!
A few years back I saw a model rotary plane but didn't get a chance to see it fly at an air show.
|
|
|
|
Post by rotoryguy on Mar 4, 2022 7:00:34 GMT -5
Years ago- like maybe 40, I purchased the OS Wankle and although tempted, I never ran it.
I just kept it oiled and every once in a while I take it out to look at it.
It wasn't a powerhouse as I've read, just a cool idea.
I've seen them on ebay for outrageous prices - I probably paid $100 or less back in the day!
If you look there are some listed from over $500 to over $1000 - wow!
The youtuber JohnnyQ90 must have an amazing shop and he's darn talented!
|
|
|
|
Post by wayne on Mar 5, 2022 4:38:43 GMT -5
I had one of the OS wankels as well. Never ran it in a model but if you bolted it to a block of wood and ran it with a prop, you could hold it in your hand. Very smooth.
I see OS has discontinued them. I guess that explains the crazy asking prices.
|
|
quawk
2nd Gear
Posts: 150
|
Post by quawk on Mar 5, 2022 11:31:11 GMT -5
Rotoryguy and Wayne, What is an OS Wankel?
|
|
|
|
Post by kanonkopdrinker on Mar 5, 2022 17:14:44 GMT -5
Google it!
It is a Wankel engine designed for radio-controlled model aircraft …. if memory serves, built by Graupner?
David
|
|
|
|
Post by wayne on Mar 5, 2022 17:58:52 GMT -5
Graupner may have had one David, I can't recall but the one ROTORYGUY and I am referring to was manufactured by Japanese company OS. QUAWK, OS is the brand name of a Japanese model engine manufacturer. The company has been around for decades but manufactures mainly two and four stroke model aircraft, car and boat engines. From memory they'd made two versions of a model rotary but searching the web for images it seems they made a third. The first version wasn't around for long before they replaced it with the more heavily finned version. The motor has since been discontinued:  |
|
|
|
Post by Framitron on Mar 5, 2022 18:51:22 GMT -5
That is a great video. He does great work and edits the films nicely.
Did anyone else cringe at the fact that he was running that motor with no cooling at all? The solid flywheel will move no air across the fins as a propeller would. Seems like its only a matter of time before it seizes from overheating.
I'm sure he could install a test club to at least get some airflow over the fins. But at least he has the IR camera so he'll know what its exterior temperature is...
|
|
|
|
Post by rotoryguy on Mar 6, 2022 6:05:50 GMT -5
Sorry for my lateness.
Yes,the pics Wayne has posted are what I was referring to.
I've seen these run in real life and they are quite smooth as expected.
I don't intend to sell mine and who knows, maybe I'll find an appropriate airplane worthy of it!
Framitron - yes I was cringing but this fellow certainly knows what he's doing in a machine shop so I figured - eh what the heck!
|
|
|
|
Post by kanonkopdrinker on Mar 7, 2022 4:06:38 GMT -5
Hi Wayne,
I think we’re actually talking about the same thing!! Turns out Graupner / OS are joint producers ….
I have cut (and hopefully pasted) this from the Internet ….
Stay well,
David
In 1969, the Ogawa Seisakucho of Tokyo, Japan began manufacturing the world's first model rotary piston engine, the .30 cid Graupner-O.S. Wankel based on the German NSU/Wankel patents. The fact that two of the world's largest model firms, Johannes Graupner of Germany and Ogawa Model Mfg. Co., of Japan had seen fit to allocate considerable resources to the development of the engine, projected success for the venture. In 1954 Felix Wankel discovered the concept, the rotating of a triangular piston or rotor in an epitrochoidal (e-pit-ro-koy-dull) shaped chamber. After considerable full sized motor car experimentation in Germany and Japan, the Graupner organization worked for over 6 years and then enlisted the help of O.S. who put another two years into the project before bringing it to market in 1970 at $87.50 retail as part of the extensive O. S. model engine line.
|
|
|
|
Post by wayne on Mar 7, 2022 4:40:38 GMT -5
Thanks David. Never knew what OS stood for yet I've owned a dozen of their engines. Makes sense, especially for 1968, for Germany to be involved in any wankel development.
For some time I was quite involved with model aircraft but never saw the Graupner-OS rotary used in Radio Control. I know people spoke of using them, their small size lent themselves to hiding inside cowlings on scale model aircraft. The piston two strokes would be a compromise requiring cut outs or oversized cowls. Obviously there was some other issue with them.
Also didn't know the model wankel was that old. I bought one in the late '80's but sold it around 12 years later.
|
|
]