OS/Graupner Wankel - It had to happen

rdw777 wrote:Way to go Bob!…. Yes, Under the present journey was bound to happen…. Totally get it…. Let us know what you find out about that rotary wonder

I just found and ordered my first ever .010…. Hope she’s a good’un!!

Robert

Your going to love running that .010 Robert. I had one years ago while living in Florida. New, it was an easy starter and loved to wind up. Wonderful sound from that little thing. Build another Silver Lining for it. Post, post, post. I still love the little things.

Didn't know that you had a childhood Stingray. Schwinn? Gray Ghost? Bought one for Mark.

Hopefully a good one. Should be "as new" according to seller. Reminds me of a Star War probe.



But just in case, I bought another one more to my liking. Beat-up, phillips screws hogged out and who knows what else. Gives me something to play with. ebay just listed BIN. Made an offer and the seller took it. A fraction of what they are going for.




I have wanted one of these ever since they first came out. Put it off, put it off. But, hey.........I'm 85 with one foot on a banana peel. Times running out for getting the good stuff....

Glad you found another one Bob to rehab… Your specialty is free stuck components!!!! I remember when they were advertised and yes, expensive….. I remember when the .010’s were advertised too and relatively not that expensive but at least for RC, Cox had outpaced the electronics manufacturers in miniaturization by a number of years except for simple single channel…. Nowadays more functions for lighter and cheaper…. Opens the door for some neat possibilities….

You bet will keep posting….. Pageboy is due for updates soon….Just slowing down and enjoying the tinker part of it….

I can’t remember for sure if the bike had the Schwinn tag on front or not…. Definitely had Stingray on the chain guard in white…Bike was gold with chrome fenders… Single speed coaster brake…. I “hopped it up” by putting a slick on the back!….Lots of jumps with a 2 x propped on a stack of blocks …Mom won it at an auction they had geared towards kids that was sponsored by Gandy’s milk…. The “money “ to bid with was milk carton tops…

Keep playing with these, Keeps you young!!!

Bob, I'm happy to see how much energy you have!!, I'm glad you're doing this and sharing it with all of us, I'll be watching your progress!
Robert, congratulations on Cox's .010, I hope you have it with you soon and we'll see if you share with us here with that little gem.
Hug for you friends!

Bob I have always wondered how the fuel economy of a Wankel - having those apex seals less perfectly retaining compression than a well fit ringless piston in a common IC engine- compare to that of a normal reciprocating model engine ? I assume the Wankel rpm-s are higher by default than reciprocating engines so with that said, even if probably more blow-by but shorter compression-expansion cycles Wankels are fuel efficient engines? Sorry for theorizing, but we seldom discuss Wankels here and I would appreciate.others' opinion.

Dave McIntire does a good job in his videos of taking one apart and then reassembly, then run it when he rebuilt it.

OS Wankel A Look Inside Part 1:
https://www.youtube.com/watch?v=pftLfBjN6kQ


OS Wankel A Look Inside Part 2:
https://www.youtube.com/watch?v=GWdEWcAOttY



OS Wankel The First Run After Rebuild:
https://www.youtube.com/watch?v=OvkfZ45NAwg&t=3s


Here is the full list of different OS/Graupner Wankel engines he has run:
https://www.youtube.com/playlist?list=PLsvn3JGZAOMuIp_nXQsLMUrIqzhUFCdUQ

balogh wrote:Bob I have always wondered how the fuel economy of a Wankel - having those apex seals less perfectly retaining compression than a well fit ringless piston in a common IC engine- compare to that of a normal reciprocating model engine ? I assume the Wankel rpm-s are higher by default than reciprocating engines so with that said, even if probably more blow-by but shorter compression-expansion cycles Wankels are fuel efficient engines?  Sorry for theorizing, but we seldom discuss Wankels here and I would appreciate.others' opinion.

This is a pretty good run-down of the various 1984's.  I never did check the mileage on my '85 but they are not known for their fuel economy.  

https://fueleconomy.gov/feg/bymodel/1984_mazda_rx-7.shtml

The Wankels use a little injected spitz of oil to lubricate the seals, but I don't recall excessive consumption on mine.  The fun part of a Wankel are their willingness to rev up.  

And yes, videos.  There are so many that I have to cut my time short watching them or I would never get any work done.

sosam117 wrote:Dave McIntire does a good job in his videos of taking one apart and then reassembly, then run it when he rebuilt it.

OS Wankel A Look Inside Part 1:
https://www.youtube.com/watch?v=pftLfBjN6kQ


OS Wankel A Look Inside Part 2:
https://www.youtube.com/watch?v=GWdEWcAOttY



OS Wankel The First Run After Rebuild:
https://www.youtube.com/watch?v=OvkfZ45NAwg&t=3s


Here is the full list of different OS/Graupner Wankel engines he has run:
https://www.youtube.com/playlist?list=PLsvn3JGZAOMuIp_nXQsLMUrIqzhUFCdUQ

Thanks for posting those three videos, they helped a lot in disassembly.  Most of the machine screws were hogged out but I only had to drill one head.  Never underestimate the power of heat, or the pain of burned fingers.  JIS screwdriver and vice grips helped on two. I can't pull the drive washer, gear puller way too big.  Got to figure that one out.










Some PO not sure of what he was doing had been in there before.  

How about this for an application.

rsv1cox wrote:

Some PO not sure of what he was doing had been in there before.

I'm not sure what you mean by "PO", Bob, (or, another terminology that has meaning?)

Also not sure what I should be seeing that is wrong, somewhat unfamiliar with the rotary technology. Clue?

rsv1cox wrote:How about this for an application.

Fokker had an earlier single engine version. Also, perhaps a pre-WW2 Junkers W-34?



I have in the past thought about the OS Wankel, but the latest version until discontinued at $450.00 a pop was a bit more engine than I wanted to spend money on. It is fantastic technology, Nick Ziroli used one on his Grumman F4F Wildcat, which gave it zippy performance.

Since, I have watched the auction prices, and seemed more a pipe dream, beyond my "fun" budget, (why I don't have a larger Tee Dee yet.)

But, congrats on your purchases. Would like to see a run-up report video of those.

"PO" = Previous Owner George.

Your first picture, notice the distressed Phillips holding the counter-weight on. That and missing screws, hogged out threads replaced by a nut, etc. etc.. No need for that. Correct screwdriver, penetrating oil, heat. If a heat gun doesn't work, get out the butane torch.

Yes, I think old Henry copied the Fokker.

And yes, expensive for what they are. Main reason I held off buying one for so long. Took the RX-7 and 85 years to move me. When I get around to it, I want to weigh one and compare with a standard .30 engine.

Mikes Wankel video guy was right on. Somebody loves them.

They work great for converting glow fuel back into castor oil.

Thanks, Bob for clarifying. For me, sports cars are out of the question. My 2001 Kawasaki XII Voyager tourer is sufficiently sporty for me, so I guess in a way we all have similar interests for speed and acceleration. (I roll the throttle and with the 4 carbs opening up, watch the cars behind me disappear, 96 HP upsized, detuned 4 cylinder 1200 Ninja engine.)





I'm getting there in age, but not ready yet for a trike.

But, could not leave enough alone, just won this, a K&B .09 Torpedo C/L engine.

Ken Cook wrote:          They work great for converting glow fuel back into castor oil.

I think that's a negative on the Wankels Ken.  

Beautiful bike George.  My ex son-inlaw and my two grandsons would would applaud.  I never got by my Honda S-90.  I'm just not of a size to haul around a big bike, not that I wouldn't love to.

Edit. Just saw your K&B. Super interesting and something that I would jump on too.

That sure is a neat little engine there. Never seen, nor heard one run in person. Very interesting!

NEW222 wrote:That sure is a neat little engine there. Never seen, nor heard one run in person. Very interesting!

Are you referring to Bob's OS .30 Wankel or my post just now of my K&B .09 Torpedo?    

The K&B Torpedo .09 probably doesn't sound much different than my OS Pet .099-III CL, Enya .09-III's, OS Max .10R/C, Fuji .099 S-II R/C, and etc. All those are fenced (baffled) piston and cross scavenged. Fact it's exhaust port is on the left side rather than the right means it will be mounted on the left side of a profile fuselage, so exhaust is down (away from hands and face.)  

When it gets here and I get a chance to clean it up, will post more on it.

Wankels = potato chips. You can't stop at just one.

ebay last night about 2am. I was sound asleep. Under my ebay tree this morning.

The Torp .09 is a neat engine and it does pretty well for a older engine. They're a bit loud but they sound great. It has a slightly different note over the OS. One of my club members built a Netzeband Scared Kitten around the .09 and it works terrific.

Ken Cook wrote:                The Torp .09 is a neat engine and it does pretty well for a older engine. They're a bit loud but they sound great. It has a slightly different note over the OS. One of my club members built a Netzeband Scared Kitten around the .09 and it works terrific.

I have several hum drum larger displacement K&B's but nothing special like George's .09. Serial number (one of one ) and spark plug makes it unique.  It is a great find.  Something that you were looking for George, or it just popped up?

The "Good" Wankel arrived today also.  Shipped from California, priority mail, signature required.  Over packed and over shipped.  The shipping contailer was made especially to house the engine and with a "Happy Holidays" greetings from Patricia.  Left them super positive feedback.







That makes three.  Considering this:

Outerzone 59" span




I said:

That and missing screws, hogged out threads replaced by a nut, etc. etc.

My mistake.  All three have that nut on one case screw.  No hogged out threads.

Hi All,

Those Wankels are cool !

When they were newly out, a club member had one on an UglyStick type plane.
Flew great all summer.
Smooth running, sounded great, revved more than similar sized engines.
Over the winter he built a scale lightplane with an aluminum cowl for it. Forget the type, but it was really nice.
Test flight, it took off and flew really nice.
After five minutes or so he landed. Engine not right.
Adjusted the needle valve, everything seemed good so tried again.
Same thing, five minutes and he had to land.
Then someone noticed blistering paint on the cowl.
Off it came and the once shiny engine was brown, and cooked.
Tried it without the cowl, but it never ran as good again.
Turned out Wankels run hot and do not like to be cowled.
Last time I saw a Wankel around here.

Really expensive then. Could get 2 or 3 nice .60s for the same price...

I am enjoying this post, curious what the inside looks like...
Thanks,
Dave

rsv1cox wrote:

Ken Cook wrote:The Torp .09 is a neat engine and it does pretty well for a older engine. They're a bit loud but they sound great. It has a slightly different note over the OS. One of my club members built a Netzeband Scared Kitten around the .09 and it works terrific.

I have several hum drum larger displacement K&B's but nothing special like George's .09. Serial number (one of one ) and spark plug makes it unique.  It is a great find.  Something that you were looking for George, or it just popped up?

Bob, yes, was browsing a few E-Bay engines, it popped up. I looked at the price, fairly high volume seller with 100% feedback, no negative comments on any engines he sold, looked at the photos with less 2 hours on the clock. Photos looked clean, made a bid, only one other bidding, got it for under $32 shipping and tax included.

Should ship early next week, have by Friday. Will know more when it arrives. Good to hear that Ken gives a full thumbs up on it, as I intend to put it on one of my CL's.

HalfaDave wrote:Those Wankels are cool ! When they were newly out, a club member had one on an UglyStick type plane. Flew great all summer. Smooth running, sounded great, revved more than similar sized engines.

Over the winter he built a scale lightplane with an aluminum cowl for it. Forget the type, but it was really nice. Test flight, it took off and flew really nice. After five minutes or so he landed. Engine not  right. Adjusted the needle valve, everything seemed good so tried again. Same thing, five minutes and he had to land. Then someone noticed blistering  paint on the cowl. Off it came and the once shiny engine was brown, and cooked. Tried it without the cowl, but it never ran as good again.

Turned out Wankels run hot and do not like to be cowled. Last time I saw a Wankel around here. Really expensive then. Could get 2 or 3 nice .60s for the same price...

Can even cook a Schneurle or legacy cross scavenge with poor cowling techniques. Nick Ziroli on his F4F Wildcat had it exposed open in the breeze with his radial cowl and cooling exit holes toward the back I believe. I always like to have my engine's head and cylinder exposed, hanging upright or sidewinder sticking out of a cowl.

You are right, for the price I could buy a half dozen .40-.45's for the price of the Wankel .30, and have the same amount of fun (without the prestige of course, but fun exceeds pride factor!

Yup, he made an expensive boo boo. Think positive, he could have been flying a scale turbine powered jet with $35,000 US invested and Figure-9 it with a flaming inferno loss like this person did.

Popular Mechanics: This $35,000 RC Plane Crashed Right Into the Ground and Exploded

Yes, I've seen the cheapest Jet Cat turbine engines go for over $10,000 each.
So if that plane had two of them, at the cheap end , that would be $20,000 for a start.

"Then someone noticed blistering paint on the cowl.
Off it came and the once shiny engine was brown, and cooked."

Good reason to leave them out hanging in the breeze.



Blast off...........Sorry, some things i just can't resist.

Pa-ta-to,  Pa-tah-toe, You rolling in CHIPS!! That's
definateley
a packing box suitable for display. Just curious what's the little square whitebox shown?  GPS tracker for confirmed delivery??