Bill Atwood Rotary Drum .15 Question?

ZACATTACK Thu Jan 31, 2013 8:32 pm

There seems to be 2 different types of this rare motor, Rotary Drum .15 Olympic....Type A..Type B.....Which one is worth more? How many Type A were made as too Type B? I have read 50 were made in total....Which is more rare Type A....Type B? Thanks Guys!

**RknRusty** Thu Jan 31, 2013 8:44 pm

The Atwood Olympic with a rotary valve never made it to production. The Dale Kirn Olympic rear reed was Cox's production machine.
http://www.mh-aerotools.de/airfoils/cox_frameset.htm

EDIT: That outdated frames website never goes to the page I try to link to. Click on "Early Engines."

ZACATTACK Thu Jan 31, 2013 8:49 pm

I realize the engine was never in production but that still has nothing to do with the question asked Rusty? Which is the rarest of the two engines....Type A or Type B? Another question is what kind of packaging did these engines come with?! Shocked

**RknRusty** Thu Jan 31, 2013 9:01 pm

ZACATTACK wrote: I realize the engine was never in production but that still has nothing to do with the question asked Rusty? Which is the rarest of the two engines....Type A or Type B? Another question is what kind of packaging did these engines come with?!

According to Martin Hepperle, the production reed valve Olympic came in a bubble pack.The Atwood Olympic didn't ever come in a package, since it was never sold. That would be the rare one, but I don't see either the reedy or the rotary labeled with an A or B, and they only show one Atwood design on that site. That's my only go-to site for Cox history. If that's not the whole answer, maybe someone else can expand on it.

ZACATTACK Thu Jan 31, 2013 9:47 pm

http://www.mh-aerotools.de/airfoils/cox_olympic_15_rotary.htm

A little more info Rusty! There are two types...Which is more rare is what I'd like to know!! Huh...

**RknRusty** Thu Jan 31, 2013 9:55 pm

ZACATTACK wrote:http://www.mh-aerotools.de/airfoils/cox_olympic_15_rotary.htm

A little more info Rusty! There are two types...Which is more rare is what I'd like to know!!

Well damned if there aren't two. I missed that page. We'll have to wait for the collector guys, somebody here must know.

If you want any links to dead eBay ads for bargain engines, let me know. lol!

warrenlead Thu Jan 31, 2013 10:02 pm

According to Dan Sitter, (published Cox Collector and guru) there were only 2 that were made in the Type B. (with ears) The rest were all Type A (without ears). Perhaps Mudhen can add to this... is he still around?

Cheers

**RknRusty** Thu Jan 31, 2013 10:08 pm

Yeah, Mud's still here. He doesn't post a lot, but he'll reply if you PM him. And he'll probably look at a thread like this one. Good idea.

Jason_WI Thu Jan 31, 2013 10:10 pm

In Dan's book those numbers are not confirmed for the type B version. If you find one for sale buy it because you will probably never fine another one in your lifetime.

ZACATTACK Thu Jan 31, 2013 10:19 pm

Jason_WI wrote:In Dan's book those numbers are not confirmed for the type B version. If you find one for sale buy it because you will probably never fine another one in your lifetime.

Buying something is one thing ....getting your bank account raped for one of these is another!! One just sold on E-Bay for $356.00 I think??

warrenlead Thu Jan 31, 2013 10:29 pm

I would have paid that! The only two original Cox engines I dont have in my collection are the Olympic Drum Valve and the Strato Bug. Despite trying very hard and being outbid many times I am yet to get my hands on these two.

Jason_WI Thu Jan 31, 2013 10:54 pm

warrenlead wrote:I would have paid that! The only two original Cox engines I dont have in my collection are the Olympic Drum Valve and the Strato Bug. Despite trying very hard and being outbid many times I am yet to get my hands on these two.

You mean these.

Bill Atwood Rotary Drum .15 Question? E4a75ebe1aa689d155807ce9589c17c2_zps989fb5b7

warrenlead Thu Jan 31, 2013 11:44 pm

Yep. like those, only not as expensive. lol

I am always weary when bidding for a Strato Bug on ebay as there are a few fakes out there. Dana Sitter has one up for sale at the moment but it looks pretty junky and made from spare parts.

My time will come.

Cheers

Jason_WI Sat Feb 02, 2013 4:02 pm

warrenlead wrote:Yep. like those, only not as expensive. lol

I am always weary when bidding for a Strato Bug on ebay as there are a few fakes out there. Dana Sitter has one up for sale at the moment but it looks pretty junky and made from spare parts.

My time will come.

Cheers

I conntacted Dan on the Strato he is selling. He assured me its all correct just missing the correct length screws to put the back on. 200 is a bargain.

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