Cox Engines Forum
You are not logged in! Please login or register.

Logged in members see NO ADVERTISEMENTS!


Olympic 15 or Rear venturi motors Cox_ba12




Olympic 15 or Rear venturi motors Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» "Crashed model airplanes"
by rsv1cox Today at 6:08 pm

» Unusual Wen Mac model - "Rare" yada yada
by stuntflyr Today at 3:49 pm

» Diesel conversion
by balogh Today at 12:34 pm

» ebay Beechcraft Staggerwing project arrives today
by rsv1cox Today at 12:23 pm

» Testers Sprite engine swap
by GallopingGhostler Today at 9:22 am

» Cox planes CG
by Kim Today at 8:30 am

» À cool mini v twin Harley-Davidson Knucklehead
by getback Today at 5:59 am

» So, slightly bent, broken and abused French Spad is coming home
by rsv1cox Yesterday at 6:07 pm

» [solved]What is this thing?
by Boats13 Yesterday at 9:01 am

» a cheap sport muffler
by robot797 Yesterday at 12:41 am

» Good friend lost everything in his shop ----Fire
by Admin Tue Feb 20, 2024 10:39 pm

» Another evilBay Enya .06II Throttle Valve
by Boats13 Tue Feb 20, 2024 7:41 pm

Cox Engine of The Month
February-2024
1/2A Nut's

"RC Speed Boat Power Drive TD .020"

More info on this engine!




PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


Olympic 15 or Rear venturi motors Empty
Live on Patrol


Olympic 15 or Rear venturi motors

Go down

Olympic 15 or Rear venturi motors Empty Olympic 15 or Rear venturi motors

Post  Iceberg Thu Oct 08, 2020 8:11 am

I have never had a rear draft rotary motor like the Olympic 15 or other. I am curious what the crank shaft looks like to achieve its operation. I can't seem to find a schematic or picture of the crankshaft. Does anyone have a disassembled one or picture of the crank?

Thanks
Ice
Iceberg
Iceberg
Gold Member
Gold Member

Posts : 381
Join date : 2018-11-03
Location : Suva Fiji Islands

Back to top Go down

Olympic 15 or Rear venturi motors Empty Re: Olympic 15 or Rear venturi motors

Post  Jason_WI Thu Oct 08, 2020 9:13 am

Just like a RR-1 it has an extension on the crank pin to drive the drum valve.

Olympic 15 or Rear venturi motors 5144e310
Olympic 15 or Rear venturi motors 802bca10
Olympic 15 or Rear venturi motors E4774210
Jason_WI
Jason_WI
Top Poster
Top Poster

2022 Supporter

Posts : 3123
Join date : 2011-10-09
Age : 48
Location : Neenah, WI

Back to top Go down

Olympic 15 or Rear venturi motors Empty Re: Olympic 15 or Rear venturi motors

Post  davidll1984 Thu Oct 08, 2020 9:48 am

Nice part Thumbs Up
davidll1984
davidll1984
Diamond Member
Diamond Member

Posts : 2122
Join date : 2020-02-12
Age : 39
Location : shawinigan

Back to top Go down

Olympic 15 or Rear venturi motors Empty Re: Olympic 15 or Rear venturi motors

Post  Iceberg Thu Oct 08, 2020 10:09 am

Thanks for the pictures! The four different holes in the drum. If different holes are used does differnt timing and or performance result?
Thanks
Ice
Iceberg
Iceberg
Gold Member
Gold Member

Posts : 381
Join date : 2018-11-03
Location : Suva Fiji Islands

Back to top Go down

Olympic 15 or Rear venturi motors Empty Re: Olympic 15 or Rear venturi motors

Post  ffkiwi Sat Oct 10, 2020 4:11 pm

Just for the record=the Olympic (and Sportsman) 15s were normally REED valve-the ones shown above by Jason were special development models done by Bill Atwood -there were IIRC about 50 produced...and farmed out to various top fliers for assessment...I think a couple were even used by US team members at the FF WCs in 1959 or 60. The knowledge gained on intake porting helped develop the Tee Dee range. The earlier standard reed valve Olympic was quite an outstanding performer in its day (1959-60) but suffers from a lack of suction-which makes tank positioning quite critical...the less powerful Sportsman is much better in this respect-having both a smaller venturi and a different reed geometry....and consequently stuck around a bit longer-Martin Hepperle's site lists it as being around from 1958-1966: http://www.mh-aerotools.de/airfoils/cox_frameset.htm

ChrisM
'ffkiwi'
ffkiwi
ffkiwi
Gold Member
Gold Member

Posts : 344
Join date : 2018-07-10
Location : Wellington, NZ

Back to top Go down

Olympic 15 or Rear venturi motors Empty Re: Olympic 15 or Rear venturi motors

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum