Cox Engines Forum
You are not logged in! Please login or register! Guests are limited to posting in the "General Questions (Guest Posting Allowed)" section only. Becoming a member is fast, easy and FREE!


Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» Recent engine acquisitions
by Levent Suberk Today at 4:42 am

» Throttle question
by Levent Suberk Today at 4:35 am

» Happy birthday Oldenginerod
by balogh Today at 4:02 am

» Admitting stupidity in a public place
by Oldenginerod Yesterday at 8:46 pm

» Fleet Trainer plan
by Dave P. Yesterday at 8:18 pm

» babee bee parts
by Cox International Yesterday at 4:29 pm

» The good news, the bad news, and the Oysters
by getback Yesterday at 8:30 am

» Weights............
by rsv1cox Yesterday at 7:23 am

» Fall SMALL -- Oct. 11-14, 2018 (Thr-Sun)--Mayflower, Arkansas
by rsv1cox Yesterday at 7:18 am

» Leroy Cox in RCM magazine
by balogh Yesterday at 3:32 am

Cox Engine of The Month
October-2018
Mudhen's

"Prototype T.D. .010 c.1960"



PAST WINNERS
Speed Contest 2018
CEF Traveling Engine

Win This Engine!
The Traveling Prop
Gallery


World of Aviation

Backplate question for ya.

Go down

Thinking Backplate question for ya.

Post  oldguy on Sun Jun 10, 2018 7:21 pm

Is there a difference between the black widow backplate and the golden bee? Huh...
Thanks
avatar
oldguy
Gold Member
Gold Member

Posts : 225
Join date : 2015-12-10
Age : 64
Location : arizona

View user profile

Back to top Go down

Thinking Re: Backplate question for ya.

Post  Ken Cook on Sun Jun 10, 2018 8:17 pm

The Golden Bee had a venturi intake of .062" and the Black Widow can vary but typically is around .082". I have had Black Widow backplates that measured slightly larger than that. If the Black Widow is opened up, it can extract a few more rpm's, but the run can be inconsistent not to mention the duration in shortened. I have successfully used .093" without fuel draw issues on the Black Widow.
avatar
Ken Cook
Top Poster
Top Poster

Posts : 3216
Join date : 2012-03-27
Location : pennsylvania

View user profile

Back to top Go down

Thinking Re: Backplate question for ya.

Post  oldguy on Sun Jun 10, 2018 10:59 pm

Ken Cook wrote:           The Golden Bee had a venturi intake of .062" and the Black Widow can vary but typically is around .082". I have had Black Widow backplates that measured slightly larger than that. If the Black Widow is opened up, it can extract a few more rpm's, but the run can be inconsistent not to mention the duration in shortened. I have successfully used .093" without fuel draw issues on the Black Widow.


Would you recommend opening up the venturi on the golden bee to .070
avatar
oldguy
Gold Member
Gold Member

Posts : 225
Join date : 2015-12-10
Age : 64
Location : arizona

View user profile

Back to top Go down

Thinking Re: Backplate question for ya.

Post  balogh on Sun Jun 10, 2018 11:45 pm

I would experiment wih a plastic backplate thst is still sold on the market, before modifying a rarity metal backplate unless you have spare ones.
avatar
balogh
Diamond Member
Diamond Member

Posts : 1955
Join date : 2011-11-06
Age : 59
Location : Budapest

View user profile

Back to top Go down

Thinking Re: Backplate question for ya.

Post  Ken Cook on Mon Jun 11, 2018 4:25 am

I would verify if you have a single bypass cylinder. If your in need of more power, the more effective way of getting more rpm's is to replace it with a dual bypass. There's a considerable difference between the two.
avatar
Ken Cook
Top Poster
Top Poster

Posts : 3216
Join date : 2012-03-27
Location : pennsylvania

View user profile

Back to top Go down

Thinking Re: Backplate question for ya.

Post  oldguy on Mon Jun 11, 2018 1:45 pm

Ken Cook wrote:        I would verify if you have a single bypass cylinder. If your in need of more power, the more effective way of getting more rpm's is to replace it with a dual bypass. There's a considerable difference between the two.

Thanks guy's, understand. No need to open venturi if the cylinder can't accommodate. And yes it has the stock #2 cylinder.
avatar
oldguy
Gold Member
Gold Member

Posts : 225
Join date : 2015-12-10
Age : 64
Location : arizona

View user profile

Back to top Go down

Thinking Re: Backplate question for ya.

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