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

Logged in members see NO ADVERTISEMENTS!


Thermal Hopper - Cylinder Fin Reduction. Cox_ba12




Thermal Hopper - Cylinder Fin Reduction. Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» Introducing the new - "QZ" RR-1
by Boats13 Today at 10:19 am

» STUKA bomb dimentions needed
by latole Today at 9:36 am

» Indexing COX cylinders
by davidll1984 Today at 7:56 am

» Another of C.T. engines cleaned ---- Cox Tee Dee .09 --- Just today (3/26/2024) more Cox parts
by Yabby Today at 7:47 am

» Introducing our Cox .049 TD Engines
by Yabby Today at 6:33 am

» 1/2a Skyray plans?
by 944_Jim Yesterday at 10:14 pm

» Postage stamp backplates
by JPvelo Yesterday at 8:52 pm

» my attempt at making an exhaust throttle for Cox .049
by roddie Yesterday at 8:20 pm

» Cosmic Winds, - Big Guy, Little Guys, Silver Guy and Wounded Guy.
by rsv1cox Yesterday at 5:18 pm

» My friend Ramón, his Cox .09 & Cox .010
by MauricioB Yesterday at 12:31 pm

» Parts Cox TD-4
by rsv1cox Yesterday at 8:40 am

» On ebay a very special Cox engine
by davidll1984 Yesterday at 6:32 am

Cox Engine of The Month
March-2024
balogh's

"COX Budapest" .049 engine



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


Thermal Hopper - Cylinder Fin Reduction. Empty
Live on Patrol


Thermal Hopper - Cylinder Fin Reduction.

Go down

Thermal Hopper - Cylinder Fin Reduction. Empty Thermal Hopper - Cylinder Fin Reduction.

Post  KIRK1950 Sat Feb 21, 2015 7:40 am

I just purchased my first Cox engine since 1963, an early Thermal Hopper 0.049. I build vintage speed planes and the engine will be going into a 1953 Magna Models 1/2A speed ship. As some may know, the Magna's are an all-magnesium fuselage/cowl & stab with aluminum-skin wings. The model will be for display because of the rarity.

I will need to reduce the outside diameter of the cylinder /head in order for it to fit inside the magnesium engine cowl.
Questions:
1) Is there a recommended minimum-diameter dimension for this procedure, in order to eliminate over-heating?
2) Other than gingerly chucking-up the cylinder in the lathe and hoping not to distort it, does someone have an easier, yet accurate method of doing this?

Thanks!
Kirk


Last edited by KIRK1950 on Sat Feb 21, 2015 8:09 am; edited 1 time in total (Reason for editing : photo added)
KIRK1950
KIRK1950
New Member
New Member

Posts : 3
Join date : 2015-02-21

Back to top Go down

Thermal Hopper - Cylinder Fin Reduction. Empty Re: Thermal Hopper - Cylinder Fin Reduction.

Post  getback Sat Feb 21, 2015 7:56 am

WELCOME TO THE FORUM KIRK !! I am not familiar with the plane I am sure others on here are But it looks like over heating is not a problem if your not running it ? and if the head is sticking out of the cowl can you install the cyl. after it is put together ? I have never cut one down myself though , but you will need to refinish it after or will bee steel flavored .
getback
getback
Top Poster
Top Poster

2022 Supporter

2023 Supporter

Posts : 10028
Join date : 2013-01-18
Age : 66
Location : julian , NC

Back to top Go down

Thermal Hopper - Cylinder Fin Reduction. Empty Re: Thermal Hopper - Cylinder Fin Reduction.

Post  KIRK1950 Sat Feb 21, 2015 8:17 am

The display planes I build are flight-ready and built per the period. I had a hip operation 5 years ago, so I can no longer fly C/L.

The engine on the Magna 1/2A is totally enclosed, just like a large speed ship, aside from a tiny hole for battery lead and a 3/16" x 7/8" vent slot in the front and rear of the enclosed cowl.
KIRK1950
KIRK1950
New Member
New Member

Posts : 3
Join date : 2015-02-21

Back to top Go down

Thermal Hopper - Cylinder Fin Reduction. Empty Re: Thermal Hopper - Cylinder Fin Reduction.

Post  JPvelo Sat Feb 21, 2015 3:30 pm

Welcome to the forum Kirk!
Here's something you might be interested in:

https://www.coxengineforum.com/t5898-cef-profile-scale-speed-rules

It's a profile scale speed contest we do on the forum. The last two have been reed valve only but this years contest added a Tee Dee class.
We would love to have your participation as a builder, proxy flying is permitted.

Here are the previous runnings results:

https://www.coxengineforum.com/t7730-reed-speed-2014-results?highlight=Results

https://www.coxengineforum.com/t6798-reed-speed-results?highlight=Results

And a link to the design/discussion page:

https://www.coxengineforum.com/t7115-cef-speed-contest-design-discussions

Hope you join in the fun!
Jim
JPvelo
JPvelo
Diamond Member
Diamond Member

Posts : 1969
Join date : 2011-12-02
Age : 56
Location : Colorado

Back to top Go down

Thermal Hopper - Cylinder Fin Reduction. Empty Re: Thermal Hopper - Cylinder Fin Reduction.

Post  Ken Cook Sat Feb 21, 2015 4:08 pm

Kirk, does the Peanut use the same engine? I believe on the instructions of the Peanut it tells you how to do what your asking. I could be totally incorrect about this but my flying partner does indeed have the Peanut kit. I would ask him but he's at a show currently in another state. Ken
Ken Cook
Ken Cook
Top Poster
Top Poster

Posts : 5414
Join date : 2012-03-27
Location : pennsylvania

Back to top Go down

Thermal Hopper - Cylinder Fin Reduction. Empty Re: Thermal Hopper - Cylinder Fin Reduction.

Post  GWILLIEFOX Sat Feb 21, 2015 4:15 pm

June 1957 Flying Models:
Thermal Hopper - Cylinder Fin Reduction. Fm570610
GWILLIEFOX
GWILLIEFOX
Rest In Peace
Rest In Peace

Posts : 304
Join date : 2014-12-23
Age : 80
Location : Beaver Falls, PA

Back to top Go down

Thermal Hopper - Cylinder Fin Reduction. Empty Re: Thermal Hopper - Cylinder Fin Reduction.

Post  getback Sat Feb 21, 2015 4:22 pm

Man I know the feeling about the hip , I am sorry to hear that I have been needing one for a few years but can still deal with it for now .... the pain can really S.... Back To Topic  yes what Jim said ... I would think NO more than 1/2 on the fins reblue / black ? and come build / prois. s flight with use !! Eric Babe Bee Repost
getback
getback
Top Poster
Top Poster

2022 Supporter

2023 Supporter

Posts : 10028
Join date : 2013-01-18
Age : 66
Location : julian , NC

Back to top Go down

Thermal Hopper - Cylinder Fin Reduction. Empty Re: Thermal Hopper - Cylinder Fin Reduction.

Post  getback Sat Feb 21, 2015 4:26 pm

KIRK1950 wrote:I just purchased my first Cox engine since 1963, an early Thermal Hopper 0.049. I build vintage speed planes and the engine will be going into a 1953 Magna Models 1/2A speed ship. As some may know, the Magna's are an all-magnesium fuselage/cowl & stab with aluminum-skin wings. The model will be for display because of the rarity.

I will need to reduce the outside diameter of the cylinder /head in order for it to fit inside the magnesium engine cowl.
Questions:
1) Is there a recommended minimum-diameter dimension for this procedure, in order to eliminate over-heating?
2) Other than gingerly chucking-up the cylinder in the lathe and hoping not to distort it, does someone have an easier, yet accurate method of doing this?

Thanks!
Kirk
.........Is it just the GLOW PLUG you are wanting to reduce ?????
getback
getback
Top Poster
Top Poster

2022 Supporter

2023 Supporter

Posts : 10028
Join date : 2013-01-18
Age : 66
Location : julian , NC

Back to top Go down

Thermal Hopper - Cylinder Fin Reduction. Empty Re: Thermal Hopper - Cylinder Fin Reduction.

Post  Admin Sat Feb 21, 2015 4:39 pm

Welcome to the forum!

Are you planning on turning the fins off like on this Tee Dee?

Thermal Hopper - Cylinder Fin Reduction. Jason_10
Customized TD .049


If the cylinder uses a small diameter head, you may want to consider using an early #2 cylinder (as used on early Babe Bees). Finding replacement heads (if the engine is ever put into use) would be much easier and plus you could preserve the original parts if needed for other projects. In Feb of 1956, Cox switched over from the small dia. heads to the current heads.

_________________
-Jacob


Admin
Admin
Administrator

Posts : 6392
Join date : 2010-07-27
Location : Roseville, Minnesota

http://sites.google.com/site/coxenginecollection/

Back to top Go down

Thermal Hopper - Cylinder Fin Reduction. Empty Re: Thermal Hopper - Cylinder Fin Reduction.

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