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!


Pee Wee Horseshoe back plate - Page 2 Babe_b10
Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Cox Engine of The Month
July-2019
Mike1484's

"Tee Dee .020 on a free-flight model"



PAST WINNERS
Speed Contest 2019
CEF Traveling Engine

Win This Engine!
The Traveling Prop
Gallery


Pee Wee Horseshoe back plate - Page 2 Empty
World of Aviation

Pee Wee Horseshoe back plate

Page 2 of 6 Previous  1, 2, 3, 4, 5, 6  Next

Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  Jason_WI on Tue Feb 19, 2019 3:42 am


I'll find out tomorrow. Very Happy
Jason_WI
Jason_WI
Diamond Member
Diamond Member

I Support My Forum

Posts : 2650
Join date : 2011-10-09
Age : 44
Location : Neenah, WI

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  1/2A Nut on Tue Feb 19, 2019 3:56 am

Hehe yessa all set for a run up no doubt, did you bake it in the oven at 180 degs?
I read up on this less shrink ideal for non flex applications, good for up to 220F
That should do the trick, I think you have a winner here.

1/2A Nut
1/2A Nut
Diamond Member
Diamond Member

Posts : 2352
Join date : 2013-10-20
Age : 55
Location : Brad in Texas

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  Jason_WI on Tue Feb 19, 2019 4:01 am

Here are pics of the backplate on the engine. I polished the reed seal area with 400 grit. It seals nice and engine has a nice pop when turning over. So far no oil seepage from the backplate.

Pee Wee Horseshoe back plate - Page 2 203a6910
Pee Wee Horseshoe back plate - Page 2 Fe610810
Pee Wee Horseshoe back plate - Page 2 Aefb9f10
Pee Wee Horseshoe back plate - Page 2 17ad3010
Jason_WI
Jason_WI
Diamond Member
Diamond Member

I Support My Forum

Posts : 2650
Join date : 2011-10-09
Age : 44
Location : Neenah, WI

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  Admin on Tue Feb 19, 2019 4:04 am

That looks really cool! Thumbs Up

I can't wait for the test results bounce

_________________
-Jacob


Admin
Admin
Administrator

Posts : 4947
Join date : 2010-07-27
Location : Roseville, Minnesota

View user profile http://sites.google.com/site/coxenginecollection/

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  1/2A Nut on Tue Feb 19, 2019 4:07 am

Good job Jason Thumbs Up can always add two caskets to seal it up if push comes to shove.
The intake will need to be free of any possible ingestion of carbon scraps.
The stuff wears out applicator tips there is an alt. tip for this Carbon mix.
Hex head screws should do well to join the backplate to the crank case.
Post a running vid if you can.
Popcorn


Last edited by 1/2A Nut on Tue Feb 19, 2019 10:38 pm; edited 1 time in total
1/2A Nut
1/2A Nut
Diamond Member
Diamond Member

Posts : 2352
Join date : 2013-10-20
Age : 55
Location : Brad in Texas

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  getback on Tue Feb 19, 2019 7:48 am

That's Sweet !! I likeie the black to , Fingers crossed to hear some noise . Shh
getback
getback
Top Poster
Top Poster

Posts : 5984
Join date : 2013-01-18
Age : 61
Location : julian

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  NEW222 on Tue Feb 19, 2019 7:55 am

Very nice. I too like the black. Can't wait to see the test video or just hear of results.
NEW222
NEW222
Diamond Member
Diamond Member

Posts : 2191
Join date : 2011-08-13
Age : 40
Location : oakbank, mb

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  Jason_WI on Tue Feb 19, 2019 7:01 pm

Changed the intake area a bit. Got rid of that gear shape cutout and went with a funnel shaped inlet and another funnel shape where it necks down for the reed valve area. Hopefully the run tonight goes well and then I'll print this version to test.

Pee Wee Horseshoe back plate - Page 2 Intake10
Jason_WI
Jason_WI
Diamond Member
Diamond Member

I Support My Forum

Posts : 2650
Join date : 2011-10-09
Age : 44
Location : Neenah, WI

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  NEW222 on Tue Feb 19, 2019 7:44 pm

Hopefully the mods you made to the original work out good. I definately like the look of it.
NEW222
NEW222
Diamond Member
Diamond Member

Posts : 2191
Join date : 2011-08-13
Age : 40
Location : oakbank, mb

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  Jason_WI on Wed Feb 20, 2019 12:27 am

Pee Wee Horseshoe back plate - Page 2 F9269610


It ran until the nitro in the Cox super power fuel softened the ABS and the NVA was loose and the reed melted into the face of the reed seal area. So it shows promise just wrong material. I have carbon fiber nylon I can try. Also have POM or also called Acetal.

I only caught the last few seconds of the run but YouTube is being cranky. Here are pics of the meltage.

Pee Wee Horseshoe back plate - Page 2 08c4ea10
Pee Wee Horseshoe back plate - Page 2 1d37b810
Jason_WI
Jason_WI
Diamond Member
Diamond Member

I Support My Forum

Posts : 2650
Join date : 2011-10-09
Age : 44
Location : Neenah, WI

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  NEW222 on Wed Feb 20, 2019 7:46 am

Oops. But on the bright side, it did show promise and run!
NEW222
NEW222
Diamond Member
Diamond Member

Posts : 2191
Join date : 2011-08-13
Age : 40
Location : oakbank, mb

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  getback on Wed Feb 20, 2019 7:51 am

IT Ran !!! ++++ How was the short run ? Performance wise .
getback
getback
Top Poster
Top Poster

Posts : 5984
Join date : 2013-01-18
Age : 61
Location : julian

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  Jason_WI on Wed Feb 20, 2019 1:50 pm

I don’t know. By the time I got the needle set it was starting to die. Slowly melting.
Jason_WI
Jason_WI
Diamond Member
Diamond Member

I Support My Forum

Posts : 2650
Join date : 2011-10-09
Age : 44
Location : Neenah, WI

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  Cribbs74 on Wed Feb 20, 2019 6:52 pm

Well, now you know. How much is all this material costing you?
Cribbs74
Cribbs74
Moderator

Trusted Seller
Posts : 10415
Join date : 2011-10-24
Age : 45
Location : Tuttle, OK

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  Jason_WI on Wed Feb 20, 2019 6:59 pm

The CF ABS print above was 1.25 hours of print time and about $.30 of material. However it proved the concept worked so it wasn’t considered a failure. Just poor choice in material.

The CF nylon spool I have was a sample from a filament extruder that was free. PLA is about $.02 per gram. Standard DuPont Zytel is $.09 per gram.
Jason_WI
Jason_WI
Diamond Member
Diamond Member

I Support My Forum

Posts : 2650
Join date : 2011-10-09
Age : 44
Location : Neenah, WI

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  Cribbs74 on Wed Feb 20, 2019 11:16 pm

Could you possibly cut off small strips and test fuel compatibility before printing? Might save you time and a little money.
Cribbs74
Cribbs74
Moderator

Trusted Seller
Posts : 10415
Join date : 2011-10-24
Age : 45
Location : Tuttle, OK

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  ThermalSniffer on Fri Feb 22, 2019 12:22 am

Well done Jason! Excellent work.

I should really follow this forum more closely. I did some test mills on my hobby grade CNC machine last year with the same 020 backplate in mind. I was milling them out of a solid chunk of hdpe since that is what glow fuel bottles are made of. Unfortunately HDPE either melts or chips when being milled. Chips are what you want when milling HDPE but they lead to a lightly faceted texture all over the product which caused dimensional issues in the reed seat area. I also realised I hadn’t considered the heat from the running engine in my material choice.
ThermalSniffer
ThermalSniffer
Silver Member
Silver Member

Posts : 93
Join date : 2011-09-06
Location : England

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  Mike1484 on Fri Feb 22, 2019 8:55 am

What material are the .049 back plates made from ? Jason , these .020 horse shoe back plates are going to be the new hot thing in the Cox world . I would think nylon would work for these back plates .

Mike1484
Mike1484
Mike1484
Gold Member
Gold Member

Posts : 128
Join date : 2011-10-28
Location : Northern Ohio

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  ticomareado on Fri Feb 22, 2019 11:08 am

You dah man, Jason!
ticomareado
ticomareado
Platinum Member
Platinum Member

Posts : 672
Join date : 2013-10-03
Location : NC

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  ticomareado on Fri Feb 22, 2019 11:10 am

I guess the plastic should be the same Cox used on their PT-22s and .020 helicopters.
ticomareado
ticomareado
Platinum Member
Platinum Member

Posts : 672
Join date : 2013-10-03
Location : NC

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  Kim on Fri Feb 22, 2019 11:46 am

ticomareado wrote:You dah man, Jason!

TRUTH !!!!
We may have to petition the Admin to create a C.E.F. Hall of Fame !!!!
Kim
Kim
Top Poster
Top Poster

I Support My Forum

Posts : 6630
Join date : 2011-09-06
Location : South East Missouri

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  fit90 on Fri Feb 22, 2019 8:18 pm

Kim wrote:
ticomareado wrote:You dah man, Jason!

TRUTH !!!!
We may have to petition the Admin to create a C.E.F. Hall of Fame !!!!

I second the motion
fit90
fit90
Diamond Member
Diamond Member

Posts : 1297
Join date : 2011-08-11
Location : Naples, Florida

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  Jason_WI on Sun Feb 24, 2019 2:39 am

Sometimes things go bad when changing nozzle sizes on the 3D printer. Almost new .4 mm plated copper nozzle twisted off in the heat block. It started to squeak when tightening it up. I stopped and tried to turn it out and this happened. Good thing I have spares on hand.

Been fighting nylon and the .25mm nozzle all day. Jamming up. I tried to slow down the print speed without luck. Back to .4mm nozzle and .2mm layer height for the backplate with nylon.

Pee Wee Horseshoe back plate - Page 2 50156d10
Jason_WI
Jason_WI
Diamond Member
Diamond Member

I Support My Forum

Posts : 2650
Join date : 2011-10-09
Age : 44
Location : Neenah, WI

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  getback on Sun Feb 24, 2019 7:43 am

lol! lol! I seen that pic and thought man that back plate had a BAD melt down , well glad you had a back up , Hope you can get the nozzle size figured out for the right layering . Popcorn
getback
getback
Top Poster
Top Poster

Posts : 5984
Join date : 2013-01-18
Age : 61
Location : julian

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  rsv1cox on Sun Feb 24, 2019 7:50 am

That picture Jason resembles some of the engines I have been working on lately.

Bob
rsv1cox
rsv1cox
Top Poster
Top Poster

Posts : 4251
Join date : 2014-08-18
Location : West Virginia

View user profile

Back to top Go down

Pee Wee Horseshoe back plate - Page 2 Empty Re: Pee Wee Horseshoe back plate

Post  Sponsored content


Sponsored content


Back to top Go down

Page 2 of 6 Previous  1, 2, 3, 4, 5, 6  Next

Back to top

- Similar topics

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