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

Logged in members see NO ADVERTISEMENTS!


Mounting screws for horseshoe backplate Cox_ba12




Mounting screws for horseshoe backplate Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» Dodge Viper - What a waste but brilliant marketing
by roddie Today at 6:46 pm

» COX .020 POWERED SPEEDSTER
by TD ABUSER Today at 6:32 pm

» **VOTE-ON-THE-NEXT-COX-ENGINE-OF-THE-MONTH** (November 2024)
by roddie Today at 6:13 pm

» Brushless motors?
by rsv1cox Today at 4:53 pm

» Free Flight Radio Assist
by rdw777 Today at 4:28 pm

» Cox 020 PeeWee rebuild questions
by balogh Today at 4:15 pm

» L4 Grasshopper
by latole Today at 3:43 pm

» PAW 80 and possible use
by fit90 Today at 8:36 am

» Music-wire bending tools (DIY video)
by 1975 control line guy Today at 8:32 am

» Ultrasonic Cleaners??
by sosam117 Yesterday at 11:26 am

» My CA or CyA (super glue) allergy
by rsv1cox Yesterday at 9:52 am

» My Pseudo killerbee.
by rsv1cox Yesterday at 7:04 am

Cox Engine of The Month
October-2024
MauricioB's

"Cox .049 Circa 1975, custom."



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


Mounting screws for horseshoe backplate Empty
Live on Patrol


Mounting screws for horseshoe backplate

Go down

Mounting screws for horseshoe backplate Empty Mounting screws for horseshoe backplate

Post  roddie Mon Apr 22, 2024 8:25 pm

The Cox .049 product-engine (horseshoe) backplate can be mounted with small wood screws obviously.. but what's worth doing.. is worth doing right... especially when it comes to securely mounting an engine in an airframe. That said.. the horseshoe backplate has X4 holes for mounting radially. The holes all have a .125" (1/8") inside diameter.. so your screw "body" (threaded portion and shank) can be that diameter or less. The screw "head" obviously needs to be a larger diameter.. but ideally between .180" and .200" diameter. Any "washers" used (flat, lock or otherwise) also cannot exceed that diameter.

I'm being a tad conservative with these measurements.. but take a look at the photo below; where I'm using 5-40 threaded hex-head "cap-screws" for mounting my engine to a bulkhead/plate.. and you'll see that there's no room for a washer that's any larger of a diameter.. than that of the screw-head.


Mounting screws for horseshoe backplate 5_cap-10
roddie
roddie
Top Poster
Top Poster

2024 Supporter

Posts : 8754
Join date : 2013-07-17
Age : 64
Location : N. Smithfield, Rhode Island

http://www.stilburnin.com

Back to top Go down

Mounting screws for horseshoe backplate Empty Re: Mounting screws for horseshoe backplate

Post  Greenman38633 Mon Apr 22, 2024 9:06 pm

Looks Good to me. No need for a washer is what I am thinking
Right ?
Greenman38633
Greenman38633
Gold Member
Gold Member

Posts : 151
Join date : 2024-02-05

Back to top Go down

Mounting screws for horseshoe backplate Empty Re: Mounting screws for horseshoe backplate

Post  roddie Mon Apr 22, 2024 11:17 pm

Greenman38633 wrote:Looks Good to me.  No need for a washer is what I am thinking
  Right ?

Correct.. not needed with screws shown.
roddie
roddie
Top Poster
Top Poster

2024 Supporter

Posts : 8754
Join date : 2013-07-17
Age : 64
Location : N. Smithfield, Rhode Island

http://www.stilburnin.com

Back to top Go down

Mounting screws for horseshoe backplate Empty Re: Mounting screws for horseshoe backplate

Post  KariFS Tue Apr 23, 2024 12:12 am

Spring-type lock washers are often about the same outer diameter as the head of the same size allen screw. I have used those in some tight spots that require a washer.

I like the horseshoe backplate especially because M3 bolts can be used, and being a DIN standard size, hardware like bolts, nuts, washers and especially captive nuts can be sourced easily. The #2 used in most other 049’s is about 2.2mm, hard to get anything except bolts and nuts, and even these I need to order. The slightly more common M2.5 won’t fit without drilling.


KariFS
KariFS
Diamond Member
Diamond Member

Posts : 2041
Join date : 2014-10-10
Age : 53

Back to top Go down

Mounting screws for horseshoe backplate Empty Re: Mounting screws for horseshoe backplate

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