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!


skis - skis for Winter flying Babe_b10
Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Cox Engine of The Month
July-2020
Kim's

"A Space Bug Goes for a Cruise"



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


skis - skis for Winter flying Empty

skis for Winter flying

Go down

skis - skis for Winter flying Empty skis for Winter flying

Post  roddie on Sun Oct 13, 2013 3:10 pm

Materials needed; .010" aluminum step flashing (x2 pcs. 6"L. x 3/4"W.) 2 popsicle sticks, 2 short lengths of sm. alloy tubing for axle tubes to fit your main gear axles, 2 sm. screw-eyes, double-stick foam tape and epoxy. Assembled weight per pr. is 8 gr.

Start by cutting (with scissors) the aluminum flashing to size, putting a radius on BOTH ends. For better "tracking" on soft snow; I chose to make "creases" in my skis using firm pressure with a scratch-awl/straight-edge, on alternate sides... I.E. "one" crease/ bottom-center and "two" creases on the top side, approx. 1/4" apart... FROM THE REAR FORWARD, approx. 5"... The remaining 1" of ski at the FRONT, will be "curled" slightly upward, for the tip.

The popsicle stick "beam" has an axle tube affixed with a blob of epoxy, slightly forward of the center. Drill a pilot hole at the REAR, approx. 3/8" from the end, and install the sm. screw eye. Cut x4 pcs. of foam tape to 3/8"W. x 3/4"L. and stick 2 pr. together to make 2 double thickness "pads"... (leave the protective liner on, until you're ready to stick the pads on the ski components, and clean areas where they will be applied, with an alcohol wipe) Stick one pad to the BOTTOM rear end of the beam and the same for the frt. The beam can now be mounted "on-center" to the ski.

This design provides some shock-absorbing action, and the "screw-eyes" are for attaching a string with a rubber-band looped around the planes tail-hook or tail-wheel bracket (or install a sm. notched dowel at the rear-bottom of the fuse. This keeps the skis from flopping around while flying.

skis - skis for Winter flying Skis-110
skis - skis for Winter flying Skis-210
skis - skis for Winter flying Skis-w10
skis - skis for Winter flying Barbie10
skis - skis for Winter flying Barbie11
skis - skis for Winter flying Barbie12
roddie
roddie
Top Poster
Top Poster

Posts : 6884
Join date : 2013-07-17
Age : 60
Location : N. Smithfield, Rhode Island

http://www.stilburnin.com

Back to top Go down

skis - skis for Winter flying Empty Re: skis for Winter flying

Post  duke.johnson on Mon Oct 14, 2013 9:11 am

I've wanted to put skies on something fo two or three years now. Maybe this is the year. Now watch, we won't get snow.
duke.johnson
duke.johnson
Diamond Member
Diamond Member

Posts : 1734
Join date : 2012-11-05
Age : 49
Location : Rochester, Washington

Back to top Go down

skis - skis for Winter flying Empty Re: skis for Winter flying

Post  Cribbs74 on Mon Oct 14, 2013 11:19 am

Very well done Roddie! I like those a lot.
Cribbs74
Cribbs74
Moderator

2019 Supporter

Trusted Seller
Posts : 10873
Join date : 2011-10-24
Age : 46
Location : Tuttle, OK

Back to top Go down

skis - skis for Winter flying Empty Re: skis for Winter flying

Post  roddie on Thu Oct 17, 2013 5:53 pm

A forum member sent a pm requesting a pair of skis, in trade for something. I was surprised... I should mail them before winter gets here. They could also be used for flight testing on asphalt... but not grass. The tether-string holds their pitch angle so the skis act as "skids" on the ground... and won't "wind-mill" during flight.

The ski's will pitch slightly "downward" at the front tips. A pair of mine have a 9 sq. in. surface area. How this will affect flight, depends on a few things. The ski-angle in a "tail-dragger" configuration won't vary too much, with the tether attached to the tailskid/tail-wheel. The frt. "ski-tip" radius/profile will have an alternate aerodynamic effect, than the rest of the ski. This "may" cancel-out the need for any "up-elevator" trimming for level flight... having little more "drag" than a pr. of wheels would.

skis - skis for Winter flying Fr-ice10
roddie
roddie
Top Poster
Top Poster

Posts : 6884
Join date : 2013-07-17
Age : 60
Location : N. Smithfield, Rhode Island

http://www.stilburnin.com

Back to top Go down

skis - skis for Winter flying Empty Re: skis for Winter flying

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top


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