Die spring specs.

[Rick and Cathy Ford]

For all

Here is the specifications of the die spring used for the coil spring suspension that was displayed at the builder's meeting at Brampton.


Landing gear die spring specifications
Manufacture: Danly
Type: Heavy Duty
Inside diameter: 1"
Outside diameter: 2"
Length: 10"
Catalog number: 9-3240-26S
Lbs. req’d to deflect 1/10th inch: 51.6
Total deflection recommended for long life: 1032lbs. - 2" deflection
Total deflection recommended for average life: 1290lbs. – 2.50" deflection
Maximum operating deflection: 1548lbs. – 3.00" deflection
Total travel to solid: 1875lbs. – 3.62" deflection
Under normal load, each spring is compressed about 1/2" - 5/8" while the Rebel is just sitting on the ground.
This equates to a long life for the spring before replacement.

Sprung-loaded,
Rick Ford
436R

[klehman]

Hi Rick

Weird numbers. I know your gear works fine and does not sag very much
so something must be amiss with the spring specs or maybe my math.

If I remember correctly, the ballpark numbers were something like spring
force is 1.7 times the weight on the wheel, even at 1 g weren't they?
(The multiplier would increase somewhat as the gear deflects and changes
the geometry) Say 800 lb per wheel at one g giving maybe 1400 lbs on the
spring at 1g. ?? I would have expected a spring that gives maybe 4000 lb
or so force at full compression...

Ken

Rick and Cathy Ford wrote:

Maximum operating deflection: 1548lbs.