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Thread: Wheel ski design

  1. #161
    Tim's Avatar
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    Quote Originally Posted by Bearhawk Builder View Post
    No skis yet. ��
    If mine work you can use my Aero 2000s for your Cub
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  2. #162
    Bearhawk Builder's Avatar
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    Tim, How are the skis working??

  3. #163
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    Quote Originally Posted by Bearhawk Builder View Post
    Tim, How are the skis working??

    Haven't tried them yet. Cold and windy. and I sliced a finger half off on a cotter key. Soon

  4. #164
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    Quote Originally Posted by Tim View Post
    Haven't tried them yet. Cold and windy. and I sliced a finger half off on a cotter key. Soon
    got any pictures? .....of the finger?
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  5. #165
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    Quote Originally Posted by Tim View Post
    Haven't tried them yet. Cold and windy. and I sliced a finger half off on a cotter key. Soon
    Wow, I thought I heard all the excuses when I called yesterday Mr Carter.

    Glenn
    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"

  6. #166
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    Quote Originally Posted by Dave Calkins View Post
    got any pictures? .....of the finger?
    No, it's still bandaged up, I'm afraid to look
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  7. #167
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    Has anybody run a set of LW2500 skis on a Pa-22-20, I also don't see a STC for them, I would guess a field approval would be the way I'll have. To go. Any help would be appreciated, thanks.

  8. #168
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    Tim
    skis look awesome great work. Did you weigh one ski? what kind of 12v actuator did you use? I suppose now that you are ramping up production, that will be proprietary info.. Put me down for 2 sets, we can work out the price later.

    What will the name of your ski manufacturing co be? I hope not "9 finger aircraft skis" I have a finger that wont heal up from a cut, kinda tough when you use them all day. Glenn and Pete will come up with a good company name

    Jim
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  9. #169
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    I just bought a spare linear actuator for my Datums, (like having a spare prop, it means I'll never need it) from this outfit: www.surpluscenter.com They had many different types/sizes and their prices have always been very good, as is their service, been dealing with them for 30 years or more.

  10. #170
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    Quote Originally Posted by courierguy View Post
    I just bought a spare linear actuator for my Datums, (like having a spare prop, it means I'll never need it) from this outfit: www.surpluscenter.com They had many different types/sizes and their prices have always been very good, as is their service, been dealing with them for 30 years or more.
    surplus center. looks like a good resource.

    please give a link to the actuator you purchased for the datums skis. thanks!

  11. #171
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    Quote Originally Posted by Dave Calkins View Post
    surplus center. looks like a good resource.

    please give a link to the actuator you purchased for the datums skis. thanks!
    I got one of the 5-1896-10 actuators (their item number), not identical to the ones I now have, but close enough I believe to work. I may use it first to electrify my tractor's snowthrower chute, design in progress. At least I ddn't have to pay customs!
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  12. #172
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    Quote Originally Posted by Dave Calkins View Post
    got any pictures? .....of the finger?
    Your going to be sorry you asked. I offered advice to him on doctoring cuts, I work with glass so it's a daily routine. He doesn't listen

    Glenn
    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"
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  13. #173
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    Quote Originally Posted by Dave Calkins View Post
    got any pictures? .....of the finger?
    Dave you asked

    Click image for larger version. 

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    All bandaged up again

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  14. #174
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    Quote Originally Posted by Tim View Post
    Dave you asked

    Click image for larger version. 

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    All bandaged up again

    Click image for larger version. 

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    Your killing that thing, let it out so it can breath

    Glenn
    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"

  15. #175
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    Quote Originally Posted by Tim View Post
    Dave you asked

    Click image for larger version. 

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    All bandaged up again

    Click image for larger version. 

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    Well.......at least you didn't drop a truck on your face this time

    Glenn
    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"
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  16. #176
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    Sheesh!!

    Tim, you gotta wash things up once in a while. yikes almighty!!!!
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  17. #177
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    Quote Originally Posted by Dave Calkins View Post
    got any pictures? .....of the finger?
    Ahhh geeeezzz, that is not what I wanted to look at!

    Dave, NO soup for you, 6 months, for asking for pictures!

  18. #178
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    tough to tell from all the coagulated blood, but he will probably survive. I am not a people doctor fyi

  19. #179
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    Quote Originally Posted by thunderhead85 View Post
    MTV I used Heavy duty electric actuators that push/pull 800lbs and cycle on the ground no problem. I haven't tried cycling them at gross weight.
    A couple people have told me a good sheet metal guy could make the tunnel using a bead roller...Not sure. The tunnels were the hardest part.

    Bought a pair of Fluidyne 3000 Fli-Lite. I only need to change plastic bottoms and built some brackets so they fit my landing gear axles...

    I don't like the idea of running oil lines and pump into the plane..
    I've been thinking to run them electric and I would like to cycle them on the ground.

    What electric actuators do you use?
    Or a 12v mini double acting hydraulic power unit that I could mount outside the airplane?

    Any issue or concern ??


    Thanks!








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  20. #180
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    https://www.progressiveautomations.c...inear-actuator. I have not used these yet but It is what I am going to with the next failure of my current ones. Available in lengths of 1” increments with externally adjustable limit switches. Odd lengths of travel are a + $75 charge as I recall, I do not know why. 850 or 2000 lbs of force. All steel gearing, no plastic junk. My recommendation.
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  21. #181
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    Can't remember what Jean-Marc uses on the Datum skis but they are very strong. They'll pull a 2600 lb Bearhawk up on the ground. Maybe give him a call, you can even speak French!

  22. #182
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    I used the same actuators as thunderhead did. They say 800 lbs. They're made in China so who knows. With my 2 +2 and full fuel it takes 400 lbs to pull the plate under the tire, I built a contraption to measure the pull. I'll get a pic. Of them today and post it. I got them off Amazon

    Tim

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  23. #183
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    https://www.hiwin.com/linear-actuators.html Datum uses the LAN4 series. At least on some skis.

  24. #184
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    After several years, I have a few techniques to make life easier for my Datum skis actuators. I try to not wheel taxi up to a berm and then make them pull they plane onto the skis while in effect climbing uphill, things like that. Keeping the telescoping tubes of the ski retraction mechanism cleaned and lubed (silicone spray is best) helps a lot, as does the slop or tightness of the tubes. The skis themselves seem to be bulletproof. Weight, cost, and power consumption are the balancing points between going way overkill on the actuators. Let's all remember.....Jean Marc of Datum deserves some credit for coming up with the concept of using linear actuators for the motive power, as far as I know anyway.

  25. #185

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    Bad Idea. Hand pump allows one wheel to come down by holding brake on opposite wheel. Hand pump also tells you if you if hydraulic leak. I have electric pump on my airless skis on my 180 hp cub. Hand pump on the C-2200 federal. I''ve had nothing but problems wit the electric and it has been r4placed 3 times. Poor quality control. 206 amphibious with electric pump was always flawless. It also had had pump which I only had to use once.


    sandy

  26. #186
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    This is the actuator I use. Iv had them 2 winter's and many cycles no problem so far. Having said that I have a spare I keep in the plane. It would only take 5 minutes to change. The only problem with the better actuators made here is the weight, they weight is about 3 times of the ones I use.Click image for larger version. 

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  27. #187
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    I forget to mention they're on separate switches, so I can have one tire down to turn around in tight places

    Sent from my Pixel 2 using SuperCub.Org mobile app
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  28. #188
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    Quote Originally Posted by Tim View Post
    I forget to mention they're on separate switches, so I can have one tire down to turn around in tight places

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    Same here, two switches.
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  29. #189
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    Quote Originally Posted by Tim View Post
    This is the actuator I use. Iv had them 2 winter's and many cycles no problem so far. The only problem with the better actuators made here is the weight, they weight is about 3 times of the ones I use.
    I've look rapidly but I can't seem to find them!

    Do you know the approximate weight of those?


    Thanks again

  30. #190
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    I think about 3 pounds

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  31. #191
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    Quote Originally Posted by Olibuilt View Post
    Bought a pair of Fluidyne 3000 Fli-Lite. I only need to change plastic bottoms and built some brackets so they fit my landing gear axles...

    I don't like the idea of running oil lines and pump into the plane..
    I've been thinking to run them electric and I would like to cycle them on the ground.

    What electric actuators do you use?
    Or a 12v mini double acting hydraulic power unit that I could mount outside the airplane?

    Any issue or concern ??


    Thanks!








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    What's your concern with hydraulics? All that's inside (usually) is the pump. Most of us put the fluid reservoir on the engine side of the firewall. Very reliable.
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  32. #192
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    Quote Originally Posted by stewartb View Post
    What's your concern with hydraulics? All that's inside (usually) is the pump. Most of us put the fluid reservoir on the engine side of the firewall. Very reliable.
    I do not like the idea of rooting messy oil lines and installing an hydraulic pump inside the plane, and remove all that when spring season comes.. Maybe there is a way to do a clean and simple setup??


    Electric is very tempting, but looks heavy...

  33. #193
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    My hydraulic skis have been underwater several times. Once I got the airplane back on top they operated perfectly even in sub zero F temps. Electrics would concern me in that situation.
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  34. #194

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    Hydraulic is not messy if you do it right. I like the reservoir mounted on the hand pump - less piping and convenient to maintain. The only things to remove in the spring are the skis and pump, but a lot of people leave the pump in. Done it many times. Eazy-peezy.

  35. #195
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    Quote Originally Posted by Olibuilt View Post
    I do not like the idea of rooting messy oil lines and installing an hydraulic pump inside the plane, and remove all that when spring season comes.. Maybe there is a way to do a clean and simple setup??
    for installation on a covered plane, I like to take a AN834-4 TEE https://www.aircraftspruce.com/catal...ages/an834.php and weld to inlet part of a AN832D (cut the nut half off) https://www.aircraftspruce.com/catal...ages/an832.php that makes it long enough to fit from belly metal(false boot strip) through floor, and put a nut onto of floor..... those 2 tees are the only thing you leave in the plane in summer....

    just drill 2 holes.... much easier than plumbing under floor.... you cold also skip using TEEs and just do 4 separate ones if you wish to be able to only move one ski at a time... same method, just weld 2 strait bulkhead finings modified as above....
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  36. #196
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    Quote Originally Posted by stewartb View Post
    My hydraulic skis have been underwater several times. Once I got the airplane back on top they operated perfectly even in sub zero F temps. Electrics would concern me in that situation.
    Under water several times sounds like poor judgement to me

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  37. #197
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    Quote Originally Posted by Olibuilt View Post
    I do not like the idea of rooting messy oil lines and installing an hydraulic pump inside the plane, and remove all that when spring season comes.. Maybe there is a way to do a clean and simple setup??


    Electric is very tempting, but looks heavy...
    Take a light bulb and weight it when it's off, then weight it with it on. Lighter then oil.
    My Datums only have a 22 gauge wire running to them

    Glenn
    "Optimism is going after Moby Dick in a rowboat and taking the tartar sauce with you!"

  38. #198

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    Quote Originally Posted by Tim View Post
    Under water several times sounds like poor judgement to me

    Sent from my Pixel 2 using SuperCub.Org mobile app
    It's called "overflow", a somewhat common occurrence on frozen lakes and streams. Fly skis long enough, you'll find some, too.

  39. #199
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    Quote Originally Posted by Randyk View Post
    Hydraulic is not messy if you do it right. I like the reservoir mounted on the hand pump - less piping and convenient to maintain. The only things to remove in the spring are the skis and pump, but a lot of people leave the pump in. Done it many times. Eazy-peezy.
    What he said ^^^. I generally just removed the handle on the pump in summer and left the pump in place. Pumps don’t weigh that much, and there’s no mess.

    MTV
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  40. #200
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    I guess one thing that can be said about e power over hyd, is 2 switches on the panel take up less cabin room then a pump handle?

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