Easy-to-build steerable nosewheel?

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Hugh Lorimer

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Thanks for all your inputs to the forum Hugh, sorry you aren't continuing with it all, some interesting stuff.

How about this for a simplified retract nose wheel idea as used on an FAI Team Race model years ago. Worked well, Hughie.............
 

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deskpilot

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Hi Hughie, like your simple design. Much easier than the one I came up with. FWIW, I'm working on a slightly larger version of Hughie's Sgian Dobh. Please don't get side tracked on this thread. Here's a video of my in operation, as interpreted by a fellow who sorted the SketchyPhysics for me. He mis-understood the reason for the grass patch which was supposed to go down, thus unlocking the over-center lock-

http://sketchucation.com/click.php?url=https://www.youtube.com/watch?v=qw2C9goxbNk

My method of strength testing, load it with a couple hundred kilos and drop it from 3 feet. Not actually modelled but leg will be spring steel core wrapped in f/glass.
 

bmcj

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Oops, it seems we have two nosegear threads... I meant to post this here:

Speaking of nosegear designs and shimmy, why not build a trailing link nosegear suspension with two smaller struts (left and right) configured to provide suspension and shimmy damping at the same time?
 

bmcj

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bmcj, not sure if you're referring to my design or making a general statement. FWIW, in my case, weight is the enemy so dampened s/steel, plus low pressure tyre would be lighter than twin struts and dampers. Make sense?
That makes sense, and my suggestion was a general statement, not directed at your concepts.
 

cluttonfred

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If by scooter you mean motor scooter (Honda, Yamaha, etc.) I suspect that it will be far too heavy for an aviation application. The integrated suspension and front brake might be interesting for rough field work, though.
 

henryk

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If by scooter you mean motor scooter (Honda, Yamaha, etc.) I suspect that it will be far too heavy for an aviation application. The integrated suspension and front brake might be interesting for rough field work, though.

-my solution=self made steel fork with pressured air "spring" +oil dampfer=3.2 kg

002.jpg 581.jpg 576.jpg
 

spduffee

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Hey Matthew,

I just saw this on a website that features an HM 420- build. I had never heard of this Flea before, all metal cage, low to the ground (wheelchair accessible). Anyway, this particular build has a nice nosegear, I think.

Crosswinds

hm420_3.jpg
 

spduffee

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Very welcome. I may have to look into this closer. I went flying around the Olympic Mtns today in a club's C150. Even with full cabin heat it was cold at 6500', less than 20deg outside temp.. Maybe I am a enclosed cabin kinda guy, afterall...:cry: Plus I did my first spot of welding today, ever. With that behind me I really feel I am now able to start welding a fuselage.:ban:
 

FritzW

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...they say "by the time you finishing tacking a fuselage together, you'll have the skill to finish weld it";)
 

Hugh Lorimer

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Mock up in wood of easily made castoring retracting nose wheel made from 1" sq steel tube with locking knee (inc.coil spring biased to aid over centre locking). Bushed main leg for free castoring steering head ( vertical pivot)

Hughie
 

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cluttonfred

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Old thread, new question....

With this sort simple trailing, free-swiveling nosewheel, would it be useful to add some sort of skid at the front to prevent the nosewheel digging in during a hard landing and/or on a soft field? In the case of this specific Belite wheel, that could be as simple as extending the fork side plates and nylon spacers forward and cutting then off in a semicircular curve or at a 45-degree angle.

belite nosewheel.jpg
 

Vigilant1

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Old thread, new question....

With this sort simple trailing, free-swiveling nosewheel, would it be useful to add some sort of skid at the front to prevent the nosewheel digging in during a hard landing and/or on a soft field? In the case of this specific Belite wheel, that could be as simple as extending the fork side plates and nylon spacers forward and cutting then off in a semicircular curve or at a 45-degree angle.

View attachment 110988
It doesn't seem adding a skid could do any harm, and could help, as long as it didn't go much lower than the existing bracket.
If the tire was completely flat/gone, it doesn't look like that fitting would be far above the pavement/turf.
 

bifft

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With this sort simple trailing, free-swiveling nosewheel, would it be useful to add some sort of skid at the front to prevent the nosewheel digging in during a hard landing and/or on a soft field?

Lots of the RV guys do that. Here's a commercial example: The Lip Skid

Not enough data on installed examples vs. accidents to know if it helps or not.
 

BJC

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With this sort simple trailing, free-swiveling nosewheel, would it be useful to add some sort of skid at the front to prevent the nosewheel digging in during a hard landing and/or on a soft field?
The serious accidents have been from broken nose gear legs that stuck into the ground and put the airplane on its back. The best prevention is proper piloting technique. There is not much difference between proper tailwheel technique and training wheel technique.

BJC
 
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