Airless Tires for Military Vehicles

By John Farrier in Science & Tech, Weapons & War on Sep 10, 2009 at 7:54 pm


Photo: Resilient Technologies

Pneumatic tires take a lot of abuse in combat, which is why Resilient Technologies is trying to develop an airless tire. Because they can’t be punctured, vehicles equipped with such tires can stay mobile after taking damage that would incapacitate others:

The Wisconsin design breakthrough, first developed by Resilient’s in-house design and development team, takes a page from nature. “The goal was to reduce the variation in the stiffness of the tire, to make it transmit loads uniformly and become more homogenous,” Osswald says. “And the best design, as nature gives it to us, is really the honeycomb.”….

The patent-pending Resilient design relies on a precise pattern of six-sided cells that are arranged, like a honeycomb, in a way that best mimics the “ride feel” of pneumatic tires. The honeycomb geometry also does a great job of reducing noise levels and reducing heat generated during usage – two common problems with past applications.

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  1. Geekazoid
    Sep 10th, 2009 at 8:03 pm

    I wonder if they got inspiration from this (though it’s not ‘honeycomb’ design):

    http://auto.howstuffworks.com/tweel-airless-tire.htm

  2. lannaxe96
    Sep 10th, 2009 at 11:00 pm

    They have had these types of tires in the military for years already. If they get damaged, they re-inflate. Same concept. I highly doubt the soldiers care what their tires look like. The ones now work just fine.

  3. Alex
    Sep 11th, 2009 at 12:43 am

    Pfft! America’s best selling car already has flat-proof tires …

  4. Skipweasel
    Sep 11th, 2009 at 3:01 am

    Airless tyres aren’t new – this an old idea developed a bit. I love the way companies claim what they’re doing is New and Revolutionary when it’s been done decades before.

  5. Larfin Jackarse
    Sep 11th, 2009 at 3:51 am

    I was going to add these things have been new for 20? 30? years….but Von SkippenViesel beat me to it.

  6. DeLuxe
    Sep 11th, 2009 at 4:48 am

    “Airless tyres aren’t new” D’uh!
    Of course not: all tires were airless before John Dunlop invented the air filled tyre and tube in 1888.

    Since air tyres have many advantages above ‘solid’ ones, they are preferred for most usuge. However, as stated in the article above, running flat isn’t one of them.

    Hence, the world is still developing an airless tyre with as many of the pros of an inflatable tyre, without as many of the cons. And the major con is their driving behaviour.

    So: Yes, there have been and were airless tyres before, but this is supposed to be an improvement on exactly THAT concept.

    I mean: cars have been around for 125 years, and they have been improved over time. “Cars aren’t new…” *sigh*

  7. Skipweasel
    Sep 11th, 2009 at 6:21 am

    DeLuxe – yes, but specifically this sort of lattice structure to replace the springing effect of air isn’t new. Someone’s already pointed out the Tweel and there are other examples of prior art, too.

  8. Nicholas Dollak
    Sep 11th, 2009 at 7:34 am

    I’ve suspected for decades that a spongy lattice would probably make a tire impervious to flats. I inquired about this, and was always met with puzzled looks and “Never saw nothin’ like that.” I figured that the reason we don’t use them is because such tires would be too heavy, or grow too hot, make the ride too bumpy, or would have no problems but reduce tire sales due to greater efficiency. Only 35 seconds ago I’m discovering that such tires have been around for some time! I HATE being kept out-of-the-loop like that. I currently drive a 1999 Hyundai Accent. Is it possible for me to get flat-proof tires for it? If so, where would I look?

  9. Morz
    Sep 11th, 2009 at 8:40 am

    Curious to dig up the patent application, considering the Tweel pretty much constitutes prior art, and the Tweel might have a patent of its own.

  10. brett maxwell
    Sep 11th, 2009 at 10:11 am

    i can’t imagine this will ever be as cost effective as inflated tires, but for specific purposes like military vehicles it makes a lot of sense.

  11. amd
    Sep 11th, 2009 at 10:24 am

    not sure the idea of an airless tire can be patented but the visual design can, and the structure in how it is made can as well. thats why we see 2 entirely different designs from the this to the twill. but we still have not seen a peppermint candy spiral strip or a spiderweb design, which would work as well.

  12. Jimbo
    Sep 11th, 2009 at 12:05 pm

    Has any of you ever drove with a tire out of balance? Just think what will happen when mud gets packed in that wheel.

  13. Christophe
    Sep 11th, 2009 at 12:29 pm

    LOL Alex ;)

  14. Foreigner1
    Sep 11th, 2009 at 1:32 pm

    Brett maxwell this kind of tires can be highly cost-effective, because the chosen cell-pattern can be made with an extruder as a near endless compartmented tube with threads and all. That tube can be cut to pieces and then fitted on axles. That is a way to mass-produce and to cheaply make LOTS of tires at a fraction of the compexity of conventional tires.

    Jimbo this kind of tires is mainly for heavy-duty use- so not the high speeds of 65mls p/h and higher, but rather the lower speeds of military use during patrols and off-road actions. Some inbalance in such wheels is barely an issue at such speeds.

  15. JustinButNotTHATJustin
    Sep 11th, 2009 at 5:24 pm

    Favoid pattern again, anyone?

  16. Thebes
    Sep 11th, 2009 at 9:20 pm

    Better put some sidewalls on those things. Around here that honeycomb would get clogged with mud and gravel, which would tear it up pretty quickly.

  17. renderanything
    Sep 11th, 2009 at 11:16 pm

    Okay, so most anyone with a moderate knowledge of automobile history will likely know about solid rubber tires and their precursory role in relation to the pneumatic variety.

    I find it interesting that this same latticed concept of solid/flexible hybrid has also been around nearly as long.

    Behold the Trublproof tire from 1920, via the Shorpy blog:
    http://www.shorpy.com/node/5270?size=_original


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