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aircraft wheel brakes

Old 09-07-2009, 05:16 PM
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jamiechip
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Default aircraft wheel brakes

has anyone out there have any pics of a air powered brake for the wheels of the jets or break downs to explain how they work i am looking to machine up my own smaller set for a small turbine project but really need some help i normaly would not worry about it but under australian rules i belive from what i have been told you must have brakes on all turbine jets so i feel that machineing up my own small set would be the way to go anyone that can help that would be great or sheed some light on the rules a little more

thanks
regards jamie
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Old 09-07-2009, 05:32 PM
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rcjetsaok
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Default RE: aircraft wheel brakes

BVM.... The only way to fly !!!!! (and stop ). His website some pics, but you might want to contact one of his Reps for more info.. You get what you pay for !!


Good luck,

Danno
Old 09-07-2009, 05:33 PM
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Default RE: aircraft wheel brakes

Old 09-07-2009, 06:59 PM
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limeybob
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Default RE: aircraft wheel brakes

O-ring has to be a tight fit in the groove. Use a lubricant to roll them in.
Had to retrofit some Chinese brakes, took three tries to get the right size.
bob
Old 09-07-2009, 07:16 PM
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jamiechip
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Default RE: aircraft wheel brakes

thanks for that info looks like something easy enough to manufacture ill give it a go i thought it would be as simple as that ill update on how i go with it
Old 09-07-2009, 07:18 PM
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jamiechip
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Default RE: aircraft wheel brakes

in some of the other pics there are diferent types of these brakes ofcourse the oring seams the easiest is there any other way of doing it that is easy enough to manufacture ?
Old 09-07-2009, 07:49 PM
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PaulD
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Default RE: aircraft wheel brakes

Make sure you get the surface finish right in the 0-ring grove or they'll be leakin' in no time.

I like the BVM idea as there is no axial load on the wheel hubs. I have a set of Behotec gear and although the brakes work very well they do push sideways (axial) on the wheels and do not completely free up right away.

PaulD
Old 09-07-2009, 08:04 PM
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Default RE: aircraft wheel brakes

ORIGINAL: jamiechip

under australian rules i belive from what i have been told you must have brakes on all turbine jets

thanks
regards jamie

Hi Jamie,

The current Australian MAAA turbine operation rules here in Australia; http://www.maaa.asn.au/maaa/mop/proc...Feb%202003.pdf

These rules do not specify brakes as a requirement, however they are a very good idea on any turbine model. I use BVM brakes, and they work very well. (I wish I had the skill to maunfacture my own).. Good luck with your project.

Roger
Old 09-09-2009, 05:17 AM
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jamiechip
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Default RE: aircraft wheel brakes

after talking to a mate he said that the model must not roll with static thrust wich makes sence of course and i think brakes are a good option

does anyone know where to find the liquid rubber for the tyres i know they are molded from liquid i just beed to fing it a bit of searching has turned up nothing any help would be great
Old 09-09-2009, 05:26 AM
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bcovish
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Default RE: aircraft wheel brakes

Do a google search "liquid rubber" and a lot comes up.
Old 09-09-2009, 06:13 AM
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jamiechip
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Default RE: aircraft wheel brakes

i do the search all i get is compunds to do coatings not for the actual tyres if anyone knows what they call the rubber that might help
Old 09-09-2009, 09:32 AM
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Default RE: aircraft wheel brakes

Tom Cook at JMP has the best brakes.

Glen.
Old 09-09-2009, 01:04 PM
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Default RE: aircraft wheel brakes

The problem with O ring brakes is they only push out in the area of the piston so the braking effect is only in two or maybe four places around the wheel, have a look at the Digitech brakes they are a bladder which pushes a plate onto a disc of brake material inside the wheel, only perceived problem is that your wheel could be pushed off it not fitted correctly.

Mike
Old 09-09-2009, 03:42 PM
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Eric Maydon
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Default RE: aircraft wheel brakes

Hi there

Exactly the same system as Glennis Aircraft uses. Faultless after many years service.

Eric
Old 09-09-2009, 04:03 PM
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jamiechip
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Default RE: aircraft wheel brakes

anyone got pics of this system or break down pics on how they work and go together
Old 09-09-2009, 04:34 PM
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Vincent
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Default RE: aircraft wheel brakes

Mike,
Intarico i believe uses three pistons that push up against the oring. They do not work well on the bigger wheels i have found. BVM and some others use just an oring and it expands all the way around to put equal pressure.
V..
Old 09-09-2009, 06:06 PM
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lov2flyrc
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Default RE: aircraft wheel brakes

Airpower wheels ("Digitech" are Airpower wheels) use a bladder as shown below to press their disc outward into the wheel hub. Very simple but effective unit.





Old 09-09-2009, 07:14 PM
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rcpete347
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Default RE: aircraft wheel brakes

Intarico does use 3 pistons that push against a rubber band and the wheel hub. I think they are useless on larger wheels, like my Comp Arf Lightning.
Rcpete
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Old 09-09-2009, 10:38 PM
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causeitflies
 
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Default RE: aircraft wheel brakes

They are adequate for the smaller Flash but the ones I really like are the Skymaster disk brakes. (Sorry for the out of focus. I only took one pic real quick while working on the plane)
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Old 09-12-2009, 05:35 PM
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jamiechip
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Default RE: aircraft wheel brakes

one thing im still trying to find is the rubber for makeing wheels is there anyone out there that has made some or know of what rubber and where to find it ?
Old 09-14-2009, 05:47 AM
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Default RE: aircraft wheel brakes

Hi,
I have a lot of experiences from O-ring brakes. If manufcatured with right tolerances the performance is so good that you will get flat tires!!
Use the O-ring manufactures data tabel to get the right measurements. Make sure the surface where the O-ring will be busy is very smoth. After turning the hub (slot where O-ring will be busy) use fine grid and after that polish the surface with some "polishing rubbing blend". I recomend the tolerances from the O-ring to the slot in the wheel hub to be -2 to -3 /10 mm.
Lubricate the O-ring whit some cristaline stuff.
Pipe

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