Hi All,

Who are making the best brakes for jets?

Which one is most economical for smaller jets with 18 lbs of thrust or less?

Disc brakes or Drum brakes? Which one is more effective?

My jets' wheels are getting flat spots because the brakes are locking up too soon? Any suggestions? I hate to see my jets going tail spin during braking due to uneven brake pressure.

Thanks,

Mike

Hi Mike

You may want to check out the Trim line of wheels and brakes. We have a number of customers in your area who use them. Check out this link: [link=http://s43500.sites99.storefront-hosting.com/TrimSelectionGuide.aspx]Trim Wheel Guide[/link]

I have used Trim wheels and brakes, that I got from GNM, on my EuroSport for almost 400 flights. They are still holding up, and I like the price/quality relation. They are good value for money. The valve i a bit hard to adjust, but once set up right, it works fine.

Hi Mike how about greasing the hub inside ?

If you don't grease the hubs no matter which valve you buy you will keep getting flatspots.


Just my $0.02 .............................. Johnny H.

I'm with Johnny, I would be lubing the drum. What brake valve? This may have more to do with your problem than the brakes themselves.

HI All,

Thank you for your advises. What are the best lube materials for the wheel hub? I am thinking about using turbine oil for that.

Thanks,

Mike

Mike... What brand of wheels/brakes??? What Brake valve?

Don't use turbine oil. Some guys use Vaseline, some use the overpriced lube BVM sells. I use automotive silicone grease. Just about any silicone or synthetic grease will work fine. A petroteum based grease (like Vaseline) will cause the 0-rings to swell.

Joe

Again...REALLY depends on the brand of brakes! Airpower for example dont do well greased, intairco dont do well with petroleum or automotive type silicone. The "overpriced lube BVM sells" is Parker Super O-Ring lube which works better than most other types of lubricants and is completely compatible with Oring type brakes. It Lubricates without deterioration of synthetic rubber. Do a seach for this product and I think you will find his price is in-line. Other options are; Krytox made by DuPont and Clearco 100M "O" Ring Lubricant but both products are comparable in price.

Vaseline will not all O-rings swell. Some materials will swell, some not. I know that Buna-N O-rings are perfectly compatible with Vaseline. Been using it on Trim brakes with Buna-N O-rings.

I'm sure Parker Super O Ring is a fine product and works well. My point is that $6.75 is a lot to pay for a 1/2 oz. tube of grease. While that price may be in line with some other exotic lubricants there is nothing about a rubber o-ring rubbing against an aluminum hub that warrants the use of an exotic high tech lubricant. Any silicone based grease will lubricate with out deterioration of rubber components.

If you read your attachment it says that the Parker lube is good for; a wide temperature range, a variety of fluid media, 30 micron filters, high pressure or vacuum systems, etc. These jet bake systems don't contain exotic materials nor are they exposed to extreme environmental conditions. Anyone using this on their brake system is simply paying for more than they need.

I'll concede the point that $6.75 is not a lot of money compared to the thousands we have tied up in these jets. I don't have any experience with the disk type brakes. The automotive silicone grease works just fine on my BVM brakes and I don't believing in paying for more than I need. Of course that's just my opinion, I'm sure some will disagree or have a higher perceived need.

Joe

Exactly my point in using Vaseline with Buna-N O-rings. Works fine and don't cost jack!

Let me clarify... Some of the brands, in my experience, do show signs of deterioration with the use of simple petrolem products. Parker (or the other brands listed)will not have any negative affect on any of the brands of O-ring type brakes (that I am aware of). IMO, at 6.75 it is worth the cost of the tube for the assurance that it will not deteriorate my brake components. One tube will last you a decade or longer with the amount we require.
Just my .02

Vaseline, lube, grease ... ? Seems counterintuitive to put slippery stuff in the midst of a system that depends on friction to function. As I recall, [link=http://www.glennis.com/brake.htm]Glennis Aircraft[/link] brakes don't need grease to function properly or consistently.

Mike

The Glennis ones I had needed it BAD! Lots of flat spots if I did not use grease. The grease just prevents lock-ups (apparently).

The reason for brake locking is excessive air pressure and the wrong set up on the brakes.

The brakes don't require any type of grease - and it should not be used. It attracts dirts and debris and bad news.

Dennis

I use the same air source for retracts & brakes (if my gear don't come down, what do I care if I have brakes or not?), so I am definitely not going to run a low pressure just for the brakes, with all of the extra effort that entails. Besides, why bother? The Trim wheels & brakes work just fine, greased, at around 100 psi.

Woketman !!!

are you coming for FL Jets ??? haven't seen you in ages man.


Johnny Hernandez

Hi All:

My brakes systems are

1. Trim wheels' - I'd put some silicone grease but somehow I am getting black compound around the axis after a few flight.

2. Airpower disc brakes - It's kind of tight when I step on the brake, so I think adding some grease to prevent lock up would be nice.


About the brake control setup.

What's your preferred radio setup for the brake?

I am more comfortable with the down elevator stick control, but my instructor wants me do set it up on the right lever. However, I fly with 2 fingers on each control stick, so I am not comfortable with that setup. Just wondering what yours are.

I am thinking about using a push botton on my TX, so I can click the botton to simulate anti lock, just for the fun of it.

Any suggestions,

Thanks,

Mike

Hi Mike,

that's really up to your comfort. I personally have my brakes setup on the down elev position and when gear is retracted brake channel is turned off.


Johnny Hernandez

Huh? [sm=confused.gif]

HI all, I have my brakes setup for proportional on my right slider and full brakes on my snaproll button JR10x, since my brakes have lubricated, they will not lock up. I very quickly wore out a set of tires on my Hotspot when they where not greased.
Rcpete

And there is the point - not the brakes fault, but a setup problem - the instructions specifically state 40lbs. air. For simply running lower pressure you eliminate the constant greasing and trying to find the right grease, etc. In order to run a seperate tank, there is no effort than simply installing a tank - all of the other plumbing is the same, so it is no big project.

You should always run an extra tank for brakes - regardless of mfg., this way neither system compromises the other. You can easily have a leak on the "down" side of the retracts, and not have brakes when you land - then you will care very much, especially if it becomes a safety issue at some point.

Dennis

I have mine set on the RH slide and down elev too. V..

I disagree. The two systems only increase the odds that I will get a leak at any given time. Its a 50-50 shot if its in the gear or the brake system. And I have no idea what constant greasing you are referring to. Even back when I was flying every weekend, I don't think I had to grease the Trims more than once a year and they worked perfectly! One air system, grease 'em in the Spring and fly. Simple!

Johnny, I wish, but we are now heavily into Return To Flight II. Should let up for me this spring so I hope to make it to MS Afterburner! See you there?