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Question re: Lubrication on C-ARF UL Brakes

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Old 11-04-2012, 08:10 PM
  #1
sskianpour
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Default Question re: Lubrication on C-ARF UL Brakes

Hi All, see photo here.

I bought an UL from a great guy. He converted gear to Pro-Links from Todd, but I "think" that he kept the original COMP-ARF wheels and brakes (they look similar to the COMP-ARF Tutor's baking system that I used to own).

Well, these brakes work great. TOO well in fact, the wheels lock up and flat spot. I usually put a drop or two of Parker Super O-Lube on my BVM wheels and brakes and it helps the brakes not lock up. However I have read somewhere that COMP-ARF specifically says DO NOT use any lubrication. In fact, when I used just a couple of drops on my Tutor wheels and brakes, it practically ruined them as braking power went down to near nothing and no matter how many times I wiped the brakes and inside rim, they were never that strong again.

So here are the questions:

1. ARE THESE the COMP-ARF wheels and brakes?
2. Without saying "switch out your wheel and brake system" or "use an air-line restrictor", can you please advise as to WHAT KIND of lubricant I should use to get a little less braking and locking up?

I just want a simple suggestion as to what people use that helps the wheels turn a bit more while braking without ruining my braking system totally with the wrong lube and without having to switch out my current setup.

Thanks in advance!

Shaz
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Old 11-04-2012, 08:13 PM
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Default RE: Question re: Lubrication on C-ARF UL Brakes

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Old 11-04-2012, 09:41 PM
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Default RE: Question re: Lubrication on C-ARF UL Brakes

Those don't look like the ones I have. ?

Some questions come to mind:

- have you considered reducing the air pressure in the brake system?

- what about installing a UP -6 so you can control your brake pressure from the transmitter. Even if you like to use down elevator I'm sure there's a mix that would work. I use UP-6's in every jet and love the control as its a true pressure regulating valve. Restrictions and flow controls do not adjust pressure, they just delay it coming on.

-those look like Intairco brakes. I have lubed mine - right or wrong - but it works for me.

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Old 11-04-2012, 09:45 PM
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Default RE: Question re: Lubrication on C-ARF UL Brakes

Paul,

I am at 80 PSI usually. Yes you may be right, they may be Intairco. And again, UP-6, smoothstop, etc... it doesnt matter, my whole point is when I slam on the brakes, I dont want them to lock, I want good braking power but no lock up. The million dollar question I ask is WHAT do you lube your Intaircos with?

Thanks,
Shaz
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Old 11-04-2012, 09:56 PM
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Default RE: Question re: Lubrication on C-ARF UL Brakes

I use Superlube synthetic grease by Synco. Comes in a small squeeze tube.

The whole point of a UP 6 is that you can adjust the maximum pressure so that the brakes grab hard but do not lock up.

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Old 11-05-2012, 02:52 AM
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Default RE: Question re: Lubrication on C-ARF UL Brakes

Shaz............ Todd says do not lube! You will have to use a UP6 valve or run a big tank and low air psi. George
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Old 11-05-2012, 03:05 AM
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Default RE: Question re: Lubrication on C-ARF UL Brakes

I use Interco wheels and brakes on my Flash and lubricate once a year with vaseline. I use the standard Behotec gear and brake valve with 80 psi, over 150 flights no problems nice progressive brakes with no tyre flats.

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Old 11-05-2012, 05:24 AM
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Default RE: Question re: Lubrication on C-ARF UL Brakes

Shaz I tried lube and on our short runway and alt., I did not have enough brake with my flash.
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Old 11-05-2012, 05:33 AM
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Default RE: Question re: Lubrication on C-ARF UL Brakes

1. those are Intairco
2.depending on jet weight &operating valve, I have used a very thin application of Parker O-lube

Isay no lube on lightning Intairco's. It's too heavy for those small brakes&lube makes it takeforever to stop on landing.

The best solution is to justlimitmax travelon the valve to prevent the brakes from locking up.
Iprefer the BVM smooth stop because it seems to havefiner pressureadjustment vs. the UP6.
Settravelby first hand turning the wheels until you think they are about right. Next put the jet on the ground and push it around rolling and applying brakes to fine tune if necessary (or taxi check it)

On small jets like theflash, I use Behotec's retract/brake combo valve wherebrakesare just on/off. I justapply a thin layer oflube to the Intairco'sand it works great. No brake air line restrictor needed.
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Old 11-05-2012, 06:12 AM
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Default RE: Question re: Lubrication on C-ARF UL Brakes

I have had great luck using the Jet Tronics low loss brake valve on my Flash and several other planes. It is really easy to controll the braking pressure. The valve lets you set your max braking pressure and then use proportional braking from almost nothing up to the full pressure you have selected. Works great for dialing in a little bit of pressure for short field landings and to help control hoping on planes that are prone to bounce.
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Old 11-05-2012, 06:49 AM
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Default RE: Question re: Lubrication on C-ARF UL Brakes

1. put in an airline restrictor
2. switch out your wheels and brakes.

Sorry, couldn't resist.

Email sent.
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Old 11-05-2012, 07:55 AM
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Default RE: Question re: Lubrication on C-ARF UL Brakes

3 Simple steps to correct the problem-

#1 DONT LUBE Intairco brakes!
#2 Get a valve that offers you proportional control (a jettronic brake valve in on-off mode offers you exactly that!)
#3 Set maximum brake application in the radio (or the valve as offered in the Jettronic Low Loss) that does not allow the wheels to lock

Problem solved!


FWIW Lubing Intairco wheels will provide inconsistent and usually inadequate brake application. The Intairco brake system when left "dry" provides very effective and predictable brake application; when lubed braking becomes erratic and poor.
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Old 11-05-2012, 03:33 PM
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Default RE: Question re: Lubrication on C-ARF UL Brakes


Quote:
ORIGINAL: sskianpour

Hi All, see photo here.

I bought an UL from a great guy. He converted gear to Pro-Links from Todd, but I ''think'' that he kept the original COMP-ARF wheels and brakes (they look similar to the COMP-ARF Tutor's baking system that I used to own).

Well, these brakes work great. TOO well in fact, the wheels lock up and flat spot. I usually put a drop or two of Parker Super O-Lube on my BVM wheels and brakes and it helps the brakes not lock up. However I have read somewhere that COMP-ARF specifically says DO NOT use any lubrication. In fact, when I used just a couple of drops on my Tutor wheels and brakes, it practically ruined them as braking power went down to near nothing and no matter how many times I wiped the brakes and inside rim, they were never that strong again.

So here are the questions:

1. ARE THESE the COMP-ARF wheels and brakes?
2. Without saying ''switch out your wheel and brake system'' or ''use an air-line restrictor'', can you please advise as to WHAT KIND of lubricant I should use to get a little less braking and locking up?

I just want a simple suggestion as to what people use that helps the wheels turn a bit more while braking without ruining my braking system totally with the wrong lube and without having to switch out my current setup.

Thanks in advance!

Shaz
They look like the wheels and brakes on my Ultra Flash that came with the kit and I put a small amount of lube on the rubber, like I do with BVM brakes, but first, use a proportional brake valve and allow for braking without locking the wheels.
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