REFLECTOR: Main Tire Tubes

Thu Apr 11 18:22:14 CDT 2013

I just replaced my brake liners last week after 5-1/2 years of flying.  I
remember teaching myself how to safety wire on these same bolts.  Here is a
picture I took the first time I did it.  It took 2 or 3 tries to get it to
look this nice.  Well worth the time.

Darrell

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Laurence Coen
Sent: Thursday, April 11, 2013 12:25 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Main Tire Tubes

OK, that makes sense.  I forgot about them but safety wire would prevent
locking up the wheel like you experienced. I have never heard of this
happening to anyone else.  You have to be wondering, "Why me".  If that had
happened at touch down it would have been real serious.  I am going to check
my bolts before next flight.

Larry Coen
N136LC

P.S.: Your copilot's name isn't Murphy is it?

--------------------------------------------------
From: "Brian Michalk" <michalk at awpi.com>
Sent: Thursday, April 11, 2013 12:02 AM
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Subject: Re: REFLECTOR: Main Tire Tubes

> I'm talking about part #1 from here:
> http://static.veracart.com/matco/item_pdfs/2412/document1.pdf
> These bolts hold the caliper together.
>
> I saw that there were four different types of Matco tubes, which I 
> think have to do with the stem location.  I was wondering which one I
need.
>
> Anyway, I'm on the road this week, and it's too late to get a 
> replacement bolt in before this weekend, so I guess flight testing is 
> out for me unless I can find a replacement bolt from somewhere local.
>
> On 4/10/2013 3:11 PM, Laurence Coen wrote:
>> Brian,
>>
>> Fixed gear=6.00-6, retract=15x6.00-6 tire size.
>>
>> I assume that you are talking about the bolts that attach the 
>> axel/brake caliper to the gear leg.  Mine are standard AN hardware 
>> with friction nuts. The brake disk is attached to the wheel with cap 
>> screws (socket head).  In my install the bolt heads are on the inside 
>> of the gear leg and the nuts are against the caliper mount.  They can 
>> be turned around with the nuts against the gear leg but you still 
>> have a bolt retained with a friction nut and that should retain torque.
>>
>> Larry Coen
>> N136LC
>>
>> --------------------------------------------------
>> From: "Brian Michalk" <michalk at awpi.com>
>> Sent: Tuesday, April 09, 2013 9:47 PM
>> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
>> Subject: REFLECTOR: Main Tire Tubes
>>
>>> I need to order some bolts from Matco, and need to fill up at least $10.

>>> What is the tube that I need to order for the W600XT?
>>>
>>> Speaking of replacing bolts.
>>>
>>> Yes, there is a reason for those drilled socket head screws.  I had 
>>> one of the four screws works its way out into the aluminum wheel.  I 
>>> was on a test flight, the longest one yet at 15 minutes due to high oil
temps.
>>> When I came in for a landing just as I was about to pull off the 
>>> runway, the right wheel seized. I wasn't going very fast, and there 
>>> doesn't appear to be any major damage.
>>>
>>> I had safety wired the disc to the wheel, but not the internal 
>>> socket screws.  When I re-assemble, I'm going to use some Lock-Tite 
>>> and safety wire.  That should keep the screws torqued down. 
>>> Shouldn't there be a lock washer there anyway to maintain torque? 
>>> Safety wire doesn't maintain torque, and the way these screws are 
>>> used, they are really put under a lot of bending forces.
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