Today's Message Index:
----------------------
1. 04:42 AM - Re: Re: Pitot tube mast (Gordon Anderson)
2. 07:49 AM - Leaking brake cylinder fitting (Les Kearney)
3. 10:37 AM - Re: Re: Pitot tube mast (Nikolaos Napoli)
4. 11:11 AM - Re: Re: Pitot tube mast (Tim Olson)
5. 12:53 PM - Re: Re: Pitot tube mast (Rob Kochman)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Pitot tube mast |
Hi Kelly,
I just finished installing the Gretz mount for the Dynon pitot.
The Gretz kit appears to be slightly more complicated, having a
reinforcing backplate riveted to the skin and spar, plus a spacer plate
and most of the nutplates and bolts required (except those to join the
pitot and mast). The arrangement is obviously heavier (steel mast,
more parts) but perhaps more robust (no cracking history). The mast is
removable for storage and painting if wanted (eg. with the chrome mast)
and is not in place when you rivet the bottom skins on. The mast is
bolted afterwards to the reinforcement plate inside the wing.
In consultation with my tech advisor I also added an additional length
of J-stiffener along the back edge of the reinforcing plate to reduce
skin flexing under load. Altogether it became a little complex (perhaps
over engineered) but it shouldn't fall off=85. :-)
Cheers,
Gordon
41015 Switzerland
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Leaking brake cylinder fitting |
Hi
I installed by brakes per Van's plan eons ago. My only problem was a weeping
leak at the bottom on one master cylinder that I couldn't fix. What I was
experiencing was a zero pressure leak, just a weeping leak that would form a
drop of fluid after a few days. Then I would get a drip on the floor pan.
To solve, I tried changing the fittings and then, at the suggestion of
Matco, I used Loctite 567 thread sealant. Still no luck. My fear was I had
over tightened the compression fitting and damaged the threads.
Anyway, I pulled the cylinder and installed a new one. I sent the original
back to Matco for inspection.
I just had a very interesting call from Matco where they explained what
happened. First, they did a zero pressure test and duplicated my problem.
Them they cleaned the treads and tried again. They still had a problem.
Finally they disassembled the cylinder and really cleaned it with acetone.
WARNING: don't use solvent if the rubber fittings are in place as they will
be damaged. They found hardened sealant at the bottom of the fitting hole
that was preventing the Loctite 567 from doing its job. They said there is a
leak path at the bottom of compression fittings that the Loctite seals. The
old hardened sealant was preventing this from happening. When completely
cleaned and reinstalled using Loctite 567, the cylinder functioned
perfectly.
Page 38-3 of the Van's plans suggest using fuel lube or a similar thread
sealant to seal the fittings. Matco's recommendation is to use Loctite 567
which is a very different product. This also matches the recommendation of
my local A&Ps.
The only really good thing that came out of this is I can now bleed my
brakes in under 5 minutes - practise does make perfect.
As a side note, they mentioned that there was dust / debris on the top of
the cylinder that accumulated during my build. They cautioned that this
should be cleaned off as it could cause a problem with the seal where the
shaft exits the cylinder. Although I have been cleaning fairly often, I
never even thought about the top of the cylinders. It is something to keep
in mind.
Cheers
Les #40643
I can almost see the light at the end of the tunnel
PS: Matco was very, very helpful throughout all of this.
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Pitot tube mast |
I installed the gretz. Its pretty straightforward and appears sturdy. Havent
flown it yet. Dont know how it compares to others.
Niko
On Feb 9, 2012, at 9:17 PM, Kelly McMullen <apilot2@gmail.com> wrote:
>
> Thanks Bill. I was beginning to wonder if my question made it to the
> list. I know some used the Gretz....arguments for it?
>
> On Thu, Feb 9, 2012 at 5:53 PM, bill.peyton <peyton.b@sbcglobal.net> wrote:
>>
>> I installed the safeair. The quality looks fine and the install was not difficult.
>>
>> --------
>> Bill Peyton
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=365997#365997
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Pitot tube mast |
While the only one I know is the Gretz, I've been happy with it.
I bought it only for it's thermostatic control. I leave it
on for long periods of time and I see by the lights that it
only cycles as-needed. So from an energy (battery) conservation
perspective, I like it. That said, I'd probably not be too
unhappy with any good heated pitot. The gretz mount I liked
either way.
Tim
On 2/10/2012 12:36 PM, Nikolaos Napoli wrote:
> --> RV10-List message posted by: Nikolaos Napoli<napolin@me.com>
>
> I installed the gretz. Its pretty straightforward and appears sturdy. Havent
flown it yet. Dont know how it compares to others.
>
> Niko
>
>
> On Feb 9, 2012, at 9:17 PM, Kelly McMullen<apilot2@gmail.com> wrote:
>
>> --> RV10-List message posted by: Kelly McMullen<apilot2@gmail.com>
>>
>> Thanks Bill. I was beginning to wonder if my question made it to the
>> list. I know some used the Gretz....arguments for it?
>>
>> On Thu, Feb 9, 2012 at 5:53 PM, bill.peyton<peyton.b@sbcglobal.net> wrote:
>>> --> RV10-List message posted by: "bill.peyton"<peyton.b@sbcglobal.net>
>>>
>>> I installed the safeair. The quality looks fine and the install was not difficult.
>>>
>>> --------
>>> Bill Peyton
>>>
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Pitot tube mast |
I used the Dynon pitot in the Gretz mount. No complaints so far. As Tim
notes, the thermostatic control really seems to save power.
On Fri, Feb 10, 2012 at 11:09 AM, Tim Olson <Tim@myrv10.com> wrote:
>
> While the only one I know is the Gretz, I've been happy with it.
> I bought it only for it's thermostatic control. I leave it
> on for long periods of time and I see by the lights that it
> only cycles as-needed. So from an energy (battery) conservation
> perspective, I like it. That said, I'd probably not be too
> unhappy with any good heated pitot. The gretz mount I liked
> either way.
>
> Tim
>
>
> On 2/10/2012 12:36 PM, Nikolaos Napoli wrote:
>
>> --> RV10-List message posted by: Nikolaos Napoli<napolin@me.com>
>>
>> I installed the gretz. Its pretty straightforward and appears sturdy.
>> Havent flown it yet. Dont know how it compares to others.
>>
>> Niko
>>
>>
>> On Feb 9, 2012, at 9:17 PM, Kelly McMullen<apilot2@gmail.com> wrote:
>>
>> --> RV10-List message posted by: Kelly McMullen<apilot2@gmail.com>
>>>
>>> Thanks Bill. I was beginning to wonder if my question made it to the
>>> list. I know some used the Gretz....arguments for it?
>>>
>>> On Thu, Feb 9, 2012 at 5:53 PM, bill.peyton<peyton.b@**sbcglobal.net<peyton.b@sbcglobal.net>>
>>> wrote:
>>>
>>>> --> RV10-List message posted by: "bill.peyton"<peyton.b@**
>>>> sbcglobal.net <peyton.b@sbcglobal.net>>
>>>>
>>>> I installed the safeair. The quality looks fine and the install was
>>>> not difficult.
>>>>
>>>> --------
>>>> Bill Peyton
>>>>
>>>>
>
>
--
Rob Kochman
RV-10 Flying since March 2011
Woodinville, WA
http://kochman.net/N819K
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|