Today's Message Index:
----------------------
1. 04:46 AM - Re: turnbuckles (Semih Oksay)
2. 05:52 AM - Re: welding 4130 hinges (Bill Church)
3. 06:05 AM - Re: motorcycle master cylinder (AircamperN11MS)
4. 11:36 AM - Re: motorcycle master cylinder (tkreiner)
5. 11:42 AM - Re: Re: motorcycle master cylinder (Jim Boyer)
6. 12:37 PM - Re: motorcycle master cylinder (AircamperN11MS)
7. 08:12 PM - Re: Re: Starting my build, but need to know which fuselage to build! (Ray Krause)
Message 1
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Your turnbuckle may be old German. 32 tpi is 0.8 mm pitch, which is the
thread pitch for metric 5 screw. I also have a couple of those turnbuckles
from an old Fokker biplane. I also have one larger, metric 6 with 1.0 mm
pitch. They don't mix with AN hardware.
Hope this answers your question.
Semih=8B
On Thu, Apr 7, 2016 at 11:23 PM, Jack <jack@textors.com> wrote:
> Ralph I did the same thing. I've heard some of the older sets threads
> varied. It was important to keep them together as matched sets...
>
> Sent from my iPad
> Jack Textor
>
> On Apr 7, 2016, at 2:53 PM, Ralph <ralphhsd@itctel.com> wrote:
>
> Early on in my Piet build I bought a large number of used turnbuckles at
> Oshkosh. A couple years ago I took one of the end forks with me to Oshko
sh
> to be sure and get the correct size pins for the fork end. Now that I am
> assembling the tail pieces I find I have misplaced the fork end to one of
> the turnbuckles. I located a supple of used turnbuckles locally but can
=99t
> find one of the same thread pitch. I found one of the same diameter but
> only about 4 threads will fit into the barrel. Under a microscope I coun
t
> 30 threads per inch on the type fork I need to replace. The used one I
> found has 32 threads per inch as does the forks available from Aircraft
> Spruce. Is it possible the used turnbuckles I got years ago at Oshkosh a
re
> a military spec which is different than the thread spec currently used on
> civilian aircraft? I will be able to replace the entire turnbuckle unit
> but I am curious about the 2 threads per inch difference in the forks.
> Anybody have any explanation?
>
> Ralph in SD
>
>
--
Semih Oksay
Message 2
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Subject: | Re: welding 4130 hinges |
Dan,
Technically speaking, post weld normalizing is not necessary when welding 4130
for thicknesses of 1/8" or less. However, the need to follow appropriate welding
procedures, using the correct filler rods (in the appropriate sizes) etc is
very important. And, as it has already been mentioned, slow cooling in very
still air, at room temperature is critical.
Bill C.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=454723#454723
Message 3
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Subject: | Re: motorcycle master cylinder |
Jon,
Mt motorcycles have the same master cylinder. I have often wondered the same thing.
I don't have brakes on my plane, that said you would really need to be
careful about which brake calipers you use. The master cyl does not have much
volume transfer when you apply the brakes. You could easily end up with a caliper
that would require more fluid to operate that the master cylinder could
supply with a single stroke. Perhaps you could use the caliper from the motorcycle
as well. Then I wouldn't see any potential problems. In fact I suspect
it would work very well.
Just something to consider,
--------
Scott Liefeld
Flying N11MS since March 1972
Steel Tube
C-85-12
Wire Wheels
Brodhead in 1996
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=454724#454724
Message 4
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Subject: | Re: motorcycle master cylinder |
Scott,
If you'll examine a fully bled disc brake setup, I think you'll find that the clearance
between pad and disc is around .005 in. So, in order to operate properly,
the brake master only needs a few thousandths of movement itself.
In fact, if the ratio of piston areas is 8 to one, and we assume .005 piston travel
at the caliper, the master cylinder piston only needs to move .040 in.
The amount of fluid being moved is very small; in a kart or cycle brake setup such
as the one shown the volume of fluid beng move is probable around .5 cc or
less.
Hope this helps...
--------
Tom Kreiner
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=454739#454739
Message 5
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Subject: | Re: motorcycle master cylinder |
HI Scott,
Dick Navratil's brown Piet had Harley Davidson motorcycle brakes; mater cylinder
and calipers.
Cheers,
Jim B.
Message 6
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Subject: | Re: motorcycle master cylinder |
You guys a spot on. I only mention the whole ratio thing so that all volumes are
considered. That master cyl is very small, I know because I have a few. I
just didn't want someone thinking that they might be able to operate a dual piston
caliper with it. You need to do the math first.
If done properly, I don't see any reason it wouldn't work.
Yes I understand how it all works. I have well over 40 years either working on
or designing tractors and fire equipment.
Thanks for the input. I was just trying to answer his direct questions.
Cheers all,
Jim,
I have never seen Dick's plane in person and did not know what brakes he had used.
--------
Scott Liefeld
Flying N11MS since March 1972
Steel Tube
C-85-12
Wire Wheels
Brodhead in 1996
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=454741#454741
Message 7
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Subject: | Re: Starting my build, but need to know which fuselage |
to build!
John,
I would like to get the most recent BPA newsletter. I guess my subscription ran
out. Please send the info. I will send a check right away. No need to mail it
to me, email is gone.
Thanks,
Ray Krause
843 Jay Street
Colusa, CA 95932
Sent from my iPad
> On Feb 29, 2016, at 5:12 PM, John Hofmann <jhofmann@reesgroupinc.com> wrote:
>
> The promised w&b articles.
>
> Best,
> -john-
> <Pietenpol Weight and Balance.pdf>
>
>> On Feb 26, 2016, at 7:52 AM, John Hofmann <jhofmann@reesgroupinc.com> wrote:
>>
>>
>> I will post it to the list later today when I get to my hotel.
>>
>> Sent from my iPhone
>>
>>> On Feb 26, 2016, at 5:17 AM, johnnysdrop <johnnysdrop@googlemail.com> wrote:
>>>
>>>
>>> Is the Brodhead / WW W&B calculator available online?
>>> English Johnny
>>> STILL building wings
>>>
>>> --------
>>> The only way is UP
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=453205#453205
>
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