Today's Message Index:
----------------------
1. 12:53 AM - Re: Damn baffles (Gary L Vogt)
2. 06:09 AM - Re: Damn baffles (flyv35b)
3. 07:25 AM - Re: Damn baffles (Airport Bum)
4. 11:25 AM - Re: Damn baffles (Gary Vogt)
5. 11:25 AM - Re: Damn baffles (Gary Vogt)
Message 1
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| Subject: | Re: Damn baffles |
I could be a smart ass and say, "Damn. That's a great idea. Who would have thought?"
But I won't. Trust me paper won't get you to the .010 to .020 tolerance I build
my baffles to. A coat hangar can be used to size brake line too. It'll get
you close. But it won't fit worth a damn.
When you install my baffles (the ones I've finalized), there is no trim to fit.
On the baffles that failed MY criteria, it was because the holes in the #4 cylinder
baffle with the holes for the nut plates, are off .050 inches. The holes
in the left rear baffle for the oil cooler puts the oil cooler .025 inches
too far outboard. Doesn't fit well without pushing and shoving. 15 pieces were
scrapped.
Now, I know I could have left all that bullshit trim-to-fit, that's the quality
other STC holders build to (just ask Scott Jerigan). Why not do it right?
Regrettably, the Rev A version of the left rear inner baffle wasn't approved by
the FAA. Long story. So, it will need some trim to fit. The rest are minor changes.
I can do those.
Gary
Sent from my iPad
On Apr 14, 2011, at 9:26 PM, Airport Bum <aa5_driver@yahoo.com> wrote:
>
> Your not doing it right! Samples are done in paper or vinyl before hard product
is made. We do this stuff all the time.
>
> Kevin
>
> Gary Vogt <teamgrumman@yahoo.com> wrote:
>
>> Can you believe almost $1200 for a set of baffles?
>>
>> Not only that, but, I still didn't get the hole spacing right on the #4/oil
>> cooler match up.
>>
>> Damn. Lots of scrap aluminum.
>
>
>
>
>
Message 2
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| Subject: | Re: Damn baffles |
On the baffles that failed MY criteria, it was because the holes in
the #4 cylinder baffle with the holes for the nut plates, are off .050
inches. The holes in the left rear baffle for the oil cooler puts the
oil cooler .025 inches too far outboard. Doesn't fit well without
pushing and shoving. 15 pieces were scrapped.
>
Why would you have to scrap 15 pieces? Couldn't you just make a new
rear baffle-the one the cooler is attached to?
Message 3
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| Subject: | Re: Damn baffles |
Gary,
I'm just giving you a hard time, you know one smart ass helping another.
We do often make multiple prototypes to get the close tolerances your looking for.
It is a pain but it is worth it. Of course it helps to have the equipment
in house.
I'm not sure if you are doing the actual design work or if you are having it done.
If your having it done, you might considered finding a program that works
natively in the dxf format. That will give you a lot more control over the process.
Corel draw and adobe illustrator are common programs that can work in dxf, there
are many others.
Once you have the file, your cutter should be able to convert the dxf to whatever
they use if they cannot use dxf directly.
Don't forget that you can often easily exceed the mfgs production tolerances making
your part require fitting to each individual engine, panel, or whatever your
making the part for.
Kevin
-----Original Message-----
From: Gary L Vogt <teamgrumman@yahoo.com>
Sent: Fri, 15 Apr 2011 3:00 AM
Subject: Re: TeamGrumman-List: Damn baffles
I could be a smart ass and say, "Damn. That's a great idea. Who would have thought?"
But I won't. Trust me paper won't get you to the .010 to .020 tolerance I build
my baffles to. A coat hangar can be used to size brake line too. It'll get
you close. But it won't fit worth a damn.
When you install my baffles (the ones I've finalized), there is no trim to fit.
On the baffles that failed MY criteria, it was because the holes in the #4 cylinder
baffle with the holes for the nut plates, are off .050 inches. The holes
in the left rear baffle for the oil cooler puts the oil cooler .025 inches
too far outboard. Doesn't fit well without pushing and shoving. 15 pieces were
scrapped.
Now, I know I could have left all that bullshit trim-to-fit, that's the quality
other STC holders build to (just ask Scott Jerigan). Why not do it right?
Regrettably, the Rev A version of the left rear inner baffle wasn't approved by
the FAA. Long story. So, it will need some trim to fit. The rest are minor changes.
I can do those.
Gary
Sent from my iPad
On Apr 14, 2011, at 9:26 PM, Airport Bum <aa5_driver@yahoo.com> wrote:
>
> Your not doing it right! Samples are done in paper or vinyl before hard product
is made. We do this stuff all the time.
>
> Kevin
>
> Gary Vogt <teamgrumman@yahoo.com> wrote:
>
>> Can you believe almost $1200 for a set of baffles?
>>
>> Not only that, but, I still didn't get the hole spacing right on the #4/oil
>> cooler match up.
>>
>> Damn. Lots of scrap aluminum.
>
>
>
>
>
Message 4
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| Subject: | Re: Damn baffles |
Well, good point. Let me elaborate.
10 of the baffles are the oil cooler baffles. 5 with a large cutout. 5 with a
small cutout. I should have only ordered the small ones. Too late now. The
oil cooler hole itself is off too far. It needs to move in some. Shortening
the entire part by .050 will do it, but then the holes to mount the oil cooler
are off too much. The #4 cylinder baffle holes are too high. The oil cooler
baffle won't fit without crowding the holes. These fit a lot tighter than the
stock baffles. So, I'm going to change the baffles. Since I need a large oil
cooler hole for my plane, everyone gets the large oil cooler hole.
Gary
________________________________
From: flyv35b <flyv35b@minetfiber.com>
Sent: Fri, April 15, 2011 6:07:23 AM
Subject: Re: TeamGrumman-List: Damn baffles
On the baffles that failed MY criteria, it was because the holes in the #4
cylinder baffle with the holes for the nut plates, are off .050 inches. The
holes in the left rear baffle for the oil cooler puts the oil cooler .025 inches
too far outboard. Doesn't fit well without pushing and shoving. 15 pieces were
scrapped.
>
Why would you have to scrap 15 pieces? Couldn't you just make a new rear
baffle-the one the cooler is attached to?
Message 5
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| Subject: | Re: Damn baffles |
I'm drawing them myself in AutoCad.
________________________________
From: Airport Bum <aa5_driver@yahoo.com>
Sent: Fri, April 15, 2011 7:22:32 AM
Subject: Re: TeamGrumman-List: Damn baffles
Gary,
I'm just giving you a hard time, you know one smart ass helping another.
We do often make multiple prototypes to get the close tolerances your looking
for. It is a pain but it is worth it. Of course it helps to have the equipment
in house.
I'm not sure if you are doing the actual design work or if you are having it
done. If your having it done, you might considered finding a program that works
natively in the dxf format. That will give you a lot more control over the
process.
Corel draw and adobe illustrator are common programs that can work in dxf, there
are many others.
Once you have the file, your cutter should be able to convert the dxf to
whatever they use if they cannot use dxf directly.
Don't forget that you can often easily exceed the mfgs production tolerances
making your part require fitting to each individual engine, panel, or whatever
your making the part for.
Kevin
-----Original Message-----
From: Gary L Vogt <teamgrumman@yahoo.com>
Sent: Fri, 15 Apr 2011 3:00 AM
Subject: Re: TeamGrumman-List: Damn baffles
I could be a smart ass and say, "Damn. That's a great idea. Who would have
thought?"
But I won't. Trust me paper won't get you to the .010 to .020 tolerance I build
my baffles to. A coat hangar can be used to size brake line too. It'll get you
close. But it won't fit worth a damn.
When you install my baffles (the ones I've finalized), there is no trim to fit.
On the baffles that failed MY criteria, it was because the holes in the #4
cylinder baffle with the holes for the nut plates, are off .050 inches. The
holes in the left rear baffle for the oil cooler puts the oil cooler .025 inches
too far outboard. Doesn't fit well without pushing and shoving. 15 pieces were
scrapped.
Now, I know I could have left all that bullshit trim-to-fit, that's the quality
other STC holders build to (just ask Scott Jerigan). Why not do it right?
Regrettably, the Rev A version of the left rear inner baffle wasn't approved by
the FAA. Long story. So, it will need some trim to fit. The rest are minor
changes. I can do those.
Gary
Sent from my iPad
On Apr 14, 2011, at 9:26 PM, Airport Bum <aa5_driver@yahoo.com> wrote:
>
> Your not doing it right! Samples are done in paper or vinyl before hard
>product is made. We do this stuff all the time.
>
> Kevin
>
> Gary Vogt <teamgrumman@yahoo.com> wrote:
>
>> Can you believe almost $1200 for a set of baffles?
>>
>> Not only that, but, I still didn't get the hole spacing right on the #4/oil
>> cooler match up.
>>
>> Damn. Lots of scrap aluminum.
>
>
>
>
>
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