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teamgrumman(at)yahoo.com
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 Posted: Sat Jun 04, 2011 10:01 am Post subject: Engine movement |
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Just for shits and grins, next time you check your oil (with the cowling open), look at the #1 cylinder baffle. Look at where it chafes on upper cowling. Some are worse than other.
Most folks believe the chafing comes during engine start up and shutdown. True, the engine moves around a lot then. But really, the motion is less than 1/2 inch at the forward baffles (up and down).
The factory made that baffle 1/4 inch too high toward the front.
Now, take that same engine baffle combination and, in flight, just make a turn to the right. The baffle is actually crushed into the upper cowling. The engine moves well over 1/2 inch. Most AG5Bs with the big doubler on the upper cowling have that doubler cut all the way through.
Here's another well kept secret. Look at the #4 cylinder baffle. Especially on a Tiger. Notice the mis-match with the baffle supporting the oil cooler. Notice the mis-match at the #4 to #2 cylinder baffle. That's because the #4 baffle is the same basic baffle as the one used on the Traveler. The Left rear baffle (oil cooler baffle) on a Tiger is also about 1/4 inch too high (at the end where it attaches to the #4 cylinder baffle) to make a perfect uniform gap between the baffle and the upper cowling. They can get away with it because the engine doesn't rotate in the direction which would make contact with the upper cowling.
I've made measurements all over the engine both static and in-flight.
[quote][b]
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pitts_pilot(at)bellsouth.
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| Posted: Sat Jun 04, 2011 10:46 am Post subject: Engine movement |
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On 6/4/2011 1:59 PM, Gary Vogt wrote: Ron will get you for that one! 
Well, maybe not .... this isn't the GG!
| Quote: | and grins, next time you check your oil (with the cowling open), look at the #1 cylinder baffle. Look at where it chafes on upper cowling. Some are worse than other.
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Snip!
| Quote: | I've made measurements all over the engine both static and in-flight.
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How did you do the measurements? Especially the in-flight!
Linn
[quote]
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andy747(at)charter.net
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| Posted: Sat Jun 04, 2011 1:29 pm Post subject: Engine movement |
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Linn,
Nice meeting you at SSI....got to match lots of names with faces. I've got 2 sets of plugs, new in box, to get rid of. 4 Champion REM37BY and 4 REM38E per set. I bought what was left from a closed shop to get a good price for myself. Know any body that might be interested (at)$150 per set plus shipping ?
I will make the offer on GG next week. Week end seems to be a slow
Andy Thomas
[quote] ---
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teamgrumman(at)yahoo.com
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| Posted: Sat Jun 04, 2011 5:29 pm Post subject: Engine movement |
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Have you seen the mechanical micrometer with the point that sticks out when you extend it? Or, maybe a slide rule (you're old so you'll know what that is.) If you extend it, close the cowling on it, it compresses to the available height. Then, check before and after ground run or flight. It gives a good approximation. Certainly not to two decimal accuracy.
From: Linn Walters <pitts_pilot(at)bellsouth.net>
To: teamgrumman-list(at)matronics.com
Sent: Sat, June 4, 2011 11:43:38 AM
Subject: Re: Engine movement
On 6/4/2011 1:59 PM, Gary Vogt wrote: Ron will get you for that one!
Well, maybe not .... this isn't the GG!
| Quote: | and grins, next time you check your oil (with the cowling open), look at the #1 cylinder baffle. Look at where it chafes on upper cowling. Some are worse than other.
|
Snip!
| Quote: | I've made measurements all over the engine both static and in-flight.
|
How did you do the measurements? Especially the in-flight!
Linn
[quote][b]
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pitts_pilot(at)bellsouth.
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| Posted: Sat Jun 04, 2011 5:38 pm Post subject: Engine movement |
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On 6/4/2011 9:27 PM, Gary Vogt wrote: | Quote: | Have you seen the mechanical micrometer with the point that sticks out when you extend it? Or, maybe a slide rule (you're old so you'll know what that is.)
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Yes to both! 
| Quote: | If you extend it, close the cowling on it, it compresses to the available height. Then, check before and after ground run or flight. It gives a good approximation. Certainly not to two decimal accuracy.
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Good idea. thanks.
Linn
[quote]
From: Linn Walters <pitts_pilot(at)bellsouth.net> (pitts_pilot(at)bellsouth.net)
To: teamgrumman-list(at)matronics.com (teamgrumman-list(at)matronics.com)
Sent: Sat, June 4, 2011 11:43:38 AM
Subject: Re: Engine movement
On 6/4/2011 1:59 PM, Gary Vogt wrote: Ron will get you for that one!
Well, maybe not .... this isn't the GG!
| Quote: | and grins, next time you check your oil (with the cowling open), look at the #1 cylinder baffle. Look at where it chafes on upper cowling. Some are worse than other.
|
Snip!
| Quote: | I've made measurements all over the engine both static and in-flight.
|
How did you do the measurements? Especially the in-flight!
Linn
[b]
| | - The Matronics TeamGrumman-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?TeamGrumman-List |
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