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Author Topic: Dust cover and cover plate (Richard Spink, Mili Atoll)  (Read 167435 times)

Andrew M McKenna

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Re: Dust cover and cover plate (Richard Spink, Mili Atoll)
« Reply #45 on: December 06, 2014, 05:42:25 PM »

Here is another shot from Senegal

http://e-archives.lib.purdue.edu/cdm/singleitem/collection/earhart/id/294/rec/27

cropped bit attached

Is that a dust cover or not?  I don't know what one looks like, so... doesn't look like one to me, but

amck
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Jerry Germann

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Re: Dust cover and cover plate (Richard Spink, Mili Atoll)
« Reply #46 on: December 06, 2014, 10:19:57 PM »

RIC GILLESPIE
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X    Re: Dust cover and cover plate
« Reply #4 on: November 24, 2014, 10:54:51 AM »Quote
--------------------------------------------------------------------------------

What I haven't seen are photos of NR16020 pointing out the pieces they think they have. 
The Electra did not have an auxiliary power unit but I think it did have a place to plug in an external electrical power source for what we used to call a "cart start."
Quote

Here is one in use;

https://www.flickr.com/photos/sdasmarchives/7449876616/sizes/h/in/pool-1500493@N20/

« Last Edit: December 06, 2014, 11:10:39 PM by Jerry Germann »
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Jerry Germann

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Re: Dust cover and cover plate (Richard Spink, Mili Atoll)
« Reply #47 on: December 06, 2014, 11:07:54 PM »

Here is another shot from Senegal

http://e-archives.lib.purdue.edu/cdm/singleitem/collection/earhart/id/294/rec/27

cropped bit attached

Is that a dust cover or not?  I don't know what one looks like, so... doesn't look like one to me, but

amck

Andrew,

           This is a pretty good view of the larger inboard brake side of the hub;

<a href="http://s1295.photobucket.com/user/muledeer5/media/brakeassemblytwonotethefourbolts_zps74265162.jpg.html" target="_blank"><img src="http://i1295.photobucket.com/albums/b631/muledeer5/brakeassemblytwonotethefourbolts_zps74265162.jpg" border="0" alt=" photo brakeassemblytwonotethefourbolts_zps74265162.jpg"/></a>

    It looks like a cover from afar, ( inserted in working position , even more so), however; it is part of the hydraulic brake assembly.

Also Marty posted some good pictures ofthe inboard /outboard sides of the hub here;https://plus.google.com/photos/+MartinMoleski/albums/6089396269535847025?authkey=CM-1wLXhk-yJuwE#photos/+MartinMoleski/albums/6089396269535847025?authkey=CM-1wLXhk-yJuwE

This is just speculation on my part , however in this photo  http://e-archives.lib.purdue.edu/cdm/singleitem/collection/earhart/id/329/rec/546 and others it appears as if there is a groove in the center of the edge around the rim,...my ideas are that the lip/tab of the dust cover fits into this groove , to provide a seal all around the outer edge and to secure it in place with  just the use of three small screws, due to wedging action. I am still in search of dust cover photos.....also center hole of dust cover,....would one expect to find an oiled rope , rubber seal, of felt placed there to seal around the axle? Would be great to find a cover photo.

« Last Edit: December 07, 2014, 02:35:05 AM by Jerry Germann »
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Andrew M McKenna

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Re: Dust cover and cover plate (Richard Spink, Mili Atoll)
« Reply #48 on: December 07, 2014, 03:00:04 PM »

Been trying to find a photo of an air wheel with a dust cover on it to compare.

Here is a photo in the Purdue collection that is not AE's Electra, but has a decent shot of the dust cover (I think) in place.

http://e-archives.lib.purdue.edu/cdm/singleitem/collection/earhart/id/742/rec/113

Is that any different than the photo of AE's aircraft in Java found here

http://e-archives.lib.purdue.edu/cdm/singleitem/collection/earhart/id/321/rec/11

Is the dust cover molded over the hub in the way it appears in these photos?

amck
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Martin X. Moleski, SJ

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Re: Dust cover and cover plate (Richard Spink, Mili Atoll)
« Reply #49 on: December 07, 2014, 03:24:03 PM »

Is the dust cover molded over the hub in the way it appears in these photos?

I'm no A&P, and I don't play one in my dreams, and I didn't stay at a Holiday Inn last night, but I think it's possible that what you are calling a "dust cover" is actually the brake drum on the inside of the wheel. 

LTM,

           Marty
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JNev

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Re: Dust cover and cover plate (Richard Spink, Mili Atoll)
« Reply #50 on: December 07, 2014, 03:33:51 PM »

Second that, and no longer a playing A&P and generally stay at Super 8 or the one with the light on.
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Monty Fowler

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Re: Dust cover and cover plate (Richard Spink, Mili Atoll)
« Reply #51 on: December 07, 2014, 05:26:14 PM »

The photo Jerry Germann highlighted, https://www.flickr.com/photos/sdasmarchives/7449876616/sizes/h/in/pool-1500493@N20, pretty conclusively proves (to a reasonable person), that Earhart's aircraft did not have any kind of cover over the external power connector:

1) External power connector receptacle is clearly visible in the photo. No evidence of any kind of cover.
2) Large, rectangular charging bus is plugged into receptacle, appearing to fill it entirely, with no evidence of a cover lifted or swung to the side, etc.
3) A battery is clearly at the other end of the cable that is plugged into the receptacle.
4) No evidence of any kind of cover lying on the ground under the engine or near the battery, if it was of the removable type.

I think this group has found a remnant from one of the myriad of Japanese types that operated in the area. The reddish paint remnants could be from either the national insignia, which were a bright red, or from the reddish primer that some Japanese types were undercoated with.

LTM,
Monty Fowler, TIGHAR No. 2189 ECSP



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Andrew M McKenna

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Re: Dust cover and cover plate (Richard Spink, Mili Atoll)
« Reply #52 on: December 07, 2014, 05:51:37 PM »

Marty

I've seen your photo, and what I think is missing is the dust cover, which I understand to be a thin sheet that was intended to fit over the inboard hub seen in your photo, i.e. the aircraft in your photo doesn't have it in place for whatever reason.

Maybe I'm mistaken, but that is my understanding.  I'm hoping to find some close up photo that shows the dust cover in place.  If it is in your photo, I'm not seeing it, so please help me understand if you think the dust cover is there.

Thanks

Andrew


Is the dust cover molded over the hub in the way it appears in these photos?

I'm no A&P, and I don't play one in my dreams, and I didn't stay at a Holiday Inn last night, but I think it's possible that what you are calling a "dust cover" is actually the brake drum on the inside of the wheel. 
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Andrew M McKenna

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Re: Dust cover and cover plate (Richard Spink, Mili Atoll)
« Reply #53 on: December 07, 2014, 06:01:51 PM »

There has been some discussion on this Forum and others about how the dust covers are listed on the Luke Field inventory taken after the crash in Hawaii as "cover plates for wheels" show that Earhart's Electra had the dust covers installed.  I've spent some time looking at that inventory, found here:  http://tighar.org/Projects/Earhart/Archives/Documents/Luke_Field.html

and have some impressions with regards to these "cover plates".

On the first page of the inventory, an official RECEIPT form is used, while the subsequent pages are "loose sheets" titled by Sheet No. 1, 2, etc.  The RECEIPT has all the large items for the aircraft, fuselage, engines, wings, tail feathers, and of interest is Item #5 - "Two (2) Landing gear forks with wheels & tires"

It struck me odd that the "cover plates for wheels" found on Sheet No. 3 are listed separately from the rest of the landing gear on the fist page RECEIPT.

Look at the items adjacent to the cover plates on the list from Sheet No. 3

spare cans of lubrication
spare brake fluid
Carton of spare propellor bearings
Base Plate for speed and drift meter
Pkg of rubber vent covers
Cover plates for wheels
Snap ring
Control column Wheel
2 pcs of sheet metal Alcoa
Etc

Most of these items seem like spare parts, and I think these cover plates were spares as well.

Why are they listed separately from the landing gear while other components of the landing gear are not singled out, such as the mud fender?  Note also that the gear forks still had their wheels and tires on them, as found on the RECEIPT.  How to you get the dust covers off the wheel to be inventoried separately when the wheel and tires are still on the forks?

If the cover plates for wheels are the same as the dust covers, all this indicates is that there were some spares aboard during the first attempt.  That doesn't mean they weren't installed or carried as spares on the second attempt, just that the Luke Field inventory may not support that conclusion.  The photos will tell the tale there.

If the cover plates for wheels are not the same as dust covers, what are they?

Andrew
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Andrew M McKenna

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Re: Dust cover and cover plate (Richard Spink, Mili Atoll)
« Reply #54 on: December 07, 2014, 07:39:24 PM »

Can we determine when the photo Jerry Germann linked us to was taken?

Has the DF loop, dorsal V antennae, looks like California, Hangar says Western Air Express.  When?


https://www.flickr.com/photos/sdasmarchives/7449876616/sizes/h/in/pool-1500493@N20/

Andrew
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Ric Gillespie

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Re: Dust cover and cover plate (Richard Spink, Mili Atoll)
« Reply #55 on: December 07, 2014, 07:45:38 PM »

Can we determine when the photo Jerry Germann linked us to was taken?

The loop was installed on or about March 6.  They left for Hawaii March 17.
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Martin X. Moleski, SJ

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Re: Dust cover and cover plate (Richard Spink, Mili Atoll)
« Reply #56 on: December 07, 2014, 08:39:56 PM »

I've seen your photo, and what I think is missing is the dust cover, which I understand to be a thin sheet that was intended to fit over the inboard hub seen in your photo, i.e. the aircraft in your photo doesn't have it in place for whatever reason.

Maybe I'm mistaken, but that is my understanding.  I'm hoping to find some close up photo that shows the dust cover in place.  If it is in your photo, I'm not seeing it, so please help me understand if you think the dust cover is there.

I'm not seeing a dust cover in any photographs of NR16020.  I don't see a rationale for a dust cover on the inboard of the wheels, which are pretty well covered by what seems to me to be the housing for the brake assembly. 

I presume that the "dust covers" were essentially like hub caps.  I see from a Google search that the function of the dust covers was to keep dirt out of the wheel bearings, and I can see how that might be helpful, maybe. But, to my unprofessional eye, all the photos I've seen of the outside of the wheels on AE's Electra seem to me to be uncovered.



LTM,

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Andrew M McKenna

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Re: Dust cover and cover plate (Richard Spink, Mili Atoll)
« Reply #57 on: December 07, 2014, 09:05:55 PM »

Marty

From my understanding, the dust covers were on the inboard side of the wheel, so they must have served some function to protect the brake assembly, keeping dust out of the brakes I guess.  This is what I'm trying to definitively understand.

It would make sense that the photos of the outside of the wheels don't have dust covers, as you observed, as the dust covers were only installed on the inside of the wheel - I think - but I'd like to confirm.

Anyone have a better understanding?

Andrew

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Martin X. Moleski, SJ

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Re: Dust cover and cover plate (Richard Spink, Mili Atoll)
« Reply #58 on: December 07, 2014, 09:19:36 PM »

From my understanding, the dust covers were on the inboard side of the wheel, so they must have served some function to protect the brake assembly, keeping dust out of the brakes I guess.  This is what I'm trying to definitively understand.

What is the source of that idea?  Have you got a photo of any such dust cover (hub cap) installed over the brake assembly?

Most hub caps that I've seen go on the side of the wheel opposite the brake assembly.  I'm thinking of Piper Cubs and the like. 



Source: Hawaii.gov.
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Andrew M McKenna

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Re: Dust cover and cover plate (Richard Spink, Mili Atoll)
« Reply #59 on: December 07, 2014, 10:01:52 PM »

Marty

No, I don't have such a definitive photo showing the dust cover on either side, that is what I'm looking for so we all know what we're talking about, as I believe we are not all talking about the same thing.

From what I've been able to gather, the dust cover is intended on the inboard hub, not the outboard hub.

See my post #49 earlier today.  Those are both photos of the inboard side of the wheel.  compare those to your photo of the inboard side of the NZ electra, and it looks like there could be a thin metal dust cover over the brake assembly.

The exact nature of the dust cover is what I'm trying to get straight in my understanding.

amck
« Last Edit: December 07, 2014, 10:06:56 PM by Andrew M McKenna »
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