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 Author  Topic: Propeller Clearances for the 80' Eldo
Andy Small

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Andy Small  Posted on: Oct 19, 2019 - 2:05pm
PT-103-props.jpg

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Andy Small

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Andy Small  Posted on: Oct 19, 2019 - 2:30pm
And here is the stuff when they increased the wheels to 29 on PT-613 class (direct drive boats). Includes comparison chart with older 28 wheels.

PT613-wheels.jpg

PT613-wheels-page-2.jpg

PT613-wheels-page-1.jpg


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Andy Small

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Andy Small  Posted on: Oct 19, 2019 - 2:50pm
And here is the prop info from the Nov 43 Miami Trials. Both Elcos with 28 inch wheels.

Miami-Trials.jpg


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Jeff D

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Jeff D   Send Email To Jeff D Posted on: Oct 20, 2019 - 5:08am
Excellent, thank you Andy. I'm going to correct my page.


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Jeff D

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Jeff D   Send Email To Jeff D Posted on: Oct 20, 2019 - 6:19am
In the first letter I see the early 80' boats were supplied with a 30" for center and 28" on the wings? Was this order before they had a chance to test thoroughly and conclude straight 28's were the best?

Any idea of how the boats ran with the Elco Duchess D props? Another interesting bit...



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Andy Small

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Andy Small  Posted on: Oct 20, 2019 - 11:25am
Sorry for the poor resolution on the first letter. Here you go, all 28 inch wheels.

PT-103-props1.jpg


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Jeff D

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Jeff D   Send Email To Jeff D Posted on: Oct 20, 2019 - 12:37pm
Hah that's funny, the 28s looked just like 30s. Thanks again Andy!


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Drew Cook

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Drew Cook  Posted on: Oct 21, 2019 - 10:32am
Jeff,

So, you're saying the wing (outboard) prop shaft struts on the 80' Elcos kicked out to the sides, and weren't straight up-and-down?


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Gerry McGovern

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Gerry McGovern  Posted on: Oct 21, 2019 - 10:55am
The outboard struts on the ex-PT-486 were canted and matched the angle of the hull. The center strut was straight (although removed in these pictures). Here is a shot from 1984 with the newly installed 4 blade props (smoother than 3 blade).

j73BJ.jpg

This shot from 2017 shows the angle of the strut:

PT-486-011.jpg

The shafts were off set from the rudders:

PT-486-012.jpg

Former crew member of the Big Blue Sightseer ex-PT 486

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Jeff D

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Post a Reply To This Topic    Reply With Quotes     Edit Message     View Profile of Jeff D   Send Email To Jeff D Posted on: Oct 21, 2019 - 1:10pm
Yep Drew, from Dick's DVD:

Drawing_Elco_80_Strut_Angles.jpg



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