1st Winner
#13 7512-CV Revision 2 by tsalpha
Model 7512-C with V-Cup removed.
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2013-06-14 18:03:20
#7 7512-A Revision 4 by tsalpha
Original prop with tapered cup attempt removed. New cup height .75mm with 5.625mm radius. Blend transition from 35% to 45%, and 80% to 90%. There are no more fillets in the transitional blend, these are 100% natural nurb surface blends.
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2013-06-13 21:35:10
#8 7512-B Revision 4 by tsalpha
Original prop with tapered cup attempt removed. New cup height 1.125mm with 8.4375mm radius. Blend transition from 35% to 45%, and 80% to 90%. There are no more fillets in the transitional blend, these are 100% natural nurb surface blends.
more
2013-06-13 21:39:02
#9 7512-C Revision 4 by tsalpha
Original prop with tapered cup attempt removed. New cup height 1.5mm with 11.25mm radius. Blend transition from 35% to 45%, and 80% to 90%. There are no more fillets in the transitional blend, these are 100% natural nurb surface blends.
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2013-06-13 21:42:14
#11 7512-AV Revision 2 by tsalpha
Model 7512-A with V-Cup removed.
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2013-06-14 17:59:22
#12 7512-BV Revision 2 by tsalpha
Model 7512-B with V-Cup removed.
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2013-06-14 18:01:29
#1 7512-A & 7512-AV Props by tsalpha
This is only 7512-A and 7512-AV Props. Trying to figure out if my modifications are correct. All other props to follow, including xls data sheet.
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2013-06-11 03:44:39
#2 Screen Shot of 50% radius section view by tsalpha
Had to resubmit 7512 file to be able to add a new screenshot.
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2013-06-11 12:41:01
#3 7512-A Revision 2 by tsalpha
Original iges prop file with .75mm cup and 5.625 radius, from 40% diameter to 90% diameter.
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2013-06-12 20:44:25
#4 7512-B Revision 2 by tsalpha
Original iges prop file with 1.125mm cup height and 8.4375 radius, from 40% diameter to 90% diameter.
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2013-06-12 22:09:35
#5 7512-C Revision 2 by tsalpha
Original iges prop file with 1.5mm cup height and 11.25 radius, from 40% diameter to 90% diameter.
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2013-06-12 22:11:35
#6 Original Prop Tapered surface by tsalpha
This is the tapered surface on the trailing edge I'm referring to. Not sure if this is to remain on the modified prop or not. This is also the feature that gives all the trouble to making an easy modification.
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2013-06-13 13:00:14
#10 7512-AV V-Cup Question by tsalpha
Is the 7mm for the V-cup measured from the center of the hub, or from the intersection of the blade and the hub.
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2013-06-13 22:07:01
#14 Data Sheet for 7512 Props by tsalpha
I added another column for angle dimension,one at 2/3 and the other at 3/4 diameter.
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2013-06-14 18:05:44

Discussion

Titanium

Buyer

Thu, 13 Jun 2013 15:00:54 +0000
Okay you can ignore the taper - it is a cupping attempt

tsalpha

Designer

Thu, 13 Jun 2013 13:04:11 +0000
Just submitted a screenshot of the tapered surface I'm referring to. I'm not certain if this surface is to remain on the modified prop or not. This surface is also the feature that makes this modification difficult. I will try to increase the fillets between the original prop surface and the cupped surface to decrease the gradient.

Titanium

Buyer

Thu, 13 Jun 2013 01:35:40 +0000
the tapered section you were referring to - where is it ? can you render it a different color on the original prop drawing.Thanks for hotmail com

Titanium

Buyer

Thu, 13 Jun 2013 01:28:23 +0000
the introduction of the cupping look like too sudden with a 45 degree gradient - can you reduce the gradient by extending the area from 35% to 45% and 80% to 90% - the thickness and cupping looks great. palladium123

tsalpha

Designer

Tue, 11 Jun 2013 13:45:51 +0000
After the contest ends, I would like to exchange email addresses. That would be much easier to send and receive files and questions. Thanks,Tom

Titanium

Buyer

Tue, 11 Jun 2013 13:37:27 +0000
pls resubmit the drawings when ready.

Titanium

Buyer

Tue, 11 Jun 2013 13:36:21 +0000
great you got the idea of what i want - just need to reinstate the original thickness of the trailing edge and submit all my required drawings and dimensions. 2 first prize for you !!! More drawings coming up as I have a collection of prop design.