Modification to Props

Contest Ended, Winner(s) have been selected.
Description:
to incorporate some radius requirements at the trailing edge of props, to take measurement of height and angle before and after incorporation. To supply 6 drawings and measurements in iges format.
Wants:
to achieve smoothness and gradual gradient of the design.
Software:
  1. SolidWorks

Entries

1st Winner
#13 7512-CV Revision 2 by tsalpha
Model 7512-C with V-Cup removed.
more
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.
more
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.
more
2013-06-13 21:42:14
#11 7512-AV Revision 2 by tsalpha
Model 7512-A with V-Cup removed.
more
2013-06-14 17:59:22
#12 7512-BV Revision 2 by tsalpha
Model 7512-B with V-Cup removed.
more
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.
more
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.
more
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.
more
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.
more
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.
more
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.
more
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.
more
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.
more
2013-06-14 18:05:44

Discussion

tsalpha

Designer

Fri, 14 Jun 2013 18:07:38 +0000
That should be it for the 7512 set of props. Please close this contest. I will try to have the 7016 series finished by Monday. Thanks.

Titanium

Buyer

Fri, 14 Jun 2013 14:47:07 +0000
All good and correct. As for the V-cut - 2nd drawing - starts from the edge of HUB not from the center of the prop.

Finish up and 2 Gold medals for you and you can concentrate on the super charger .

tsalpha

Designer

Thu, 13 Jun 2013 22:11:05 +0000
Please check revision 4 for 7512-A, 7512-B, 7512-C, I think we may have it. I also have a question in regards to the V-Cup dimension. Please see design 10. After the V-Cup is taken care of I will have everything I need to finish all of the 7016 props.

tsalpha

Designer

Wed, 12 Jun 2013 20:48:24 +0000
Still need to know if tapered surface along original trailing edge remains on new prop. Please check current revision.

Titanium

Buyer

Tue, 11 Jun 2013 14:28:47 +0000
Yes now you are on the right track cupping from 40% - 90%, trailing edge original thickness with thickness increasing towards the hub.

tsalpha

Designer

Tue, 11 Jun 2013 12:48:49 +0000
I was unclear in regards to cupping starting at 40% and ending at 90%. My current model has the cupping along the entire trailing edge, this could be modified with additional information. Also unclear about trailing edge thickness, original prop has blade becoming thicker towards the hub at the trailing edge. Without any info, I made my trailing edge the same thickness as the leading edge.

Titanium

Buyer

Tue, 11 Jun 2013 08:55:22 +0000
could not really see that the cupping starts at 40% of radius and end at 90% of radius. Can you show me a cross section view at 50% radius so I can see the curvature at 30 degree and the drop in mm.

tsalpha

Designer

Tue, 11 Jun 2013 03:45:47 +0000
Design submitted for first modification, rest to follow, if these are correct.

Titanium

Buyer

Sun, 28 Apr 2013 03:59:58 +0000
Revised H1 H2 Angle uploaded, disregard previous file.

Titanium

Buyer

Sat, 27 Apr 2013 23:57:09 +0000
that drawing is not to scale - diameter is 75 mm - 2/3 diameter is 50 mm - the radius should be 12.5 mm. Use this radius intersects with the leading & trailing edge to measure the angle..

tsalpha

Designer

Sat, 27 Apr 2013 16:45:45 +0000
In your picture H1 H2 angle, 3/4 diameter seems correct, but shouldn't 2/3 diameter be 1/2?

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