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5 blade props on 30' Spectre with 300XS's

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5 blade props on 30' Spectre with 300XS's

Old 08-13-2018, 10:34 AM
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Yeah, Dave wants me to try a set of 15 X 30 5-blades and go from there.
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Old 08-14-2018, 10:32 AM
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Originally Posted by Plum_Crazy View Post
Yeah, Dave wants me to try a set of 15 X 30 5-blades and go from there.
I just got off the phone with Dave and I am also ordering a set of his 15 x 30 5 blades.
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Old 09-07-2018, 04:55 PM
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Well tested my new Dave Dewald 5 blades today... 15" diameter x 30 pitch 5 blades

2 people on board
5/8 tanks of fuel
90 degrees
90 % humidity
Flat fresh water
Motors set at parallel

6000 Rpms
100 mph on GPS
5 % slip

Very happy with the numbers and his props. Will try them again when it cools off some in a couple weeks. Depending on the outcome of that may have him cut the diameter down to 14.75"
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Old 09-22-2018, 07:03 PM
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Finally got to try a set of 15 X 30 Dewald 5-blades today. It ran 104 @ 6700 with 2 people and 1/2 tanks. This is the fastest the boat has ever run with 2 people. I think there's still more to be had with more RPM, too. The connection to the water and the acceleration are noticeably better than my Merc 4-blade 15 X 32 cleavers. They are pretty as well.

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Old 09-25-2018, 03:15 PM
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Plum_Crazy > Where did you get that tunnel tab from ? I want to get one for my Spectre to help with the hop.
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Old 09-25-2018, 04:00 PM
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Originally Posted by skater View Post
Plum_Crazy > Where did you get that tunnel tab from ? I want to get one for my Spectre to help with the hop.
The tab was on there when I bought the boat. It's just a 1/4" thick piece of aluminum bolted to the K-plane.
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Old 09-25-2018, 06:36 PM
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Originally Posted by Plum_Crazy View Post
The tab was on there when I bought the boat. It's just a 1/4" thick piece of aluminum bolted to the K-plane.
Okay ... Thanks
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Old 09-27-2018, 01:48 PM
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That is the way we always did the tabs on the 30s
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Old 10-06-2018, 07:25 PM
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I got to run a set of 14.75" X 30P 5-blades today. The boat achieved a new top speed with just me, running 108 MPH @ 6850 RPM. It feels so stable at WOT. Love the Dewalds! The pic almost looks like 109, but it was right on the 108 mark.

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Old 02-05-2019, 05:04 PM
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UPDATE .... Dave cut my 30P 5 blade Dewalds from 15 inch down to 14.75 .. Between the cooler weather and cutting out that 1/4 inch of diameter I picked up 4 mph and 200 rpms..

2 people on board
5/8 tanks of fuel
74 degrees
52 % humidity
Flat fresh water
Motors set at parallel

6200 Rpms
104 mph on GPS
5 % slip
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