Best prop to use

Airboat propeller discussion.
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Kennethbash321
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Best prop to use

Post by Kennethbash321 » Sun Nov 30, 2014 6:33 pm

What's the best 2 blade prop to use for a 500 Cadillac dd on a 13 ft gilleo

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sidejobs
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Re: Best prop to use

Post by sidejobs » Sun Nov 30, 2014 6:38 pm

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plumcrazy
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Re: Best prop to use

Post by plumcrazy » Sun Nov 30, 2014 7:11 pm

72 inch power plus 2 blade by water walker pushes like crazy

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sidejobs
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Re: Best prop to use

Post by sidejobs » Sun Nov 30, 2014 7:48 pm

Until it comes apart :shock:
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SWAMPHUNTER45
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Re: Best prop to use

Post by SWAMPHUNTER45 » Sun Nov 30, 2014 8:00 pm

Oh boy! :stirpot:

I know two boats that push really well with the Sensenich NGQ and Q blade props.

The length really depends on how good a engine you have to spin it. A bone stock engine would probably work well with a 72 inch Q but a modified engine can spin up a 74 to 76 inch with little trouble. I have found the Q up be a really good all around prop for both push and speed. The new NGQ seems to push better and is very quiet. Another DD Caddy regular on here is reporting great results with a Bow Tie set up so dig into the old threads and don't be scared to call the manufacturer or speak with some of the dealers on here.

Gangreen
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Re: Best prop to use

Post by Gangreen » Sun Nov 30, 2014 8:02 pm

Check into why props other than a wood prop snaps on Caddys. Warp Drive does not recommend a DD setup.Also a friend of mine just snapped the end of a crank off of a caddy with a 2 blade Sensenich.

SWAMPHUNTER45
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Re: Best prop to use

Post by SWAMPHUNTER45 » Sun Nov 30, 2014 8:02 pm

By the way WELCOME to the Southern Airboat site !

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ptr34
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Re: Best prop to use

Post by ptr34 » Mon Dec 01, 2014 2:19 am

DD caddys need the harmonic balancer on motor to help keep harmonics out of prop. And a NGQ would be awesome on it.. And fyi Sidejobs broke a crank with Excalibur 4 blade bowtie. So u cant go blaming a Sensenich blade for y crank broke
if u don't run dry .then should have gotten a bassboat
tons videos on YouTube ptr34

fl cracker
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Re: Best prop to use

Post by fl cracker » Mon Dec 01, 2014 11:58 am

ptr34 wrote:DD caddys need the harmonic balancer on motor to help keep harmonics out of prop. And a NGQ would be awesome on it.. And fyi Sidejobs broke a crank with Excalibur 4 blade bowtie. So u cant go blaming a Sensenich blade for y crank broke
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Deano
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Re: Best prop to use

Post by Deano » Mon Dec 01, 2014 1:48 pm

Gangreen wrote:. . . a friend of mine just snapped the end of a crank off of a caddy with a 2 blade Sensenich.
Out of curiosity, which journal did your buddy's crank break at ?

Not to say that your buddy did or did not, but rather, in defense of prop manufacturers everywhere,
it should be pointed out that 'press fit' when installing the hub/dampener/balancer means exactly that.

Using a BF & FI approach rather than proper tools to install and/or remove the crank
hub can promote a broken crankshaft over time, especially in an airboat application.

I have often wondered how many times a prop manufacturer got credit for a broken crankshaft
because at some prior point in time, somebody got impatient and used the wrong approach.

On a different note, it is my opinion that Sidejobs' crank had nothing in common with any other broken Caddy cranks spoken of here (or elsewhere) and has no justifiable reason for inclusion with this subject matter.
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but it is not the path to knowledge; it has no place in the endeavor of science."
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ptr34
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Re: Best prop to use

Post by ptr34 » Mon Dec 01, 2014 1:51 pm

Just showing that any crank can break. And I know sidejobs had a good crank in his motor .not no junk.
if u don't run dry .then should have gotten a bassboat
tons videos on YouTube ptr34

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sidejobs
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Re: Best prop to use

Post by sidejobs » Mon Dec 01, 2014 3:29 pm

Most caddy cranks break at the rear of the last rod journal. It has lil or nothing to do with which prop you run. I have only had two cranks break out of several engines I've ran. Only one of those was due to the prop. A blade came out of the hub due to poor quality in the lamination/bonding process and I was wide open at 3050 when it happened. A loud bang as the one blade hit the side of the boat , then the boat started shaking and I shut it down, key was turned off when crank and hub and other blade went through the rudders and out the top of the cage. This story had been told a few times and deleted. I will leave out my details of dealing with the pos company, thier people and the manufactures name. Although the name has changed so why would it matter. Lol
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Re: Best prop to use

Post by Gangreen » Tue Dec 02, 2014 7:17 pm

I am told the 2 blade Sensenich prop (not blaming the prop) broke off on 1 blade swinging was very shaky at that point (of course). Then it broke the crank and the back of the block.

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Re: Best prop to use

Post by Gangreen » Wed Dec 03, 2014 5:48 pm

I have been corrected. It was a water walker 2 blade that snapped and then with 1 blade spinning the crank broke right behind the last rod bearing area.

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