J Series Experience & Updates

Airboat propeller discussion.
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kwanjangnihm
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J Series Experience & Updates

Postby kwanjangnihm » Fri Feb 02, 2018 12:54 pm

J Series Experience & Updates

Waterthunder wrote: We tested 3 different blades back to back to back with the same air temp, humidity and corrected altitude - the proto type blade made more thrust in a 3 blade configuration than the 4 blade R did

Should we assume the proto type is now the JR blade, or did the new JX blade make more thrust than the R?

Waterthunder wrote: The real interesting part is the proto 3 blade and 4 blade NGR had the same pitch to stall at 5,500 so that gives you an idea how much more efficient the new blade is. It uses less area than a 4 blade but the same pitch and produces more thrust

Same question as above: is this the 3 blade JR or JX outperforming the 4 blade NGR?

In each scenario, the 3 blade proto outperforms a 4 blade counterpart.

Does anyone have any feedback or experience with the J series to comment on this performance information?

Has anyone actually lost a blade and gone to a 3 blade from a 4 blade setup?
" I don't care who you are back in the world, you give away our position one more time, I'll bleed ya, real quiet. Leave ya here. Got that? "

loudmouse
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Re: J Series Experience & Updates

Postby loudmouse » Fri Feb 02, 2018 11:48 pm

4 blade JX here and I wouldn't change it. That coming from a 3 blade NGR. The NGR is agreat prop also. Jus Sayn! Luv me some JX at 800hp on its ass will push hard down low and fly up top.
15' Alumitech deckover LSX TT Oxbox 84" JX 4-blade
Gas required Water optional :dontknow:
Built and Tuned by Me
14'X8' JW, Chevrolet 122CID LNF Turbo Engine, Ox box, 80" NGR 3 blade

Life is short, eat your dessert first! :downtown:

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BluByU2
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Re: J Series Experience & Updates

Postby BluByU2 » Sun Feb 04, 2018 2:37 pm

Well, I'm going to find out how well a 3 blade 80" JX setup will work on my rig because I plan on ordering it this week.

loudmouse
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Location: Ocala Fl

Re: J Series Experience & Updates

Postby loudmouse » Sun Feb 04, 2018 2:46 pm

If u have over 500hp I don't think you will be disappointed. I also am a believer in prop rpm over pitch unless your boat is a tractor and not concerned with speed.
15' Alumitech deckover LSX TT Oxbox 84" JX 4-blade
Gas required Water optional :dontknow:
Built and Tuned by Me
14'X8' JW, Chevrolet 122CID LNF Turbo Engine, Ox box, 80" NGR 3 blade

Life is short, eat your dessert first! :downtown:

wes30
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Re: J Series Experience & Updates

Postby wes30 » Wed Feb 14, 2018 9:43 am

I couldnt be happier with my 80"jx 2 blade,,,450hp sbc 237 box ,,pitch set on 20degrees goes anywhere i want with my 4 people family

SWAMPHUNTER45
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Re: J Series Experience & Updates

Postby SWAMPHUNTER45 » Wed Feb 14, 2018 9:47 am

WES what are the degree ranges with that hub?

Is 20 pitched hard ?

wes30
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Re: J Series Experience & Updates

Postby wes30 » Wed Feb 14, 2018 10:10 am

I believe 8 to 30

loudmouse
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Re: J Series Experience & Updates

Postby loudmouse » Wed Feb 14, 2018 10:12 am

Not real sure how the sticker relates to actual degrees but it appears the 20 mark is relevant to the old way of the 2 mark. Should be the sweet spot for both pitch and rpm with a 2.38 box.

Wes, what is your cruz rpm with the 2 blade if ya don't mind sharing that?
Last edited by loudmouse on Wed Feb 14, 2018 10:22 am, edited 1 time in total.
15' Alumitech deckover LSX TT Oxbox 84" JX 4-blade
Gas required Water optional :dontknow:
Built and Tuned by Me
14'X8' JW, Chevrolet 122CID LNF Turbo Engine, Ox box, 80" NGR 3 blade

Life is short, eat your dessert first! :downtown:

wes30
Southern Airboat Member
Posts: 100
Joined: Sun Oct 23, 2011 10:25 am
Location: suwannee,county

Re: J Series Experience & Updates

Postby wes30 » Wed Feb 14, 2018 10:13 am

At 20 degrees im turning 5200 rpm wot ,13'6 hammant ,im cruising right around 3100 with 4 people deep water or course

loudmouse
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Location: Ocala Fl

Re: J Series Experience & Updates

Postby loudmouse » Wed Feb 14, 2018 10:39 am

I prefer a good balance of low cruz rpm, low rpm push, high rpm push and top speed. Sounds jus like the way you have it set. If you changed it what you gain in the upper rpms you will loose on ur cruz rpm which is where 50% of the run time is anyways. It would be good info to change ur setup to a 3 blade with ur box a 2.55 and a 2.68 and compare numbers with ur hp for the JX. I would like to know if 400/450 hp would give good numbers with the JX 3 blade. I know the 3 blade NGR works well with that hp range.
15' Alumitech deckover LSX TT Oxbox 84" JX 4-blade
Gas required Water optional :dontknow:
Built and Tuned by Me
14'X8' JW, Chevrolet 122CID LNF Turbo Engine, Ox box, 80" NGR 3 blade

Life is short, eat your dessert first! :downtown:

wes30
Southern Airboat Member
Posts: 100
Joined: Sun Oct 23, 2011 10:25 am
Location: suwannee,county

Re: J Series Experience & Updates

Postby wes30 » Wed Feb 14, 2018 11:37 am

Yes would definetely like to find out

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kwanjangnihm
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Re: J Series Experience & Updates

Postby kwanjangnihm » Thu Mar 15, 2018 7:35 pm

BluByU2 wrote: Well, I'm going to find out how well a 3 blade 80" JX setup will work on my rig because I plan on ordering it this week.

Blu any updates on your new JX setup? Interested to see how it performs compared to your old prop!! :salute:
" I don't care who you are back in the world, you give away our position one more time, I'll bleed ya, real quiet. Leave ya here. Got that? "

loudmouse
Southern Airboat Member
Posts: 479
Joined: Tue Jan 22, 2013 3:20 pm
Location: Ocala Fl

Re: J Series Experience & Updates

Postby loudmouse » Thu Mar 15, 2018 8:37 pm

:shock:
15' Alumitech deckover LSX TT Oxbox 84" JX 4-blade
Gas required Water optional :dontknow:
Built and Tuned by Me
14'X8' JW, Chevrolet 122CID LNF Turbo Engine, Ox box, 80" NGR 3 blade

Life is short, eat your dessert first! :downtown:

redfishrascal
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Joined: Sun Feb 26, 2017 10:56 am

Re: J Series Experience & Updates

Postby redfishrascal » Thu Mar 15, 2018 9:16 pm

I have 3 blade 82" JX with alittle over 500hp SBC and love it.

redfishrascal
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Re: J Series Experience & Updates

Postby redfishrascal » Thu Mar 15, 2018 9:17 pm

Oh and a 255 OX Box


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