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Best prop was: Fuel consumption based on gallons per hour

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rjdaugh

Joined: 30 Aug 2006
Posts: 195

Posted: Fri Mar 23, 2007 7:20 am Post subject: Best prop was: Fuel consumption based on gallons per hour

Thanks for the plot Bob.  The points that don't look consistent are the ones

that I was wanting to repeat.  



It IS a big difference between props.  I am really much happier with my

plane now.  It doesn't mean that the Powerfin is a bad prop, it just means

it is not the right prop for this application.  I have trouble thinking of

my plane as a "fast" plane, but the Warp prop is better for this plane and

this engine.



Randy    -  70" Powerfin "F" prop for sale



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_________________
Randy
Kitfox 5/7 912S
Black Hills, South Dakota

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Fri Mar 23, 2007 8:01 am Post subject: Best prop was: Fuel consumption based on gallons per hour

Has any one tried the Kool prop?  There is a guy putting them on trikes and

says they are the best.  Not that I doubt him but he is the agent.



Noel



[quote] --

_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

RRTRACK(at)AOL.COM
Guest

Posted: Sun Mar 25, 2007 6:15 am Post subject: Best prop was: Fuel consumption based on gallons per hour

I would like to see a comparison between WD and the GSC. I have a three  blade GSC on my Kitfox 5 with the UL 912. Sure like the looks of it, but does it  perform?

 Mark

 Wisconsin



AOL now offtitle="http://www.aol.com?ncid=AOLAOF00020000000339" href="http://www.aol.com?ncid=AOLAOF00020000000339" target="_blank">AOL.com. 

  [quote][b]

lcfitt(at)sbcglobal.net
Guest

Posted: Sun Mar 25, 2007 7:29 am Post subject: Best prop was: Fuel consumption based on gallons per hour

Mark,



This question poses a few problems.  Mostly getting responses from guys that 

have used both on the same airplane.



I can give some general info which also brings in the problems with the 

comparisons.  This will be regarding Model IVs with 912UL engines.  In the 

beginning of the groiup summer flights we were a flight of 4 Kitfoxes and a 

Rans s-6.  The Rans doesn't count as it had a ULS and his experience was 

with a Warp and a NSI CAP 140.



Of the four Kitfoxes one flew behind a 582 and that doesn't count either. 

The three IVs with 912s, two had Warps and the other a GSC.  One of the Warp 

planes was definitely faster due to lots of fairings etc, but since we all 

flew the same speed for group reasons that airplane was distinguished by 

fuel economy, burning at least a gallon an hour less than the other two. 

One of the other airplanes - the one with the Warp was extremely light at 

604 lbs empty but was similar to the GSC in economy - tube gear, different 

fairings.  The big change came in when the GSC and light Warp went to the 

PowerFin.  Even after lots of time trying to find the most optimum pitch, a 

major drop off in cruise, but after trimming the inch of each blade climbed 

like you wouldn't believe with marginal improvement in cruise.  Eventually 

the one went back to his GSC and then to the cockpit adjustable IVO for 

significantly improved performance and the other to the Warp.



What does this all mean, who knows for sure.  The impression is that Warp 

will improve on the GSC, most definitely on the PowerFin and the IVO the 

best if you don't mind dealing with the complexity.



Lowell

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JimmieBlackwell(at)austin
Guest

Posted: Sun Mar 25, 2007 9:49 am Post subject: Best prop was: Fuel consumption based on gallons per hour

Mark



Just to add a bit of information to what Lowell provided.  I had a GSC prop 

and liked it ok.  Changed to a ground adjustable light weight IVO and have 

flown about 100 hours with it.



I have nothing against the GSC and actually I think it looks better on the 

Kitfox than the IVO.  However, the IVO is much easier to adjust.  The pitch 

on the IVO can be changed by turning one bold which adjusts all three blades 

at the same time.  This takes only a couple of minutes whereas the GSC is 

more involved because it is necessary to adjust each blade individually.



My observation is that I gained about 5mph in cruise with the IVO and it is 

definitely quieter than the GSC.  The only down side I know of  is that some 

people think the IVO is prone to coming apart.  My opinion is that the IVO 

is safe so long as it is installed properly and checked regularly according 

to the IVO specs.  Another word of caution on the IVO should you decide to 

get one;  be sure you get the right crush plates.  I had smooth hubs sent to 

me where they should have been knurled.  IVO did sent the correct plates 

immediately.



To do over again, I would still go with the IVO.



This is just my opinion.  Hope it helps.



Jimmie

---

clint_bazzill(at)hotmail.
Guest

Posted: Sun Mar 25, 2007 10:26 am Post subject: Best prop was: Fuel consumption based on gallons per hour

I have an Ivo Prop on my Model IV-1200.  Have 1200 hours behind it, that 

prop is great, almost all the Desert Fox Squadron flys with them.  My is in 

flight adjustable and have been with IVO prop since first flight in 1997.  

IVO props do not break or come apart.  Clint

From: "Jimmie Blackwell" <JimmieBlackwell(at)austin.rr.com>

Reply-To: kitfox-list(at)matronics.com

To: <kitfox-list(at)matronics.com>

Subject: Re: Re: Best prop was: Fuel consumption based on 

gallons per hour

Date: Sun, 25 Mar 2007 12:49:02 -0500




<JimmieBlackwell(at)austin.rr.com>



Mark



Just to add a bit of information to what Lowell provided.  I had a GSC prop 

and liked it ok.  Changed to a ground adjustable light weight IVO and have 

flown about 100 hours with it.



I have nothing against the GSC and actually I think it looks better on the 

Kitfox than the IVO.  However, the IVO is much easier to adjust.  The pitch 

on the IVO can be changed by turning one bold which adjusts all three blades 

at the same time.  This takes only a couple of minutes whereas the GSC is 

more involved because it is necessary to adjust each blade individually.



My observation is that I gained about 5mph in cruise with the IVO and it is 

definitely quieter than the GSC.  The only down side I know of  is that some 

people think the IVO is prone to coming apart.  My opinion is that the IVO 

is safe so long as it is installed properly and checked regularly according 

to the IVO specs.  Another word of caution on the IVO should you decide to 

get one;  be sure you get the right crush plates.  I had smooth hubs sent to 

me where they should have been knurled.  IVO did sent the correct plates 

immediately.



To do over again, I would still go with the IVO.



This is just my opinion.  Hope it helps.



Jimmie

---

kitfoxmike

Joined: 05 Dec 2006
Posts: 373

Posted: Sun Mar 25, 2007 3:06 pm Post subject: Re: Best prop was: Fuel consumption based on gallons per hou

thanks for the report on the IVO, looks like I'll be ordering one in.

cathyboone(at)softcom.net
Guest

Posted: Wed Mar 28, 2007 9:37 pm Post subject: Best prop was: Fuel consumption based on gallons per hour

Looking for opinions,

I have an S5 and will be putting on the 912 ULS. I also purchased the IVO 

medium 72". I am thinking about mounting the IVO in the 2 blade 

configuration to save weight and wanting to put the plane on floats later 

on. Has anyone tried the IVO 72" 3 or 2 blade?

---

kitfoxmike

Joined: 05 Dec 2006
Posts: 373

Posted: Sun Apr 01, 2007 9:20 am Post subject: Re: Best prop was: Fuel consumption based on gallons per hou

Holy crap, I just flew with a new IVO 70".  Man O man, what a difference. I can run down the runway at 80mph and pull up and hit 1800ft per minute without having to neutral the stick, just kept climbing.  So far cruise is at least 15mph faster.  WOW is all I can say.  This is the prop for my plane.

Clem Nichols

Joined: 10 Jan 2006
Posts: 88
Location: Munfordville, Ky

Posted: Sun Apr 01, 2007 4:22 pm Post subject: Best prop was: Fuel consumption based on gallons per hour

Mike:



What prop were you using before you switched to the IVO?  Your report is 

very interesting, to say the least, but only half complete.



Clem Nichols

---

kitfoxmike

Joined: 05 Dec 2006
Posts: 373

Posted: Mon Apr 02, 2007 6:06 am Post subject: Re: Best prop was: Fuel consumption based on gallons per hou

The slug was a powerfin 68".

Clem Nichols

Joined: 10 Jan 2006
Posts: 88
Location: Munfordville, Ky

Posted: Mon Apr 02, 2007 7:00 am Post subject: Best prop was: Fuel consumption based on gallons per hour

Does this mean that your previous post was not an April Fool's joke?  :>)



Clem Nichols

Do Not Archive

---

kitfoxmike

Joined: 05 Dec 2006
Posts: 373

Posted: Mon Apr 02, 2007 7:35 am Post subject: Re: Best prop was: Fuel consumption based on gallons per hou

Sorry, this is not a joke.  That IVO is one amazing prop.  The air was pretty unstable yesterday so I went up on a second flight in the afternoon.  I stayed in the pattern and had fun fun fun, doing touch and goes.  From a stop I would take off, as soon as the plane lifted off I would pitch it for 50, rpm of 5400 and the climb rate was a constant 1800fpm.  If I come around and did a wheel landing and run 5 ft off the runway and run up to 80ias and then pull up, nice g's on the face and maintain 50, I would jump to 2000fpm and then stable out to 1800fpm.  Needless to say, I was smiling and having fun, I never changed the pitch of the prop in the pattern, left it flat.  Oh, mine is inflight adjustable.

thesupe(at)hotmail.com
Guest

Posted: Mon Apr 02, 2007 11:04 am Post subject: Best prop was: Fuel consumption based on gallons per hour

Was it a 3 blade with the F blades?  (like I have hanging on my wall and was 

thinking about trying on my Avid)  Also, which IVO blades do you have, 

ultralight or mediums?    Thanks,  Jim Chuk

 	  Quote: 	
		  From: "kitfoxmike" <customtrans(at)qwest.net>

Reply-To: kitfox-list(at)matronics.com

To: kitfox-list(at)matronics.com

Subject: Re: Best prop was: Fuel consumption based on gallons 

per hour

Date: Mon,  2 Apr 2007 07:06:49 -0700






The slug was a powerfin 68".



--------

kitfoxmike

model IV, 1200

speedster

912ul

Do not archive





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kitfoxmike

Joined: 05 Dec 2006
Posts: 373

Posted: Mon Apr 02, 2007 12:25 pm Post subject: Re: Best prop was: Fuel consumption based on gallons per hou

the powerfin is the f-72 shortened to 68".  The IVO is the ultralight prop. Thing is I feel I've wasted all this flying time with a S L O W or D O G prop.

kitfoxmike

Joined: 05 Dec 2006
Posts: 373

Posted: Mon Apr 02, 2007 12:25 pm Post subject: Re: Best prop was: Fuel consumption based on gallons per hou

sorry 3 blade powerfin. The IVO is 3 blade.

lcfitt(at)sbcglobal.net
Guest

Posted: Mon Apr 02, 2007 3:47 pm Post subject: Best prop was: Fuel consumption based on gallons per hour

I think in the interest of fairness and letting it all hang out.  On the 

various flights to, during and from the fly-in in arizona a couple of 

things.



The flyijng buddy with the PowerFin has a screamer.  Somehow one of the 

fastest airplanes in the group.  And we made two remote field landings to 

service the electrics on two of the IVOs.  One from a loose wire and the 

other a stuck brush.  In both instances the prop would not move to coarse 

pitch leaving the pilots unable to keep up in the group flights.



Lowell

---

kitfoxmike

Joined: 05 Dec 2006
Posts: 373

Posted: Mon Apr 02, 2007 4:31 pm Post subject: Re: Best prop was: Fuel consumption based on gallons per hou

I think in the interest of fairness, I can hit a happy mediun with the IVO and make it a fixed pitch and do better than the powerfin.

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