IVO InFlight Adjustable

[kitfox2009]

Hi Norm
Not sure about about the pitch. The model is a UR370+PE KFOX /912/80.
I told IVO the aircraft and engine type and this is what was recommended.
I get 5800 on takeoff and start putting a bit of pitch in through climb out to maintain 5500 or so. I usually cruise at 52 to 5400 if I want to get somewhere . Hardly ever run it under 5000 unless in the circuit.
When are you in the air?
Cheers
Don

[Norm]

I hope I can get those numbers out of my Fox. It will be a long time before I get my Model IV in the air, but I fly the Buzzard weekly. Probably why the fox is taking a long time to get going. Did you make it to this way this year?
Norm

[av8rps]

I'm glad to hear of success with the 70 inch. I think that just might be the best compromise overall. However, as stated, if I had a 72 inch I'd try that before cutting it down.

When I had to cut my blades down (due to water erosion when I tried the plastic prop-guard) I measured as accurate as I could, and then when done I weighed them with a really accurate scale, which told me I had to sand some off one blade yet (not even measurable however). My new cut down blades run really smooth doing it that way. So that would be my recommendation if you decide to cut your blades down later.

It's ironic how different we all operate our planes that are so similar, but apparently yet so different. I commonly will fly my 912ul around under 5,000 rpm, as it operates so smooth in the 4600-5000 range. And with full pitch and only 4800 rpm I easily cruise around at 105 mph with still probably an inch and a half of throttle available (and remember, I'm on 230 lb amphib floats). At 5200-5400 I feel like the engine is not as smooth. Oh, and for anyone wondering, I have verified both my ASI accuracy multiple times, as well as my tachometer accuracy. So these are real numbers.

I would love to see how my plane would do with an IVO prop and a big bore 912 putting out 110+ hp. I think that would be really SWEEEET!!

Has anyone out there flown a model 4 with the 100 hp 912 and the IVO IFA? If so I'm curious what performance you are seeing.

[herman pahls]

Hi Paul
I read this thread because I am interested in trying a Ivo prop on my model 4 Kitfox with 912 100hp on 29" ABW's.
I was hoping to hear from someone who has experience with this combination.
I have flown the IVO inflight adjustable for years on my 582 powered model 2 with excellent results.
With my 912 100 hp I have had great results with the Warp, 3 blade, 70" and taper tip but struggle with how long it takes to adjust the pitch.
I wish for the inflight adjust feature for getting 5800 RPM for take off without spending $7000 for the alternative.
I also would like to know how the IVO-IFA prop performs on a 100 hp 912 in a Kitfox.
Thanks
Herman

Thanks again for the sea plane base tour Oshkosh 2014

[kmach]

The IFA Ivo medium three blade should be what your looking for.
I have been using this on my 912 uls for around 300 hrs. I had a sensenich ground adjustable ez pitch on it before, I couldn't go back to a fixed or ground adjustable now !
I have the limiters set as to get the full 5800 on takeoff , and then usually set it for 5200 - 5400 cruise.
Todays flight -8C , climb 1200 fpm, cruise 5250 rpm, 108 IAS with wheel skis on , 70 lbs luggage , full fuel and 230 pilot .

On a model 4 with the 912 uls you should get some real nice performance.
I'm sure others with that exact setup will chime in.

[Esser]

Is that 108 Knots?

[DesertFox4]

Classic model 4- 661 lbs. empty weight.
Rotax 912 uls
Ivo in-flight Patriot prop.
Pilot - 210 lbs
Full fuel
5300- 5500 rpm's @ 5.8 gals per hour fuel flow.
Altitude. 4,500' above sea level
120-125 mph cruise
Top speed level full throttle- 132 mph.

Speed mods- stut fairings.

[kmach]

Is that 108 Knots?

No, mph .

108 Knots would be nice !

This is at 3000' asl and at 1340 take off weight.

[raffdhc6]

Hi Norm
Not sure about about the pitch. The model is a UR370+PE KFOX /912/80.
I told IVO the aircraft and engine type and this is what was recommended.
I get 5800 on takeoff and start putting a bit of pitch in through climb out to maintain 5500 or so. I usually cruise at 52 to 5400 if I want to get somewhere . Hardly ever run it under 5000 unless in the circuit.
When are you in the air?
Cheers
Don

Hi Don, I own a Kitfox 5 outback rotax 912 ul with a CSG 68 prop. I have 2 Ivoprop light - 1 is standard and the other Patriot (thinner) 1 blades is 34 iches. What is the blade you are using? What is your cruise speed at 75% power. Cheers Raff

[kitfox2009]

G`morning Raff
When I bought my Vixen it came with a 68 inch GSC. I never did fool around with the pitch but if I remember correctly it flew at MAX high 90`s MPH at about 5500 RPM at 2500 ASL.

I changed to a 70 inch IVO IFA on the recommendation of many folks on this forum. I elected to go with the Ultralite model as my 912UL is a mid 90`s version and may have a lighter drive than later engines. I sent the engine serial number and a/c type to IVO and ordered their recommendation,so I am not sure if it is Patriot blades or not. The prop now has over 600 hours on it, and like has been mentioned, the planetary/motor assembly on these is pretty small and can be subject short life if you are constantly dinking around with the pitch controller!
I would say this is a good low budget IFA setup for the 80 HP engines but, of course with deep pockets and 100+HP the Airmaster is definitely the way to go.
I am always surprised at how much throttle and/or pitch adjustment is necessary on cross country flights, especially in the mountains. The CS and a bunch of cash would take care of that!!
Oh, to answer your question, I can now cruise at 115 or so with the IVO.

I really believe in order to get performance and efficiency out of these small engines IFA pitch really helps.
Good luck with your experiment.
Cheers
Don