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Thread: IVO InFlight Adjustable

  1. #41
    Senior Member
    Join Date
    Mar 2009
    Location
    Summerland BC Canada
    Posts
    408

    Default Re: IVO InFlight Adjustable

    Quote Originally Posted by Norm View Post
    From the IVO website it says to use a hacksaw.
    If you wish to increase top speed or decrease cruise RPM, switch to a 2-blade prop or
    cut the 3-blade prop to smaller diameter using a hack saw. As long as you cut the same
    length piece from each blade, the prop will remain in balance.


    I would be careful about trimming the ends if you are getting good rpm cause I know you want to do more sandbar landings. A longer prop usually gives more pull and better climb.
    Happy New Year guys
    I know this is an OLD thread but I have a couple of questions regarding my 70 inch IVO IFA Ultra Light prop. I have run this now for over 700 hours on a Rotax 912 UL (80HP). over this period I have replaced the pitch motor once, the spool (stripped threads) twice, The carriers and pinion a number of times. Anyway the prop works very well, smooth and allows for better engine performance and fuel economy.
    BUT, Today I removed the IFA hub and installed my Ground Adjust plate for use while I am waiting for another "lead screw assembly" due to stripped threads on the "spool". I never noticed this before but in order to achieve fine pitch on the ground adjuster there is quite a bit of resistance required on the adjusting shaft!

    I am wondering if this excessive force required is what is prematurely damaging these IFA parts. The prop was purchased from IVO 9 years ago on their recommendation. It is possible that I have the "high pitch blades" The model says UR 370+PE. Not sure what that means.
    I know is is very easy to lug the engine with very little adjustment in flight.

    I am thinking of cutting the prop down in small increments. Do any of you folks have experience doing this? Do not want to mess up the balance. I suppose the other option is to purchase new blades low pitch.

    I realize many of you guys have gone on to bigger and better things (airmaster,etc) but my next birthday will match my HP so I would prefer to just fly a bit more without beating up the family`s inheritance too badly.

    Cheers and HAPPY NEW YEAR to the KF forum folks
    Don Hudgeon

  2. #42
    Senior Member
    Join Date
    Mar 2009
    Location
    Summerland BC Canada
    Posts
    408

    Default Re: IVO InFlight Adjustable

    Quote Originally Posted by kitfox2009 View Post
    Happy New Year guys
    I know this is an OLD thread but I have a couple of questions regarding my 70 inch IVO IFA Ultra Light prop. I have run this now for over 700 hours on a Rotax 912 UL (80HP). over this period I have replaced the pitch motor once, the spool (stripped threads) twice, The carriers and pinion a number of times. Anyway the prop works very well, smooth and allows for better engine performance and fuel economy.
    BUT, Today I removed the IFA hub and installed my Ground Adjust plate for use while I am waiting for another "lead screw assembly" due to stripped threads on the "spool". I never noticed this before but in order to achieve fine pitch on the ground adjuster there is quite a bit of resistance required on the adjusting shaft!

    I am wondering if this excessive force required is what is prematurely damaging these IFA parts. The prop was purchased from IVO 9 years ago on their recommendation. It is possible that I have the "high pitch blades" The model says UR 370+PE. Not sure what that means.
    I know is is very easy to lug the engine with very little adjustment in flight.

    I am thinking of cutting the prop down in small increments. Do any of you folks have experience doing this? Do not want to mess up the balance. I suppose the other option is to purchase new blades low pitch.

    I realize many of you guys have gone on to bigger and better things (airmaster,etc) but my next birthday will match my HP so I would prefer to just fly a bit more without beating up the family`s inheritance too badly.

    Cheers and HAPPY NEW YEAR to the KF forum folks
    Don Hudgeon

    Has or is anyone running a 68 or 69 inch with the high pitch blades? What are the results? I have an inquiry into IVO as well about cutting down these blades so the adjuster does not have to max out for fine pitch. The breaker has never blown!

  3. #43
    Senior Member
    Join Date
    Apr 2009
    Location
    Chisholm Mn
    Posts
    1,069

    Default Re: IVO InFlight Adjustable

    Pretty sure the + means high pitched blades. JImChuk

  4. #44
    Senior Member Dusty's Avatar
    Join Date
    Dec 2012
    Location
    Christchurch, New Zealand
    Posts
    316

    Default Re: IVO InFlight Adjustable

    I run an ivo on an 80 hp. My old motor had 68 inch fine pitch blades and I could just get enough adjustment to keep my revs in check. My new 80 hp motor with the 100 hp ratio ( I believe this the default ratio now) would redline at 3/4 throttle with these blades. I installed the high pitch blades at 72 inch but the 80 wouldn't get above 4800 static at full fine so I shortened them down in place with a cutoff grinder at 1/2 inch at a time. 68 is where I could get 5300 static ! Take off performance is identical but cruise is at least 5-10 kts faster than the original setup. After I was happy with the length I removed and checked the balance it was spot on.
    i hope this is of some help
    cheers
    Dusty

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