Re: IVO InFlight Adjustable
Quote:
Originally Posted by
Norm
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
Re: IVO InFlight Adjustable
Quote:
Originally Posted by
kitfox2009
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!
Re: IVO InFlight Adjustable
Pretty sure the + means high pitched blades. JImChuk
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
Re: IVO InFlight Adjustable
How often do you torque your prop bolts?