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View Full Version : GSC to IVO on 582 2.62



LSaupe
07-06-2016, 06:47 PM
I will soon be ordering an IVO to replace my 68" 3 blade GSC. 582, C box, 2.62 Kitfox III.

Ivo is suggesting a 68" 3 blade ultralight. I have heard (somewhere) that maybe a 70" 3 blade Ivo UL is better in this application.

Anyone have experience in this arena?

With regard to CG concerns, anyone know what this GSC weighs in at? I see the IVO is listed at ~ 8 lbs. Guessing the GSC might be much more?

Larry

TY2068
07-26-2016, 07:32 AM
Have you thought about going 3:1 with 70-72" IVO MED. GA and RK-400 clutch ?

Geowitz
07-26-2016, 10:39 AM
You can get the 70 inch, try it, and cut it down on your own. IVO even has instructions on how to do it with a fine hacksaw blade.

LSaupe
09-09-2016, 10:48 AM
In the for what its worth department. GSC (with all hardware) weighed in at exactly 10.0 lbs this morning. Thats a 68" 3 blade.

68 inch 3 blade IVO came in at 8.9 lbs.

Considerable improvement in climb performance and smoothness at lower RPM. Smooth at all RPMs above 2500 actually.

Very impressed with the performance. With zero adjustment was getting 6100 static (which is what I was shoot for).

If I need to make adjustments down the road, is it clockwise on the threaded rod to increase pitch and vice versa?

Also, anyone know how many RPM change you get per turn (or 1/4 turn)?

beeryboats
10-01-2016, 03:00 PM
I have almost the same setup in my IV. The wood prop has to go! It was way beyond TBO. I'm still trying to decide what to buy. I love the idea of the IVO single screw adjustment for all three blades. But I've heard the Warp Drive is a good prop for less money. I'm still undecided. Are there any other good props I should be looking at?

Norm
10-01-2016, 05:28 PM
In the for what its worth department. GSC (with all hardware) weighed in at exactly 10.0 lbs this morning. Thats a 68" 3 blade.

68 inch 3 blade IVO came in at 8.9 lbs.

Considerable improvement in climb performance and smoothness at lower RPM. Smooth at all RPMs above 2500 actually.

Very impressed with the performance. With zero adjustment was getting 6100 static (which is what I was shoot for).

If I need to make adjustments down the road, is it clockwise on the threaded rod to increase pitch and vice versa?

Also, anyone know how many RPM change you get per turn (or 1/4 turn)?
Clockwise for more Pitch. I think 200 rpm per turn but might be 100. Can't remember for sure.

LSaupe
10-03-2016, 05:25 PM
Take a look at Powerfin as well.

beeryboats
11-02-2016, 04:57 PM
I had a prop post in the general discussion area and one reply said that the three blade IVO was not a good prop with the 3:1 gearbox. Harmonics were the issue. Has anyone else heard this?

TY2068
11-03-2016, 04:39 AM
Call IVO, that's what they will tell you. 3:1 C they say 70-72" 2-Blade medium.

TY2068
11-05-2016, 07:12 AM
I like my 72" so far. Along with the RK-400 clutch it seems like a good set-up. Easy to dial in max static rpms (I have it set to 6,200-6,300). Plane leaps off the ground and cruises around 75.

Av8r_Sed
11-06-2016, 05:52 PM
I've got the same setup except it's 70". I set my static to 6000 RPM and see 80 mph cruise and still have pretty good climb.

Remember to keep up with retorquing at 10 hour intervals if it's a new prop. Over time I've been able to stretch that out a bit.

TY2068
11-11-2016, 06:23 AM
Hi Paul, I was wondering why you opt to have your prop set to get 6,000 max static. After installing my prop all indications (I read it on the internet) were that 6,200-6,300 static was the targeted rpm range to shoot for. Being you have a good amount of experience I'm thinking you have a good reason.

Again thanks for your advice and assistance when I was having problems with getting lower idle. I finally worked it out as a carb slide and cable issue. The engine key bump starts and idles around 2,000 once it warms and settles down a bit. I really like the IVO and RK clutch combo so far. Totally different machine vs. the 68" 3 blade GSC and no RK.

Av8r_Sed
11-11-2016, 08:38 PM
I chose the lower static because I wanted the higher cruise more than maximum climb performance. Since all my flying is with field elevations below 1000 MSL climb is still more than sufficient.

TY2068
11-12-2016, 08:46 AM
Hi Paul,

That sounds logical. I was thinking maybe you had yours set more course to limit peak rpms in the air at full throttle. Much of what I read said to shoot for 6,200 with this prop. I believe 6500 is the max allowable for a short period with 6,800 being redline revs. I may dial in a bit more pitch and try that out.

Thanks

Olle1975
05-29-2017, 04:14 AM
I've got the same setup except it's 70". I set my static to 6000 RPM and see 80 mph cruise and still have pretty good climb.
Hi!

2 Blade or 3?

Ratio 2.62?

Which rpm do you call cruise?

Thanks!

Olaf

TY2068
05-29-2017, 05:10 PM
If you read down the thread (and past posts) Olie you'll see Av8r_Sed is running a 70" IVO Ground Adjustable 2-Blade Medium and Hacman altitude compensator with a 3:1 C gearbox w/RK-400 clutch.

I'm running a 72" Ground Adjustable 2 Blade medium IVO on a 3:1 w/RK-400 clutch. I'm low hours but all seems very good so far. The clutch changed the whole dynamic of flying a 582 in my mind. I don't like my plane being vibrated and shaken to bits. Anyway "Cruise" in my mind is either loafing along at 60-65mph at @5,200-5,3000 seeing the sights (with door(s) open) or screaming across the countryside at 5,800+ doing somewhere around 80 IAS. Peak static RPM's are 6,000-6,200.

I was warned to stay out of the midrange RPM's (5,300-5,500) for prolonged periods. I forget exactly why but ok whatever. I heed warnings from the experienced first and eventually make up my own personal rules later ;)

Don't think you can go wrong either the IVO medium 2-Blade IFA-GA or 3-Blade IVO UL GA-IFA. Do German rules allow IFA props in the experimental class ?

TY2068
05-29-2017, 08:22 PM
Correction, I was warned to stay out of mid-range RPM's (4,000-5,000) as much as possible.

LSaupe
06-01-2017, 02:22 AM
I chose 6100 static (3 blade Ivo 68" and 2.62). Works great across the board. Lost 5 mph cruise speed by going to a higher static number (6300) and not much different t.o. and climb performance so settled in on 6100 and am very happy with it.

Bud Davidson
06-01-2017, 05:31 AM
I have followed closely this discussion. I used an IVO on a Ford V6 in my earlier homebuilt and being able to ground adjust for optimizing performance was great.

I have now finished my fuselage and ready for paint. All systems installed and working except brakes. This includes engine fully functioning. IVO has agreed with the recommendation made by some that an ultralight 68"" three blade is a good choice.

Question: Is there a rpm range to be avoided with a Rotax 912 UL with this prop application?? Is this something I need to consider in selecting a prop??

Bud
IV-1200
912. UL