New propeller for 914UL MT-03 / MTO Sport ?

rcflier

Junior Member
Hi.
I just bought this machine and afterwards discovered, the propeller has sort-of delaminated.
The fiber (glass?) har separated from the foam on a good part of the flat side of one blade.
Repair or new? If new, then which one? Bolly Magnum?

TIA
Cheers
Erik
 

fara

AR-1 gyro manufacturer
Absolutely new.
I wish this was the first or second time I heard of this delamination of HTC prop.
Duc or Kiev Prop, Sensenich Prop or Warp Drive are good solid candidates. Warp drive has a high MOI and it tends to cause pre-mature damage to the gearbox over the long term. We use Kiev Prop right now 3 blade
Best of luck and safe flying
 

twistair

Living in the Skies
Erik,

Original HTC propellers are real junk, that is. They won't last long and there were many failure reports on them.

I tried different props for gyros and found (well, to the moment) that the best for the money would be Luga Prop. It has good thrust at low speed (for efficient take-off and safer flying at low altitudes), good thrust distribution from low speed to Vmax, and it has good leading edge protection which is a must for pusher prop. The least trump is that it costs two times less than any "Western" prop. I tried DUC, Helix, AirPlast and others - some are very good but they just cost two times more. KievProp is same inexpensive as Luga but it has not that good leading edge protection and it apparently has worse thrust through speed distribution.

I'd recommend 3-blade Luga for a 100 hp R912 engine and a 4-blader for a R914.

Check them at http://www.lugaprop.kiev.ua/index_en.html
 

rcflier

Junior Member
Yes, we have one gyro with the six-bladed e-prop. But the price...Arrrgh...

One problem is.. I have to buy one of the few propellers certified for the MTO Sport.
Those are HTC 3-blade (oh no), maybe a Woodcomp and then the IVO with the electric pitch control.
One is said to be crap (well, I know) and the IVO is soft and wobbly and extemely expensive.

If I don't I have to test the noise and I'm afraid whatever I'll buy will be too loud....

I'd much rather buy a Bolly Brolga Magnum or a Luga.

Cheers
Erik
 
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rcflier

Junior Member
Twistair,
The HTC prop is of 172 cm (68") diameter, and I don't remember the clearance to the tail.
(I can't easily get to my gyro. It's in a state airport, not a local one. Fences, security etc.)
Maybe I should write them, as none of their props seem to fit my needs?

Hmm, Scott is suggesting an AeroProp... They have a picture of one on a MT-03 gyro..

Cheers
Erik
 
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twistair

Living in the Skies
There is still enough clearance for a 175 cm prop, Erik. Most of German gyros here in Russia fly with these 175 cm Luga props. The thing is that you'll need another spacer to install such prop since it has 75 mm bolts pattern. I also use to make these spacers a bit longer than standard HTC spacer is. This adds some prop efficiency.

DSC_0064_002.jpg
 

rcflier

Junior Member
My gyro has the two side mounted radiators, not the one in front of the propeller. That should help some.

But no one is showing any suggested prices...

Cheers
Erik
 

rcflier

Junior Member
Yesterday I got some good news: New European regs favoring gyros have been passed.

I was told: Go get the prop you want - we'll figure out the Mickey Mouse afterwards.

So I have asked several east european suppliers for propeller suggestions for my 914 - and prices.

Cheers
Erik
 

twistair

Living in the Skies
So I have asked several east european suppliers for propeller suggestions for my 914 - and prices.
Just a small remark: there are some sellers there who offer same Luga props under various other names =) One example is here on the forum: https://www.rotaryforum.com/threads/selling-3-bladed-carbon-fiber-propeller-right-rotation.46108/ He even uses photos taken from Luga website painting out the Luga prop logo on these photos.:ROFLMAO:

Contacting manufacturer directly saves you some cash ;)
 
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rcflier

Junior Member
Twistair, he was not among them...:cool:

I sent to Luga, Aeroprop and Kool.

E-prop is nice, but I can't find enough info to choose between 3, 4 or six blades.
And they are pricey.

Cheers
Erik
 
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rcflier

Junior Member
Well, I see no reason to send the propeller to Canada and most of the way back again...;)
I'm looking forward to a reply from Lugaprop. And I better get my gyro home, so I have good access.
Twistair, thank you for helping out.

Cheers
Erik
 
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