MT 3 bladed prop

sloutitt · #1 03-14-10, 01:29 PM

I purchased a T337G with two MT props and like most aspects but have had to repair the rear blades twice and that is with no un paved strip exposure. Now at strange airports after a little cool down run I shut off the rear and just taxi with the front as I am perinoid about the damage potential.
Sandy Loutitt
N81C, 1973 T337G

sloutitt · #2 03-14-10, 01:31 PM

Opps, forgot to spell check that,
Sandy

hharney · #3 04-03-10, 09:31 PM

The damage issue to the rear can be annoying but it's not a real big deal to repair. I have found that leading with the rear is a must. On take off I lead with the rear and then bring the nose up a little before adding front power. This has all but eliminated any issues with the rear. If I have a long taxi on a hot day I will taxi with the front as primary but as long as you taxi with the rear and don't use the front to blow anything back to the rear you'll be fine. I have had some bad damage on the original rear prop also. So there is no cure for the potential issue, just live with the system. The only time I bring both engines to power at the same time would be taking off on a short field.

The MT props are fantastic

Learjetter · #4 05-15-20, 10:25 PM

For those of us with newer MT props, MT released SB 30 r4 a couple months ago. Applies to a small number of MTV 12 props & blades built or overhauled in 2013-2014 & requires replacing blade lag screws.

Here’s the whole list of MT service bulletins:

https://www.mt-propeller.com/en/entw/serviced.htm

The actual Service Bulletin mentioned above
https://www.mt-propeller.com/pdf/sbs/sb30r4.pdf

JAG · #5 08-10-20, 04:34 PM

Hi all,

Bumping an old thread here...

Just got word my front prop is a 'boat anchor' - too much corrosion to overhaul. I am faced with a decision - do I go with new McCauley's, or new MT's? Price is around the same (maybe a small advantage to MT) - but that is not the issue. I want to make the best choice for reliability, damage tolerance, performance and maintenance costs in the future.

Herb has posted some great feedback on the MT's and I am looking for some more views on propeller choices, and why you may choose one over the other.

Thanks in advance.

Jeff

Learjetter · #6 08-11-20, 09:30 AM

I like the MT props. But, I am a "concrete" flyer and not a bush pilot--My bird has only touched grass once since I've owned it--everything else has been nice, clean, smooth and long runways.

Consider TBO on the MTV-12D's (2000hr/72 mo, per SB1R5) vs your two-blade.

Mine were installed in 2014, have about 400 hours on them. Mine are "due overhaul" this year, and have an issue with the wrong lag screw installed at manufacture. SB (see prior post) says I must change out offending lag screw at overhaul. MT Props rep highly recommended accomplishing overhaul on time, and taking care of the lag screw issue. I go into annual this winter, so I'll go ahead and get 'em done then.

Got a quote from a "local" MT props shop in Tulsa: approx $8K for both. And, they said they'd come get them and bring them back to me in about 10 days time (I'm a few hours drive from Tulsa). Not too bad, if you compare to Herb's quote in his post from a few years ago.

There seem to be quite a few shops ready to service your MT Props, should you need it.
https://www.mt-propeller.com/en/entw/services_usa.htm

PS: I think you can still get white with red tips like Herb's, or black with white tips like mine.

Kim Geyer · #7 08-11-20, 12:24 PM

The McCauleys are also 72 mo and 2000 hr if the model number has a B at the end. You can also have a mod/ SB done at overhaul that will increase it to 2000 hrs.

DrDave · #8 08-12-20, 07:44 PM

Quote:

Originally Posted by JAG

Hi all,

Bumping an old thread here...

Just got word my front prop is a 'boat anchor' - too much corrosion to overhaul. I am faced with a decision - do I go with new McCauley's, or new MT's? Price is around the same (maybe a small advantage to MT) - but that is not the issue. I want to make the best choice for reliability, damage tolerance, performance and maintenance costs in the future.

Herb has posted some great feedback on the MT's and I am looking for some more views on propeller choices, and why you may choose one over the other.

Thanks in advance.

Jeff

I have a spare front prop and hub with log book that would bolt right on. Part Number: D2AF34C59-AMP. Looks like 250 hours since disassemble, service, assemble, check track, set angles, balance-complete reseal.

Dave

JAG · #9 08-13-20, 11:37 AM

Dr. Dave - you have my attention...Potentially a much faster way to get back into the air. MT prop lead times are 8 to 10 weeks!

PM or call me; we can discuss a price.

I still have a decision to make though... the front prop that was removed did not have many hours since overhaul, but a few years for sure. The rear prop has way more hours and years on the aircraft, so based on the reason the front got rejected at overhaul, I am guessing the rear is in the same condition and will be scrap at next overhaul as well. The issue is internal corrosion on hub and on blade roots inside hub. This is due to an aircraft that was sitting and not utilized AND being in south Texas in the humid environment. I had to remove the front prop due to an oil leak, but I am pretty confident that the rear prop is not much further behind in giving me problems. These old props are not supported with parts anymore, and McCauley is pushing the current ones.

I believe it's a case of deciding "when" I buy new props, not "if".

Jeff