Originally Posted by tomww
A wise choice I think.
Without getting into never ending hair splitting. I simply enjoy the climb I get from my MT prop on a 200HP RV7. Lots of climb and landing performance at a cost. My choice to go that way. Others like FP and thatís fine for them.
I donít find a penalty on speed or cruise.
Are you sure you need an MT12? Is there a smaller MT for up to 180HP?
Thanks for that info. Yes, this is the prop model that both Van's recommends for the RV-9A with 160 hp IO-320, and MT also lists the same prop for that engine on their website. My primary concerns, or apprehensions, are that we put an MT on the IO-360 powered Cozy MKIV my buddy and I built, and it had to go in for overhaul at about 100 hours due to loose blades. Now let me clarify this,,,, that prop was purchased new at least 10 years ago, so when it went to Tiffin Aire, they were able to warranty the hub/bearings and replaced them with something of a new beefier design. Blades were chewed up a bit so paid to have them fixed and repainted while they had it apart. Fast forward to a couple years ago and about 5 years of service on the overhauled prop, during a condition inspection at around 600 hours I found the blades were getting a lot of play,,,,,,Time for another overhaul but this time got at least got another 5 years and 500 hours on the prop. I don't know the model of this prop off hand other than its a 3 blade on a pusher. By now the blades were really chewed up and we had patched them up several times. Found a small patch were there was some de-lamination also. Back to Tiffin Aire and they did a fabulous job stripping the blades down and re-wrapping them and installing new nickel leading edges. Prop was like factory new when picked up. Again its an older prop model and on a pusher, so any prop on a pusher takes a beating from all kinds of FOD picked by the nose wheel and thrown through the prop no matter how careful you are. I am just thinking that I would rather spend a little bit more money for the MT with 2000 hour TBO as apposed to a slightly less expensive Whirl Wind with only 650 hour TBO.