Pilottonny
Well Known Member
Hello,
I am at the stage that I need to order my prop to be able to carry on with the cowling. I was going to order the MT 2-blade hydraulic CS-prop (MTV-11-C/183-59), but found out today, that it has a restriction from 2050 RPM to 2300 RPM, above 22 MAP. The restriction means that the prop should not be operated within this RPM range continously. Running it within this range for a minute or so, is not a problem, just not run it continuous. BTW the MT-tech-rep explained to me that the blades will not fly-off on their own, but the problem is that if you do run the prop in this range, continuous, you will ruin the bearings and seals, in the long run.
I have not flown a CS-prop yet, but will you ever fly between 2050 and 2300 RPM, anyway?? What I mean is, is it a "restriction" at all, or is it just a minor issue.
I have a Dynon EMS-120 that allows to mark the restricted RPM-range yellow, on the RPM-guage. So it is not a question of forgetting about it and running the engine at the wrong RPM.
The alternative is the 3-bladed MTV-12-C/180-57, which is 8 lbs heavier and $1.460,- more expensive . Also it seams that a three blade prop causes more drag . On the other hand the 3-bladed should be more efficient in climb and is quieter and smoother than the 2-bladed .
Choices, choices !!
Anybody flying a CS-prop, please chime in and let us know: Do you ever fly in the 2050-2300 RPM range?
Regards, Tonny.
I am at the stage that I need to order my prop to be able to carry on with the cowling. I was going to order the MT 2-blade hydraulic CS-prop (MTV-11-C/183-59), but found out today, that it has a restriction from 2050 RPM to 2300 RPM, above 22 MAP. The restriction means that the prop should not be operated within this RPM range continously. Running it within this range for a minute or so, is not a problem, just not run it continuous. BTW the MT-tech-rep explained to me that the blades will not fly-off on their own, but the problem is that if you do run the prop in this range, continuous, you will ruin the bearings and seals, in the long run.
I have not flown a CS-prop yet, but will you ever fly between 2050 and 2300 RPM, anyway?? What I mean is, is it a "restriction" at all, or is it just a minor issue.
I have a Dynon EMS-120 that allows to mark the restricted RPM-range yellow, on the RPM-guage. So it is not a question of forgetting about it and running the engine at the wrong RPM.
The alternative is the 3-bladed MTV-12-C/180-57, which is 8 lbs heavier and $1.460,- more expensive . Also it seams that a three blade prop causes more drag . On the other hand the 3-bladed should be more efficient in climb and is quieter and smoother than the 2-bladed .
Choices, choices !!
Anybody flying a CS-prop, please chime in and let us know: Do you ever fly in the 2050-2300 RPM range?
Regards, Tonny.
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