Propeller RPM Restrictions?

[Dave Baxter]

I have about 10 hrs on my SA-100 and several dozen landings. Am reasonably happy with the speeds rigging and control response. My question is this, My propeller is a metal Sensenish 74DM6-0-54 that came off a super cub with a similar engine, there was no paper work with it. I took it to our local prop shop and had them check it out, it tracked straight and seemed to balance statically. They said I did good. Now with some real time on the airplane and a more critical evaluation (No longer a death grip on the control stick) there seems to be a very subtle vibration between about 2200 and 2400 rpm. BTW it runs smooth at 2200 or below, or 2500 and above. My Starduster too also has a metal Sensenish that is a 76-56 and right on the prop has a sticker suggestion one not operate it in between 2250-2350 RPMs continuously?

What I am wondering is, if the same restriction apply to the smaller diameter Sensenish propellers? The Sensenish propeller web PDF calls for a static limit almost Identical to mine, but what I am unfamiliar with is this static number the same as in flight? If static is equal to cruise in the air this very well may be the case? But need someone smarter that me with some real hands on experience, to comment. Dave

http://www.sensenich.com/wp-content...luminum_Propeller_Applications_1349891787.pdf

Piper PA-18 Super Cub 150 Lycoming O-290-D2/ 135hp 74DM6-0-52 STD Prop 74DM6-0-54 Climb
restriction are 2100 to 2475

 

[EAABipe40FF]

 

[Kermit]

 

[Dana]

 

[TFF1]

 

[TFF1]

 

[will moffitt]

 

[TFF1]

 

[Dave Baxter]

 

[biplanebob]

 

[will moffitt]

 

[TFF1]

 

[chicoduster]