O-320 max rpm's

taildragger1 · #1 03-28-2012, 06:07 AM

What size prop should i have on my RV-3? What should be my max rpm in flight and max static rpm?
Thanks,
Eric
N80wd

Sam Buchanan · #2 03-28-2012, 06:47 AM

Quote:

Originally Posted by taildragger1

What size prop should i have on my RV-3? What should be my max rpm in flight and max static rpm?
Thanks,
Eric
N80wd

The metal Sensenich is a nice prop. Details Here:

http://www.vansaircraft.com/cgi-bin/...oduct=sen-prop

The prop is limited to 2600 rpm but is very efficient.

PropMan · #3 03-28-2012, 08:55 AM

Eric,
A 68" x 70" is pretty common. BUT, it depends what you want-Cilmb/Race or Cruise. That determines the final numbers. Typical static is around 2400 and WOT is 2700. I do have customers that are comfortable with WOT of 2900-3000 or more (this can lead to less TBO though). Hope this helps

Sam Buchanan · #4 03-28-2012, 10:43 AM

Quote:

Originally Posted by PropMan

Eric,
A 68" x 70" is pretty common. BUT, it depends what you want-Cilmb/Race or Cruise. That determines the final numbers. Typical static is around 2400 and WOT is 2700. I do have customers that are comfortable with WOT of 2900-3000 or more (this can lead to less TBO though). Hope this helps

70" pitch? Vans recommendations for the O-320 in a RV-3 is 70" diameter and 81" pitch. I fly this prop on my O-320 RV-6 at 80" pitch; rotation at 2280rpm and I see 162 kts at the 2600rpm prop redline. The light RV-3 would really be a performer with this prop.

Frank, your props may be measured differently than the Sensenich but I didn't know there would be that much difference in the numbers.

PropMan · #5 03-28-2012, 11:36 AM

Yes Sam- Mine are measured differently. My O360 -6 has 65"x74" Three-blade and Static is 2400, WOT is 2700 at 210mph indicated at 3000'

Frank, your props may be measured differently than the Sensenich but I didn't know there would be that much difference in the numbers.[/quote]

Sam Buchanan · #6 03-28-2012, 05:30 PM

Quote:

Originally Posted by PropMan

Yes Sam- Mine are measured differently. My O360 -6 has 65"x74" Three-blade and Static is 2400, WOT is 2700 at 210mph indicated at 3000'

Ahhhh...three blade, ok, we are comparing apples to oranges.

taildragger1 · #7 04-01-2012, 02:13 PM

I pulled the spinner off the other day and found my prop to be a 67"dia x 68 pitch. I don't know who manufactured the prop, but it has over 30 laminates. I get 2400 static, which I think is a little high and my digital tach goes between 2760 and 2850 rpm in flight.

Mel · #8 04-01-2012, 02:48 PM

It is useless to compare pitch between different prop manufacturers. Especially wood.
Besides differences in measurement techniques, there are different airfoils and different plan-forms.

taildragger1 · #9 04-02-2012, 03:55 AM

Sam, what make prop do you have? I have a friend with an Ed Sterba on a RV-3 that is a 68" x 75 pitch.....but his O-320 has 175 hp. I wanted a Amur-Demuth, but mike Demuth passed away in Feburary, I hadn't called the shop to see if it is still open for business.

Eric Venissat
RV-3
N80WD

Sam Buchanan · #10 04-02-2012, 07:09 AM

Quote:

Originally Posted by taildragger1

Sam, what make prop do you have? I have a friend with an Ed Sterba on a RV-3 that is a 68" x 75 pitch.....but his O-320 has 175 hp. I wanted a Amur-Demuth, but mike Demuth passed away in Feburary, I hadn't called the shop to see if it is still open for business.

Eric Venissat
RV-3
N80WD

Have the metal Sensenich, 80" pitch per Vans recommendations. It is a cruise prop but my RV-6 (O-320, 160hp) still climbs nicely.