The International Cessna^® 170 Association

Good idea George, but I'm gonna have to wait until I retire, then I might don a blue vest, happy face badge, name badge( Hey You) and get paid to give bad advice at Wallyworld

BL and I are now using SuperSuper123 oil in and on anything mechanical on George's recommendation, blessed by TC Downey since he hasn't commented negatively on it despite having 8 hours to do so. And to cap it off Jim Mc plans on spending his retirement fighting corrosion with it's recommendation. What more does one need to switch.

PS rumor has it it is a base stock in MMO.

As A lllooonnnggg time pilot and airplane mechanic, my advice is to use the good old 123 brand oil, jab the beast in the butt, and hang on! When the oil temperature subsides, throttle back and land. Keep an accurate log.

Okay maybe a brain lapse on my part and I just need to be steered a bit.....

Been trying to read the performance charts for the Continentals found in the member section but can't wrap my head around those charts.

Am trying to determine RPM for 65% and 75% power at various altitudes.

First I calculate that 65% of 145 hp is about 95 hp. I don't have a MP gauge but using 24HG shows a RPM of 2200.
The 75% of 145 hp is about 110 hp which works out on the chart to about the 2450 RPM.

Then these need to be modified for altitude and that's where I'm getiitng lost.....

Any better chart or way to calculate?

Any rules of thumb?

Someone got a better explain action?

blueldr wrote:As A lllooonnnggg time pilot and airplane mechanic, my advice is to use the good old 123 brand oil, jab the beast in the butt, and hang on! When the oil temperature subsides, throttle back and land. Keep an accurate log.

What would you include in the "accurate log"?

I emailed you the info from the performance section of the OM which indicates that at 2500 ASL 77% power is 2600 RPM.

I recommend that with the C145/O300 you run it at full throttle for the first hour and up to 5 hours if necessary until the CHT indicates a drop and/or the oil consumption indicates break-in has been achieved. It's unlikely you'll need more than 5 hours, and don't be concerned about full throttle operation in this situation. (Remember, 2600 with the standard prop is about all that full throttle achieves, anyway.)

Yep!!! Every thing that Gary said . Fly it if you had stole it . I was taught that 46 years ago and have run in many engines that way and so far only one has let me down . I still blame Lycoming for that but that's another story .