Choosing Lean of Peak or Rich of Peak

Several of our owners still have questions about the operation of Lena Peak versus Rich Peak. Richa Peak has the advantages and you get the maximum speed, obviously, when you stay

rich

, when you are

rich

, it's a no-brainer in these airplanes, you just

lean

. until the hottest cylinders are about three hundred and eighty degrees Fahrenheit or a little less and that's where you are now, you can run it with the cow flaps wide open to let more air in,

lean

a little more aggressively, close them completely. I have to inject a little more fuel into the engine to compensate for the loss of airflow, but

peak

richness is something everyone has done forever and I mean it's a known quantity, what's important is 380 degrees Fahrenheit in the hottest cylinder and from time to time.

I'm thinking about it, the hottest cylinder in weather and cruising, sometimes our different cylinders, generally s

peak

ing the hottest cylinder and the climb is the hottest cylinder all the time and the customer is the same way and cruises , but they can be different and there are many people. You will see that the hottest cylinders are five and you wonder that because you know that five and six are in the front, six receive the greatest flow of cooling air and are the coldest, the problem with five is that yes, in the front, but it's behind that big Huge oil cooler that blocks some of the air, so you really have to be able to figure out which cylinder is the hottest on climb, which is the hottest on cruise, and before you take off, what I'm going to do it's just getting closer to the hottest cylinder on the engine analyzer, so I'm monitoring that particular cylinder, that's what I monitor on Klieman, I know all the others are cooler, that's good, it increases, it's the same way , I'll go to the hottest cylinder and navigate and that's what I'll base it on. my mixture settings and heater fin are now working Lena Peak, we still have some people that think Lena Peak is going to burn out the engine, that's old technology, that's something that went away with modern technology, all our guys. with twists in the mines, practically everyone flies on the Lena peak, so with careful eyes, the advantage is leaning on a peak, in addition to lower fuel consumption, there are fewer combustion byproducts there to clog the valves and the rings, the engine runs much cleaner.

The downside is that you lose a little bit of power with about two inches of manifold pressure, so your cruising speed will be five knots, maybe six, not slower than Peak Richa, but to give you an idea of ​​the cap we are flying with. Large tires flow less air through the engine due to resistance at 7,500 feet wide. It revs to 2500 rpm or 2450. You know, we're looking at a fuel flow of about 18 and a half gallons per hour, usually where the cow's flaps are half closed. a lot of gas with the same power setting at the same altitude.

Lena Peak runs at 12 and a half to 13 gallons per hour and cylinder head temperatures are typically cooler in that setting, so you know we're maybe going to give up five miles per hour. or five knots, but at the same time our fuel consumption is going to drop from eighteen and a half to twelve and a half, which is a huge drop now, of course, that it gives you a lot more range, which is why most people do it. does like this. Firewood. The spout is good The Lena spout is the same as the Richa spout and you are still looking at a maximum of 380 degrees Fahrenheit on the hottest cylinder.

Motors will vary a bit, but my normal power settings are, say, 22 inches and 2500, either down or up. altitude 7,500 feet, while the engines will vary a bit Lena's peak in fuel flows, they all seem to average about 13 gallons per hour, some of them to keep temperatures low or like twelve five, others are thirteen , two or three, but 13 is a good average number, so when I get to Lena's peak, I'll bring the mix back in pretty quickly because I don't want to be at peak for too long up to the base figure of 13 gallons per hour at 13 gallons per hour.

I make the adjustments I need to make to the cow hatch and then what do I do? I look at the hottest cylinder and if the hottest cylinder is 350, I know I can make it a little richer, get it a little closer to the peak, get a little more of that power loss back to work and my temps will still be fine, on the other hand , if I have 13 gallons per hour, my cylinder head temperature is 385 and I want to cool it down a little bit, it's just the opposite of the Richa peak if you want to cool it down.

If Lena catches up to you, you very gradually reduce the fuel flow, but it's very sensitive, so if I'm going to try to cool the engine down from 13 gallons per hour, I'll use maybe 2/10 of a gallon per hour. hour at 12 eight and then I'll see what the temperature is if I need to go a little more I'll go 12 6 or 7 but they are tenths of a gallon per hour on Lena peak settings and like I say 13 is a really good base figure the engine runs clean it runs strong no there is extra vibration Lena Peak is a winner in every way