I am in an active search for a Cirrus 20 or 22. I am curious as to the average cruising TAS of the SR 20, lean of peak at mid altitudes and expected RPM (since the propeller rpm is set automatically). Also, what fuel flow should I expect? Thanks
I fly a SR20. I generally get about 145 kts at 8.9 gph. I set power to 70% and then lean to what works out to be about 65%.
Welcome Thomas.
That depends on generation and engine. The Lycoming 4 cylinder G6 e.g. gives you a ROP target fuel flow in Garmin Perspective of about 12 gph for 145ish TAS. The Continental 6 cylinder is flown LOP usually, at cruise altitude you get the same TAS with around 9.2 gph. That’s why we own a G2 with the IO360ES
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I see 135kt TAS at ~9gph and 2600RPM.
ROP, I’d see an additional 10kt.
Disclaimer: I currently have half a nose wheel pant, so that’s knocking a couple of knots of my values for sure.
Sign up to COPA, much more information available beyond the Guest Discussion - you will get your $$$ worth for sure!
That’s 10k faster than the other guy posted. What year model and engine do you have…Thanks for the info…TC
Same.
By the way, I have had both a 2 blade and 3 blade hartzell and have noticed no difference in cruise speed.
Thank you sir.
Thanks for the POH. So, the SR20 has an automatically controlled prop pitch, whereas the SR22 has a pilot controllable constant speed prop. Is that correct. I’d love to have a link to a SR22 POH.
I fly a 2023 SR20 G6. I cruise at 75% power which is about 2600 RPM. LOP I run around 11.5 gph and a cruise speed of about 145 to 150. SR20 is a great plane! I’ll be upgrading to a 22T this summer, main reason is flying to Truckee in the summer which the SR20 can really struggle if it’s hot at altitude. I’ll second (or 5th) the suggestion to join COPA. As a new pilot I learn a ton for this forum.
Thomas, if you go further in your pursuit of purchasing a Cirrus, becoming a COPA member will give you access to a lot more information and, in particular, eyeballs responding to your posts, as many members don’t even bother to read this Guest forum. See this post:
If you are high enough to not risk excessive ICPs, you can fly peak EGT. Another couple of knots.
Recent flight:
No, you can get that as an STC for some SR22’s (maybe the G2 and the G3?) I’ve flown a G3 with that STC, unsure if they offer that for G5 and newer. But usually the SR22 is controlled just like the SR20. Throttle and mixture.
So what approx would a SR22 cruise rpm be at 65% LOP at say 8,000ft? anything over 2400rpm would be noisy would it not?
In a SR22, cruise is 2500 RPM, and at 8,000 feet nothing is noisy (or did you mean in the cockpit?). On takeoff in legacy SR22s, RPM is 2700 and that is noisy (the prop tips are supersonic) so SOP in noise-impacted areas is to pull back to 2500 RPM right after takeoff.
Max that fuel flow isn’t LOP for an SR20 with the Lycoming 4 cylinder. It looks like you fly target fuel flow which is ROP. You adjust to the target fuel flow line that appears once you go to 75% power and below?
2023 SR20 — Lycoming. 75% power at 5,000 - 9,000 is 150 KIAS at 12.5 gph +/-. I pull the mixture to the target line on the MFD; let the engine settle for a minute or two; then fine turn the mixture to 1440 EGT.
2006 G2
141-147 based on altitude LOP. 145 around 7000-8000 where majority of my flights happen. I run 2600 RPM mostly and even 2700 RPM if I am high enough.
At 3000 for short hops it’s much slower around 137ish. I keep mine polished and it does make a difference.