Just wanted to gather some thoughts on what climb profiles you guys adopt for reasonable fuel use?

 

Have done some light reading and it seems hitting something around 1200 - 1500 ft up to around FL300, reducing to about 400 ft above FL300 seems reasonably accurate. I manually adjust VS in order for the Phenom to behave a bit more like the real Phenom with FLC, since we actually have an autothrottle in the Carenado version, which would adjust throttle position erroneously.

 

I have now flown a handful of flights and this is my standard operating procedure (this is assuming a cruise level of around FL350 to FL410):

 

1. Fuel at 417 gallons and pilot + 2 PAX + 100 lb cargo. If you don't set 417 gallons, your Fuel stats page will be off (or you can just mentally subtract the 417 - initial fuel gallons from the indicated fuel reserve).
2. Set TOGO (about 88% N1), rotate and keep at 9.5 degrees on takeoff
3. At positive rate, reduce to CON/CLMB (about 86% N1)
4. Accelerate to 200 knots, set altitude to cruise level and VS at 2,400 ft/min using AP (this roughly maintains 200 KIAS)
5. Adjust VS to maintain 200 knots, where you start to drop to about 1,200 ft/min, throttle up to TOGO to maintain 200 knots and at least 1,200 ft/min VS.
6. At around FL180, adjust to around 91% N1 (about the end of the green band for N1), let the Phenom accelerate whilst maintaining current VS as by now you'll drop to around 180 KIAS trying to maintain 1,000 ft/min climb.
7. Adjust VS to maintain 180-200 knots, depending on cruise level. At FL280 or where VS drops to 1,000 ft/min increase thrust up to MAX (around 95% N1), set VS to get up to and maintain Mach 0.55 to ESA.
8. Throttle back to maintain Mach 0.55 at ESA.
9. Depending on what sort of fuel economy vs flight time I adopt, fly 160 KIAS to 180 KIAS at cruise (generally keep around Mach 0.55 cruise).

In summary, try and maintain 200 knots all the way to Mach 0.55, adjusting VS and throttle (although I prefer to adjust VS until it goes down to about 1,000 ft/min to 1,200 ft/min before I start adjusting throttle, as increasing throttle at lower altitudes really increases the fuel use.

 

Following the above, usually get a climb to cruise of about 25 - 35 minutes and about 30% fuel (about 125 gallons of fuel) used up during the climb. For example, latest flight from 500 ft AGL to FL370, took about 28 minutes and used up 28% fuel.

 

Does anybody have any suggestions/comments or more optimal settings?

 

I did try climbing at or near CON/CLB settings but once you get into the flight levels you really struggle to maintain at least 160 KIAS with any decent VS. Took me I think about 1 hour 15 minutes to climb to FL390 using minimum throttle (only about 22% though).

 

I know it's a bit more effort to adjust VS manually but really, once you're on AP adjusting the VS wheel every few minutes hardly taxes the pilot that much.

 

I think I'm going to test out a ~1,400 NM flight to see if the 1,500 NM range is accurately reflected in the Carenado Embraer Phenom 100.

Nice!, I too did many tests to see which is the most accurate way to climb and I found that forgetting "throttle detents" (wich actually doesn't work as it should), and just setting the speed on 200KIAS with the autothrottle after takeoff and just manually operate the VS, after take off it reaches easily 200 KIAS climbing at 2,500ft/min at 85% N1 aprox, it can continue this configuration all the way up to 10,000ft, then I slow down to 2,000ft/min, sometimes (depending on the winds and weight) it could be going from 90-100% N1, for some minutes, but is not that bad, and finally all the way up from FL300 to FL400, I reduce VS to 500 or 800ft/min it goes some where near to 82-87% N1, and then, since Carenado doesn't simulate selecting the mach speed, I manually adjust it, to mantain Mach 0.61, which is the real cruise speed, it's around 185 KIAS at FL400 and it burns a very low quantity of fuel, but the winds an weight depends too much!!!, since is a small aircraft not so much powerful (small engines), winds and weight is very important...

it climbs pretty well doing it like this...the longest flight I did was 950nm, will test a longer one soon, but it need a quick patch to solve the fps issue...sometimes is just a pain to fly it...

 

The question I have is the descend...I've seen in some videos it descend at even 250KIAS!, but the FLC mode works...if I select 250KIAS for descend is burning too much fuel for nothing, I'll see what I can do...normally I just left the 200KIAS and it's fine, but I'm not sure if this is correct, decelerate the aircraft reduces the speed too much, so that's not correct

Thanks for your input jjmp.

 

 

Yes descent I do maintain 250 knots and about 1800 ft/min as that generally coincides with the typical vectors you get with FSX or P3D. 200 knots up near the flight levels might be a bit slow for other airliners traffic. Below 10,000 I start to throttle back to 160 knots, keep 120 on approach and 100 knots on final approach once established.

 

Bernt Stolle recommended (thanks buddy!) setting max crz all the way up to cruising altitude so I might try that and see how the fuel consumption goes.

 

 

I did also find a nice pdf discussing climbing in the Phenom as well:

 

http://www.google.com.au/url?sa=t&rct=j&q=phenom%20100%20fuel%20burn&source=web&cd=6&sqi=2&ved=0CEQQFjAF&url=http%3A%2F%2Fwww.phenom.aero%2Fresources%2Flibrary%2FPhenom100_optimizing_speed_range_cost.pdf&ei=DctVU7T0FMiDlQWn6IDgBg&usg=AFQjCNF8tRnCQArBUCTFhSLtfd96nGGfXQ&bvm=bv.65177938,d.dGI

 

If that link doesn't work search in Google for Phenom 100: optimising speed, range and cost.

 

Regarding the throttle detents, they are not actual physical detents except for pushing past Max cruise setting in the real plane. They are just painted and you move the throttle to match the position.

 

I believe Carenado set the throttle so that the N1 roughly corresponds to the correct detent/throttle indication.

Yeah, I'll do that for descent and thanks for the link, I'll see it!

 

For the throttle detents, yeah I mean they're painted, but they quite don't match to the real power I guess?