Ovation and altitudes above 15k

[NickG]

Took my O up to 16k on the way back from Amarillo last week. Wondering what sort of TAS everyone gets from say, 15k on up and FF (obviously WOT). Any info would be appreciated.

[MatthiasArnold]

Typically 158KTAS on 10.2gals/h, close to max gross with TKS FIKI and A/C induced drag penalties at F150 - F160. 

[JimK]

I just flew N436PS, a 2008 3GX Ovation from KMHK to KJWN a few weeks ago at 15K.  I was able to get slightly over 60% power (based on the 310hp tables), LOP, 13.5gph, WOT, 2,600RPM and 183kts TAS.

[buddy]

2005 O2 has everything but TKS. Flying at 15K, OAT -1, ROP, WOT, 2,400RPM. 
169 kts TAS

[Ragsf15e]

13 hours ago, buddy said:

2005 O2 has everything but TKS. Flying at 15K, OAT -1, ROP, WOT, 2,400RPM. 
169 kts TAS

What was your ff at that setting?

thanks,

drew

[buddy]

9 hours ago, Ragsf15e said:

What was your ff at that setting?

thanks,

drew

Sorry the screen shot was not clear but the FF was 11.6

[flyingscot]

Representative numbers at two power settings for 310 HP 2000 O2 w/TKS: 

15000’ WOT 2500 176 TAS 16.5 gph 59%

15000’ WOT 2400 170 TAS 13.9 gph 56%

 

[NickG]

WOT 14000 176KTAS 11.4GPH

[Ragsf15e]

It’s interesting that there’s quite a wide variation in seemingly similar power settings at the same altitude.

[NickG]

Main difference is how lean and what RPM. I cruise at 2550, others 2500 or 2400.

[hais]

On 11/6/2024 at 7:31 PM, NickG said:

WOT 14000 176KTAS 11.4GPH

Looking at your post-it makes me wish: wouldn't it be nice if the g3x had "power setting bugs"? 

[mike_elliott]

 

Personally, I like flying the O's under 12K, you really dont gain much higher up. Here is one burning a paultry 12.6 GPH bustin along at 179-180 TAS I flew from College Park to Fort Lauderdale a while back. Horsepower when flying LOP is determined by FF*13.9 in the higher compression non turbo's acc'd to Mike Busch, so if your a nerd for wanting a percent, you can build a chart.

ROP, all bets are off, just fly it 100 ROP from first cyl to peak, and you will keep the aluminum stout for more than a few flights.

[Jeff Uphoff]

I'm with @mike_elliott here. I've had my Ovation (originally Kerrville's first O2, now STC'd to an O3) ~2.5 years and 350+ hours now, and the only time I fly it over 11k is to top weather/bumps. It has a really great sweet spot flying WOT & LOP from 9-11k.

This was WOT at 11k last year turning either 2500 or 2550 RPM (I can't recall). 182KTAS on 11.9GPH at about 50 LOP.

[varlajo]

5 hours ago, hais said:

Looking at your post-it makes me wish: wouldn't it be nice if the g3x had "power setting bugs"? 

Sure does!!

 

 

[hais]

1 hour ago, varlajo said:

Sure does!!

 

 

Neat, thanks! have to go read the manuals again. 

[NewMoon]

On 11/4/2024 at 5:20 PM, JimK said:

I just flew N436PS, a 2008 3GX Ovation from KMHK to KJWN a few weeks ago at 15K.  I was able to get slightly over 60% power (based on the 310hp tables), LOP, 13.5gph, WOT, 2,600RPM and 183kts TAS.

That's pretty darn good

[NewMoon]

On 11/6/2024 at 7:56 AM, buddy said:

Sorry the screen shot was not clear but the FF was 11.6

Are you sure that is ROP? Seems low at WOT

[NewMoon]

On 11/7/2024 at 12:12 AM, Ragsf15e said:

It’s interesting that there’s quite a wide variation in seemingly similar power settings at the same altitude.

I agree, I see a guy at 15k showing 16.3"mp, I would be high 17's

[Max Clark]

On 11/9/2024 at 4:58 PM, varlajo said:

Sure does!!

 

 

Hard to read on my screen, what did you have printed here?

[varlajo]

41 minutes ago, Max Clark said:

Hard to read on my screen, what did you have printed here?

Ah, we were talking about the user-defined ticks on manifold pressure gauge. 

[Niko182]

On 11/9/2024 at 11:56 AM, mike_elliott said:

 

Personally, I like flying the O's under 12K, you really dont gain much higher up. Here is one burning a paultry 12.6 GPH bustin along at 179-180 TAS I flew from College Park to Fort Lauderdale a while back. Horsepower when flying LOP is determined by FF*13.9 in the higher compression non turbo's acc'd to Mike Busch, so if your a nerd for wanting a percent, you can build a chart.

ROP, all bets are off, just fly it 100 ROP from first cyl to peak, and you will keep the aluminum stout for more than a few flights.

I believe its 14.9 for the non-turbos, and 13.7 for the turbos.

On 11/6/2024 at 5:42 PM, FlyingScot said:

Representative numbers at two power settings for 310 HP 2000 O2 w/TKS: 

15000’ WOT 2500 176 TAS 16.5 gph 59%

15000’ WOT 2400 170 TAS 13.9 gph 56%

 

As an FYI, this is very ROP. Peak at 59% power is right around 12.2 GPH and 56% is 11.6GPH. You'd get some performance back running it a decent amount leaner and save some gas. If you want to keep running ROP, somewhere in between 12 and 13.5GPH would probably keep the engine a bit cleaner.

[Niko182]

This was my eagle at 16500. If I knew I was living in Colorado, I would’ve probably considered an acclaim, but this will have to do. I’d agree flying them over 12 doesn’t really get you anything except not hitting a mountain.

[mike_elliott]

20 minutes ago, Niko182 said:

 believe its 14.9 for the non-turbos, and 13.7 for the turbos.
 

I stand corrected…. That’s what I meant to say  thanks for fixing!

[Max Clark]

14 hours ago, varlajo said:

Ah, we were talking about the user-defined ticks on manifold pressure gauge. 

Meant the Vx, Vy, etc...

[varlajo]

2 hours ago, Max Clark said:

Meant the Vx, Vy, etc...

Vr, Vx, Vy, Va, Vbg, Vfe, Vle, and touchdown speeds with and without flaps at MGW -200 and -600 lbs.