cruise speed only 140kts?

[rennman 4]

i could only get 140kts from her at 6000 ft with clear weather...how can 2 engines give less speed than a 182?

[ThomasAH 61]

Two horses do not run faster than one

 

Besides that, the cruise speed should be around 160kts.

Just checked one of my PFE logs, cruise speed was 157kts at 8000ft in mostly clear weather.

[Bert Pieke 7,585]

Gear up?

[ThomasAH 61]

I just tested it: Level flight at FL60, flaps and gear retracted, 33 gallons of fuel in both tanks, leaned for maximum performance, throttle at 100%:

Clear weather: 163 KIAS

Current weather in northern Germany (i.e. quite cold): 169 KIAS

 

Edit: And if I manually set the outside temperature at 6000ft to -40°C, it easily makes 182 KIAS ... don't try this at home

[rennman 4]

thanks for your research...i had a full load of fuel at the time...??

[ThomasAH 61]

Full tank is the default and I think should last 6h, but as most of my flights are 1-2h, I usually start with 50% fuel. The 337 flies much better this way

[scottb613 1,188]

Hi Folks,

 

Keep in mind 140 knots IAS at 6000 feet on a standard day is about 153 knots TAS - which may add some confusion for the OP...

 

Regards,

Scott