Climbing Speed

[calnaction]

Hi everyone,
I just started flying the DH8C again and I love it! I ahve one question though. Can anyone provide me some idea of a climbing speed schedule? i.e. 160 below 10,000, 170 to 14000, 180 to 20,000, etc This is important as I get to higher altitudes on longer flights to avoid too much drag as AOA increases. Thanks!

-Cal

[dash8311]

Hi Cal,

Welcome to the Fanda Forums.

Climb speed from ground level to 6000 feet is 165 knots. Above that, you can use 175, or 190 - usually a combination of the both.

Cheers,


Kris

[Dan CYKA]

So Kris, ask your papa this one.
When I was riding 3rd they pretty much climbed the whole thing at about 210 knots

[SAC002]

When i was in the SIM, they were climbing at 165...so go figure...<G>

[dash8311]

Apparently my number was off a little, it would be 165 from Sea Level to 17 000 feet (Type II climb), then slowly increases a knot or two per thousand feet. What they usually do after 17k is switch to pitch mode, and the IAS will start to creep back, being within the climb chart to ±2 knots. The high speed Type II is 195 to 10 000 feet, then again, starts to slowly increase (in speed) to keep a constant rate. Of course you could climb with a Type III climb profile, which is 135 knots (Vx, kind of), but they don't do these very often.

Climb at 165.

Hope these help,

Kris

[nicogi]

Chris is right. 165 KIAS is THE typical climbing speed for the Dash 8, and that's apparently what Jazz pilots use nearly all the time (best combination of distance and climb). The slower Type III profile (135 KIAS) would be used when weather, nearby mountains or dense traffic are factors. As far as the faster Type I goes (195 KIAS), I honestly have no clue as to when it would be used. I've tried it and it takes forever to climb.

[SAC002]

195 is used when you have passengers on board who are scared of heights...

[nicogi]

Haha! Great one Dan. It's either that or when pilots are asked by the ATC to mow the lawn at the end of the runway.

[calnaction]

Hey guys,
Thanks for the help! Sorry to not get back for a while but I'm in finals and working hard. Anyone happen to know what power settings are used for climb? I try to be a \"by the books\" pilot and I know that the manual lists the max torque settings for 1050 and 900rpm. Just curious what Jazz pilots and the like use.

-Cal

[dash8311]

As per the Jazz climb you mentioned, they have it at 900 (quiet), and 93% torque or so. At times they climb at 1050, but only for clearing things in the way .


Kris

[Thomas Herger]

Hi Gentlemen!

I would like to answer the question regarding climb speed.

The AFM of the Dash 8 differentiates between 3 types of climb.

Type one: Highspeed with 195 kts. This one will be used if a flight is behind schedule. It results in a higher speed at low flight altitudes. Starting at FL 120 the pilots would have to reduce speed gradually to 163 at FL 180, above the same speed schedule as for Type 2 applies. With this climb you can make up 4-5 minutes on a flight.

Type two: 165 kts will be kept until FL 180. Here speed is gradually reduced in steps until reaching FL 250, where you would only have 135 kts. This reduction above FL 180 is necessary as the perfomance of the aircraft drops significantly and the aircraft would not climb any more with 165 kts at higher weights. Remeber that according to the Climb power table the torqe has to be reduced above FL 120 at normal OAS. This causes a poor climb rate at higher altitude.

Type 2 climb is the normal climb schedule for the Dash 8 and most oeprators use it.

Type three: The low speed climb is flown with a speed of 135 kts up to FL 250. This gives you a great climb speed an angle, however, results in a high pitch which normally makes a in flight service of the cabin attendants a challange. Hence, it is only used for terrain/weather clearance.

Climb is normally flown with 1050 or 900rpm. 1050 gives you a better climb rate, but also more noise.

The manuals give you tables for Type 1-3 Climb and with either 900 or 1050 rpm. However, this does not mean that you have to stick to those tables. You can always fly it like a cessna, its just that you don´t have any performance tables when deviating from the stated procedures. Especially in turbulence we use to climb in pitch mode (5°) to avoid pitch oscillations with IAS mode, and the speed is up to the weather.

I hope that helps. Greetings to all fans of our product.

Fly safely!

Regards, Capt. Thomas Herger

[Kenrich890]

During Climbs do you have to reduce engine power in term of torque % the higher you go. If so can you give me the diferent power management with the power level and pops for different altitudes. I normally on flight sim take off at full power and full prob with auto feather on and fuel pumps and TOP then when i get to a 1000 feet i switch to MCl then i take off auto feather and the pumps. then i reduce engine to 80% torque and props to 1050rpm. and climb like that until i reach select alt. Also what is the climbs alt in terms of feet per min i usually climb at 1500 fpm. Looking forward to hear from someone to tell me if my operation are right.