DH6 quick response emergency checklist

[Slipster]

Anyone know where to find one online?

[pushyboss]

"Max Power, Flaps 10, Speed 80, Confirm autofeather."

Pretty much sums it up.

[rightseatwonder]

You flew a twotter with autofeather??!?!

sweet!

[Rowdy]

I'm pretty sure all of Boreks 300's have autofeather... It's a requirement for MPS is it not JC?

[Lost Lake]

"Max Power, Flaps 10, Speed 80, Confirm autofeather."

Pretty much sums it up.

Hmm, pushyboss, which twin otter has a Vyse of 80? 100/200 series is 83, 300 series is 87. The call is: max power, flaps 10, Vyse (83/87), flaps up. If you don't know the numbers or the proper calls, don't say anything'

Hey JC, I almost know something about em now!!.

[bezerker]

Stolen from other sources:

The colour code markings on the Standard Series 300 airspeed indicator (aircraft without S.O.O. 6093 or S.O.O. 6120) are painted at the CAS number, not the IAS number. It makes no sense, but it was the way things were done under the CAR 3 certification rules that applied to the legacy aircraft. Thus, if you want to obtain Vyse (82 knots CAS), you have to put the needle over the 80 knot IAS position, not over top of the blueline.

Under all conditions, without any exception, you want to use 10° of flap and target 80 KIAS for the initial climb to 400 feet (or higher if required for obstacle clearance) prior to flap retraction. There is no value, none whatsoever, in using a higher initial climb speed. The best rate of climb for the aircraft is 80 KIAS when the wing is in the flap 10° configuration. That is true regardless of whether you have two engines operating, one engine operating, or whether your Twin Otter is being towed on a rope like a glider.

By targeting and maintaining 80 KIAS after takeoff, you put the greatest distance between yourself and the ground in both the shortest period of time and the shortest horizontal distance covered. That is the universally accepted objective for twin engine operational practice following takeoff - just watch any Boeing or Airbus twin depart from your local big airport, and see if they choose best rate of climb as V2, or if they elect to lower the nose and go faster. They all put the nose way up there and go for the Vy that applies to their departure configuration.

There is no benefit of any kind in flying faster than 80 KIAS immediately after takeoff in a Twin Otter. If an engine fails, you want height above ground (potential energy) in your back pocket, not excessive airspeed (kinetic energy). Excess height above ground keeps you alive, excess speed simply creates a bigger crater when the aircraft hits the ground.

If an engine does fail, all you have to do to maintain the 80 KIAS that you had a few moments ago with two engines operating is to lower the nose of the aircraft to half the pitch angle you were using when you had two engines operating. In other words, if your initial pitch angle was +10° to maintain 80 KIAS with two engines, you stuff the nose down to +5° pitch angle when you lose one engine, and you will then continue to maintain 80 KIAS. Half the engines? Use half the pitch angle, it's simple.

Takeoff with flaps 10° (and full calculated takeoff power, by the way - there aren't any Luddites still out there who are using 90% power for takeoff, are there?), rotate to a pitch attitude that will give you 80 KIAS, maintain that speed until no less than 400 feet before you begin to retract the flaps, let the flaps retract fully before you make any power adjustment (the aircraft subsides a bit during flap retraction), transition to 100 KIAS during the flap retraction, and you will enjoy a long, safe, happy life flying Twin Otters.

[Rudy]

....you put the greatest distance between yourself and the ground in both the shortest period of time and the shortest horizontal distance covered.

Whoa. So what exactly is Vx again?

[MUSKEG]

Balls in your court Lost Lake. Max pwr flaps 10 A/S 80 confirm autofeather, when safe checklist. Period.

[bezerker]

Rudy, you better go research V2 before commenting.

[Slipster]

To be more specific, does anyone have a pdf or a link to the memory items for 100/ 200/ or 300 serries. Just looking to get sharp before the ground school. I have the listed limitations and just want to memorise the ... "engine fire left side on the ground" Power idle prop feather fuel off set parking brake etc... It would be apreciated.

[Cat Driver]

Slipster, I always found that it was best to not do anything in the " quick response " mode when driving flying machines.

[Rudy]

Rudy, you better go research V2 before commenting.

300?

[Rudy]

k, I'm done. Nasty looking things.

[JerryRig]

You flew a twotter with autofeather??!?!

It's called Otterfeather!

[nortont]

Anyone know where to find one online?

To answer the original question, I don't think it exists on-line. I've looked before and come up empty.

[Lost Lake]

Balls in your court Lost Lake. Max pwr flaps 10 A/S 80 confirm autofeather, when safe checklist. Period.

Hmm. my sop's call for different numbers. We also don't have otterfeather. So the correct answer is: Fly the numbers and calls as determined by you SOP"s! Can't get simpler than that.
Back to you!

[pushyboss]

Lost Lake,

I have over 5,000 hours of DHC-6 PIC time. Instructed on the DHC-6 at Flight Safety inToronto. Flown them all over the world on straight skiis, wheel skiis, CAP and Wip floats (straight and amphib) oh and of course wheels. I almost forgot about the several transatlantic ferry flights I did as well. So.....if you want to get all smarmy about the calls at least get it right and don't bring a knife to a gun fight. I would explain further but the explanation regarding the 80 kts was given in an earlier post.

I repeat "Max Power, flaps 10, speed 80 confirm autofeather".

[Lost Lake]

Lost Lake,

I have over 5,000 hours of DHC-6 PIC time. Instructed on the DHC-6 at Flight Safety inToronto. Flown them all over the world on straight skiis, wheel skiis, CAP and Wip floats (straight and amphib) oh and of course wheels. I almost forgot about the several transatlantic ferry flights I did as well. So.....if you want to get all smarmy about the calls at least get it right and don't bring a knife to a gun fight. I would explain further but the explanation regarding the 80 kts was given in an earlier post.

I repeat "Max Power, flaps 10, speed 80 confirm autofeather".

Congradulations on your otter time pushyboss. Like I said, my sop's are different, and I don't have autofeather. Can't confirm autofeather if there isn't any. OOps, sorry I'm on floats, but still, our emergency check list is: Vyse on the 200 series is 80 kts flaps 0, wheels, skis or floats., the 300 is 80 on wheels, 87, flaps 10 on floats. Like I said, follow the SOP'S.

The original post was about emergency check lists. Hope you don't make the same engine call for a generator failure!

Now you've confused the poor fellow looking for info.

[Cat Driver]

What is this " call " thing you guys speak of ?

Do you need a satellite phone to make it if you are way up north?

[CLguy]

Slipster the engine fire drill on the ground is exactly the same as in the air, except you are shutting down both engines rather than just one. The drill is printed on an really nice brass tag between the fire T handles so you really don't have to memorize it, rather just read it as you are calling out the drill.

We use 86kts for single engine go-no-go speed and also have no autofeather so no sense calling comfirmed engine is feathered. Better be calling Power Lever Idle, Prop Lever Feather on the dead engine before trying to get to 400 feet.

[Cat Driver]

How long will it take too climb to 400 feet if you lose an engine just after lift off and feather it in a Twin Otter series 100 on floats?

[Cloudhumper]

How long will it take too climb to 400 feet if you lose an engine just after lift off and feather it in a Twin Otter series 100 on floats?

On a hot day at gross? Pack a lunch...

[Cat Driver]

The best I could get in a fully loaded 100 series on floats with one feathered was about 200 feet per minute down as I recall.

[Lost Lake]

How long will it take too climb to 400 feet if you lose an engine just after lift off and feather it in a Twin Otter series 100 on floats?

Yer datin yerself Cat, didn't know there were any(many)100's left on floats Hope to see one in a museum one day. Maybe you'll be there to show it to me..

Just kiddin

[Cat Driver]

I think there are still some 100's on floats running around out here on the west coast flying the same routes as when I flew them...yeh, come to think of it that was some time ago.