ElpinDAB From United States of America, joined Apr 2005, 458 posts, RR: 5 Posted (6 years 6 months 6 days 9 hours ago) and read 4011 times:
Hey
I remember back when I got my seaplane rating, one of the most interesting things is that the second the engine turns over after you start it, you are moving along the water, even at idle power. Because of that, I've always wondered what the procedure is to start a multi engine seaplane. Does it have to be done on land, or can it be accomplished in the water also without undesirable results? (I guess I can't really think of any multi engine seaplanes that aren't amphibs...)
WrenchBender From Canada, joined Feb 2004, 1779 posts, RR: 9 Reply 1, posted (6 years 6 months 6 days 8 hours ago) and read 3994 times:
The Twotter with the 12000 series floats is not an amphib, but part of the conversion was rigging the props with 'zero thrust latches' and setting up the throttles for that setting.
Therefore when you start, the props do not generate any thrust. The downside is they take forever to coast down on shutdown.
Notice that the props are at a 'flat setting'.
SlamClick From United States of America, joined Nov 2003, 10062 posts, RR: 71 Reply 2, posted (6 years 6 months 6 days 8 hours ago) and read 3989 times:
I've pondered the same problem with a helicopter on floats.
The old problem of Newton's 3rd law and the tail rotor not yet developing enough thrust to counteract the torque on the main rotor as it winds up or down.
Happiness is not seeing another trite Ste. Maarten photo all week long.
113312 From United States of America, joined Apr 2005, 536 posts, RR: 1 Reply 3, posted (6 years 6 months 5 days 23 hours ago) and read 3921 times:
I remember spending hours watching Grumman Gooses operating from a floating dock at Catalina Island during the 1960's. Since the boarding door was on the left side, they started the right engine first and allowed the plane to move forward until it was clear of the dock and personnel. Then they started the left engine.
BAe146QT From United Kingdom, joined Sep 2006, 996 posts, RR: 0 Reply 4, posted (6 years 6 months 5 days 23 hours ago) and read 3907 times:
Quoting 113313: Since the boarding door was on the left side, they started the right engine first and allowed the plane to move forward until it was clear of the dock and personnel.
I'm trying to picture this. The asymmetric thrust from the right motor would tend to push it into the dock, I should think.
A quick peek at some pics seems to show that the Goose does not have little water rudders, (a-la the Cessna amphibious Caravan), and I can't imagine that the control surfaces have any sort of authority at low speed, any more than they would on any other aircraft.
Or did the floating dock come from *behind* the aircraft and stop at the door, IYSWIM? Bogus ASCII graphic below;
[] + <- Airplane here, facing up the page.
[]
[]
[]
This would mean it could move left as much as it wanted, I guess.
DC8FriendShip From United States of America, joined Apr 2005, 242 posts, RR: 3 Reply 5, posted (6 years 6 months 4 days 11 hours ago) and read 3760 times:
The other method is you could start the engines with props in feather ala PT-6's and move the props out of feather when it's time to move the plane.
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