Is selective felling possible in BC's coastal forests?
mhagen at mail.olympus.net
Fri Feb 6 12:06:30 EST 1998
Just consider it the equivalent of two double espressos, for each turn!
Really gets the crew on their toes, which is the only way to last very
long on an aerial show.
Having to punch the line ruins everyone's day. Some poor sucker has to
coil it and pack it out (over the F&B) to where the helicopter can pick
You got to love your work...
J. Fiske wrote:
> Good post Mike! Yeah, I remember how paranoid everyone was about static! I also
> remember seeing one lift where the pilot "punched in" the load and cable. WOW, what
> a show ... I was seriously glad I was not in the immediate vicinity!
> Mike Hagen wrote:
> > theo hopkins wrote:
> > >
> > > In article <6bb68a$o5q$1 at news1.tor.acc.ca>, Ross <dianaros at ican.net>
> > > writes
> > > >I was in West Yellowstone in 1990. At that time there was a helicopter
> > > >operation running next to where we camped. I watched this for a few days
> > > >and could only conclude that the contractor had to have a very large subsidy
> > > >or else the helicopter operator would never recover the cost of the
> > > >operation. It was however an interesting spectacle.
> > > >
> > > >
> > > I saw a figure in a US forestry magazine that MacBlo used 35 litres of
> > > fuel/cubic meter of wood carried to roadside with helicopter and 7
> > > litres/cu meter using conventional methods. In most countries, there is
> > > no tax on aviation fuel: if this is so in Canada, then that is part of
> > > the subsidy.
> > >
> > > (And the environment gives a subsidy as there are global warming
> > > externalities).
> > >
> > > Technical question again: is there a problem if selective logging by
> > > helicopter with trees to be lifted getting trapped by trees to rmain?
> > >
> > > Theo H
> > Yes, definitely! This is part of the high cost of helicopter logging.
> > Picture this: If the cutting pattern does not allow the bird to swing
> > the load in the direction of the landing, it has to rise vertically to
> > clear the residual timber, before it turns toward the landing. Takes
> > extra time which is directly related to how much clearing has been done.
> > External loads tend to rotate a bit so room is needed for that, plus
> > safety for wind blowing the helicopter offcenter. A good pilot will lay
> > the hook right into your hand but with a load on the line, they no
> > longer have that much finesse. For the ground crew, hazards include
> > flying limbs, static, logs bucked too heavy to lift, dropping the log,
> > dropping the cable AND the log(!), hangups (trees not completely bucked
> > free), etc. This is on top of the usual things that make a logger's life
> > entertaining. Maybe you see the picture. Those heli loggers are earning
> > that money! Tight openings in the canopy make life difficult.
> > Seeing a well planned helicopter sale is like watching the ballet. The
> > big lifter, probably a skycrane or chinook does its slow up and down
> > flight while the small bird (often a Hughes 500) dashes back and forth
> > to keep the chokersetters busy. Very cool. Very difficult to make a
> > profit on. Sometimes the only way to deal with a problem.
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