Re: [Flightgear-devel] terrain surface types...

2006-11-02 Thread Martin Spott
syd  sandy wrote:

 [...] ... it would look a bit silly on land , and 
 although it IS a seaplane , some (pilots) apparently take off from 
 runways ;) . And  I am adding retractable gear  , [...]

You know, some people do it the other way round. Just a reminder, I
guess this strip has already been mentioned elsewhere:

  http://foxtrot.mgras.net/bitmap/Wasserlandung_mit_Salto.mpeg

Martin.
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Re: [Flightgear-devel] terrain surface types...

2006-11-02 Thread Steve Hosgood
Martin Spott wrote:

You know, some people do it the other way round. Just a reminder, I
guess this strip has already been mentioned elsewhere:

  http://foxtrot.mgras.net/bitmap/Wasserlandung_mit_Salto.mpeg

   Martin.
  

That looks like a really expensive mistake!

Just for interest - I know nothing much about seaplanes. What did the 
pilot do wrong?

I'm guessing that the wheels should have been retracted really high (or 
inside the floats) and out of the way. Is that it?
Steve

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Re: [Flightgear-devel] terrain surface types...

2006-11-02 Thread Martin Spott
Steve Hosgood wrote:
 Martin Spott wrote:

 You know, some people do it the other way round. Just a reminder, I
 guess this strip has already been mentioned elsewhere:
 
   http://foxtrot.mgras.net/bitmap/Wasserlandung_mit_Salto.mpeg

 Just for interest - I know nothing much about seaplanes. What did the 
 pilot do wrong?
 
 I'm guessing that the wheels should have been retracted really high (or 
 inside the floats) and out of the way. Is that it?

Correct, the drag of these small wheels is enormous when they get into
water at this speed,

Martin.
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Re: [Flightgear-devel] terrain surface types...

2006-11-02 Thread Stuart Buchanan

--- Martin Spott wrote:
 Steve Hosgood wrote:
  Martin Spott wrote:
 
  You know, some people do it the other way round. Just a reminder, I
  guess this strip has already been mentioned elsewhere:
  
http://foxtrot.mgras.net/bitmap/Wasserlandung_mit_Salto.mpeg
 
  Just for interest - I know nothing much about seaplanes. What did the 
  pilot do wrong?
  
  I'm guessing that the wheels should have been retracted really high
 (or 
  inside the floats) and out of the way. Is that it?
 
 Correct, the drag of these small wheels is enormous when they get into
 water at this speed,
 
   Martin.

I'd always read how very bad it is to do a gear-down landing on water and
the likelihood of flipping over the nose, but to see a video of it is
something else...

Ironically, a wheels-up landing on land in an amphibian (or on straight
floats) is much less of an issue. 

Apparently when some Canadians take their float-planes out for the winter
they just land on grass by the side of a runway on their floats. Take-off
involved putting the plane on a truck and driving down the runway until
rotation speed is reached - there's a video of it somewhere...

-Stuart

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[Flightgear-devel] terrain surface types...

2006-07-20 Thread syd sandy
Hi all , is it possible to detect the type of surface one lands on, by 
surface type / land cover/ or texture ? In the process of trying to 
design a wake / spray for the Beaver  I would like to only show a 
spray if landing on water ... it would look a bit silly on land , and 
although it IS a seaplane , some (pilots) apparently take off from 
runways ;) . And  I am adding retractable gear  ,  but came across some 
interesting info while trying  to find out proper operation of the gear.
The gear apparently has very little shock absorption , very difficult to 
control/steer in a crosswind, brakes tend to fail easily  and very 
hazardous if accidentally left extended during a water landing . now 
if I can just accurately model all that !
Cheers ,
Syd

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