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HomeAircraftHelicopterAerial Photography and Video › first crash with camera...
11-06-2004 03:10 PM  13 years agoPost 21
Torsten

rrKey Veteran

Germany

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hey,

the site i linked is down. as well as the pic. to bad.

i wonder why ? no secrets there really just good information.

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11-06-2004 05:46 PM  13 years agoPost 22
CoastalTom

rrVeteran

Foley, AL (7 miles N of Gulf Shores/Orange Beach)

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DANNO,

Many times I find myself having to fly in tight spaces to get the right shot. You may be bounded by power lines, buildings, roads etc. that prevent a forward speed approach to landings or takeoffs. Straight up and straight down is many times the case.

The downwash can absolutely get you in those cases. I use the method I believe Torsten described. Come down slowly a few feet at a time. Sometimes just sliding the heli a couple of feet sideways or back or forth is enough to get the blades to "bite" again. You can certainly hear it when it happens.

Good luck!

Tom

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11-06-2004 06:25 PM  13 years agoPost 23
daggit

rrElite Veteran

Claremont, MN

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I second what Tom says. Circuits are not always and option.

Besides that, the camera person often gets some very nice shots on a slow descent

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11-09-2004 01:12 AM  13 years agoPost 24
tech1

rrVeteran

Mississauga

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Don't know if I have experienced the same thing. Sometimes in a hover to take a shot the blades get really loud and my control gets sloppy. This is usualy when I am trying to hold a steady hover so there is probably a slow decent involved.

To get out it takes a fair amount of collective or just a touch of forward. I have assumed I am hovering in or near my own dirty air but it has never affected me enough to cause concern.

I have not loaded my heli to the point where there is little performance left to fly on.(yet) This is not a boast, I have simply been lucky enough that my rig came out light wilth what I consider minimal affect onmy flight envelope. This may change someday so it is good to be prepared.

How is the loading on your camera ships?
Are you just capable of moderate climb and decent? or do you have power and pitch to spare when flying the camera ?

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11-09-2004 03:43 AM  13 years agoPost 25
DANNO

rrKey Veteran

St. Petersburg, Florida

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depending on if i use a 8 cell or 10 cell pack ive got just barely enough power to climb slowly....i usually dont use the 8 cell anymore though

www.skypiximaging.com

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11-09-2004 01:50 PM  13 years agoPost 26
gordonre

rrApprentice

Ireland

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I too have been caught out with the vortex ring state, especially when flying down-wind and trying to slow rapidly. On a fast vertical decent I have bounced my Robbe Moskito off the ground a few times (Not done this with the Vario Benzin though!). Thankfully none of the above incidents resulted in an accident, but were very close though!

There is an excellent book called "Fatal Traps For Helicopter Pilots" This book has given me a very good understanding of helicopter flight, and pitfalls to avoid. It was written for the full-scale models, but many of the principles can be applied to our models too. In particular the vortex ring state when flying near trees and buildings.

There are a number of case studies which are all very interesting that gives a better understanding of the issues discussed.

Not too cheap, but a well worth read! Compared to a crash, if it saves you, it is well worth the investment!
USD 44.95
GBP 27.95
EURO 39.95
AUD 59.95
NZ$65.00

You can find more info on the book at http://www.fataltraps.com/

Some of you may already have this book.

Gordon

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