getting on with it, week 5
Last week I bought a Twister Storm 3D, this came ARTF just the blades and undercarriage to fit. The instruction gave the settings for common transmitters. The one bit that baffled me was the heading hold gyro, this would give full deflection to the tail rotor servo. I checked on the interweb and found this was correct, the gyro is trying to return the heli to its starting position, the stick input from the rudder tells the gyro the rate of yaw required.
One thing worries me, if the gyro was perfect and you had enough power for a 12 hour flight would the heli rotate 180 degrees ?
I have always imagined a piezo gyro like a wobbling jelly, if it is wobbling symmetrically
when still, rotating it will alter the the wobble to a new pattern. The
crystal in a solid state gryro vibrates and if you rotate it coriolis
force
alters the pattern of these vibrations and sensors detect this.
The cheap hovering toys are often fitted with three gyros to make them flyable.
All I need is a gyro that will slow the tail down enough to make it flyable but
the 3D guys require something fast and accurate to keep the tail steady
while flying backwards at high speed.
Gyros come in two flavours, heading hold and rate, switchable and adjustable
from the transmitter
Back to the Twister , this came with all the servos and gyro fitted, a
battery , charger both mains and battery, I soon had the blades whizzing
round on the floor and getting light on the training under carriage. This is
heavy model and not for indoors so I powered down, luckily it was Saturday and I
could fly at Bentham. It hovered fine just needing a bit of right trim and made a
little less sensitive with the 80% rates and 25% expo.
There are a lot of little plastic parts that look very breakable and the servos
look real cheap but at £137 for the older version with HL400 gyro it seems like
a bargain. The later model with HL800 Gyro is £187
No real progress made, just a little more confidence in the hover and a bit of sideways
Phil
Photo My new Twister storm
Indoor flying
Every Saturday at Bentham Hall 6.00PM till
8.00PM, bar open after.
This venue is open to all with BMFA insurance, spectators welcome, criticism
in the manor of Statler
and Waldorf especially welcome
Photos from the 18th session at glos-mfc.co.uk
Only twenty this week perhaps many were put off by the cold weather
Photo:- slight friction between the macho heli pilots and the sissies
that fly fixed wing.
I had a combat session with Paul's Heli and my depron Pogo last year, I came
second
Phil
With Paul G. announcing that the Holy Cow had a bit of a runny nose and was confined to home to avoid a foot and mouth scare members were able to make their way to Bentham and fly safe in the knowledge that the GMFC committee had considered all the health and safety issues before carrying on with life as usual. As it turn out the roads were clear and the freezing temperatures forecast did not appear.
However as expected numbers were down to twenty, with the majority again
"flying" helicopters.
Chris
