Doing your First
Loops and Rolls
Now you've set up your Helicopter lets try a couple of manoeuvres...
First up let’s go with the simple loop. At
this stage I hope all attempting this are atleast flying a circuits. If
you are flying circuits then your revolution
mix should be somewhere near correct as well. Unless you’re using a
heading lock gyro then you won’t have to
run any pilot authority mixes.
Now fly out downwind click into your new
stunt mode and check that your stunt trim is not pitching, rolling or yawing
your helicopter.
Think of the loop in 6 sections:-
1. Turn your model and fly directly
at the wind at a minimum of about 30 metres (100 feet). Trying to build
up as much
speed as you can get.
2. Pull a small amount
of up elevator and see how well the nose pulls up.
Some helicopters come standard with too light
a fly-bar set up and pitch the nose up wildly.
Other helicopters have too heavier fly-bar
set up and don’t pull the nose up very quickly, or you might not have enough
control throws. If it responds nicely to
the up elevator continue with the loop.
3. On the 2nd quarter slowly
relax the pitch back to about ½ way or less. This will stop the
helicopter from dropping
from the top of the loop. In a strong head
wind you will have to pull back a little further or the loop wont look
round
4. On the 3rd quarter you can
start feeding in the power again, if there is a strong head wind you will
have to have a
bit more power on as it will get blown down
wind. Depending on the wind and helicopter set up you may also have
to
pull a little more up elevator in this quarter.
5. The 4th quarter should find
you with full power back on and easing off the elevator stick completely
6. Pull out with the helicopter
in a slight nose down attitude and exit the loop. If leveled off completely
then the
helicopter will loose speed and will have
to drop the nose again to pick its speed back up again, looking untidy.
Easy
Eh!
Now let’s try a roll.
This time we will do the manoeuvre down wind,
unlike an aeroplane a helicopter has no form of forward propulsion,
except keeping a nose down attitude. Flying
downwind during a roll helps keep the helicopter moving forwards.
Keep in mind that we will break this manoeuvre
into 6 parts as well.
1. Fly downwind at full forward speed above 30
metres (100 feet).
2. Start rolling the helicopter to the right
hand side for clockwise rotating helicopters, and left for anti-clockwise
rotating helicopters. For the first roll
give it full aileron stick to see the roll rate. During the roll to 90
degrees pull
the pitch stick back to 0 degrees. If you
don’t then you will end up with more of a barrel roll than an axial roll.
3. During the 2nd quarter you will have to
pull the pitch back to almost full negative pitch depending on how fast
the
helicopter is rolling. The slower the roll
the more pitch required.
4. During the 3rd quarter pull the pitch
back to 0 degrees. During this quarter listen to the engine if it is loading
too
much you may require more throttle in the
bottom of your v curve or a higher percentage in a aileron to throttle
mix.
5. On the 4th quarter push back to full power
and ease off the aileron stick leaving the model upright.
6. Drop the nose slightly to build up speed
again.
How did that look?