21
far out. As you set the VG tighter, the trim speed will normally increase and the trim bar position will move back.
rther forward your hang point is, the faster the glider will trim, the less effort will be required to fly fast, and
the more effort will be required to fly slow. If the glider's trim is too slow, it will make the glider more difficult to control in
roll
ch
rog system
is the primary
ttack, and thus provide a nose
up pitching moment. The sprogs are adjusted at the factory to their proper settings.
GLIDER TUNING
TRIMMING YOUR GLIDER IN PITCH
CG ADJUSTMENT
You will find that the pitch trim of the Combat, as well as the basetube position at trim, changes with VG setting. At
VG loose, the Combat will normally be trimmed very close to stall. The bar position at trim at VG loose will be relatively
At VG loose, the pitch is very well defined, and the pitch force increases quickly as you pull in from trim speed. At
tighter VG settings, the "pitch well" becomes more "shallow," and the pitch force increases much less as you pull in from
trim speed.
Overall pitch trim is affected by several factors. Among the most significant is the location along the keel of your hang
point. The fa
, especially in turbulent air and when the nose pitches up on entering a strong thermal.
On the Combat, hang loop fore and aft position is adjusted by repositioning the hang point tower on the keel.
Do not
miss the holes in the keel tube during hang point position adjustment!
Pilot’s weight has an effect on the trim speed. If the trim speed is got for a pilot of 80 Kg, a pilot of 60 Kg has to move
the hang point tower to the next backward hole to keep this trim speed.
COMBAT SPROG ADJUSTMENT AND FLIGHT TESTING
The Combat uses inboard and outboard sprogs in combination with one transverse batten on each sprog. Ea
transverse batten spans two top surface battens, so a total of eight top surface battens are supported. The sp
component of the system, which provides pitch stability.
The function of the system is to support the trailing edge of the sail at low angles of a
SPROG MEASUREMENT WITH PELLICCIOMETER
There is the method of checking sprog angles with the Pelicciometer (the newest instrument designed by Thomas
Pellicci to check the sprog angles).
1. Set the VG to full tight.
2. Using the Pelicciometer as shown on fig. 28 set the keel tube horizontal (0 deg. on the Pelicciometer) and put a
keel tube on a support to maintain 0 deg. angle during further measurements.
