Thermal duration electric motorglider competition flying
Whatever the
formula of the competition (“200m”, F5J, etc.), these are the usual
“proceedings” of a r\c thermal duration competition:
The competition is
established by a flight matrix, divided in rounds and, if need be due to the
nr. of contestants, subdivided in groups per round (usually 4 to 8 pilots can
fly in the same group), so that every pilot flies once in every round and
changing as much as possible the opponents for each particular pilot. The ideal
situation occurs when after a preset nr. of rounds (usually between 4 and 6) every
pilot has flown against every other pilot and every pair of competing pilots
has flown exactly the same nr. of flights between them.
After the
contestants are informed of the flight matrix, a preparation time is given
(usually 5 minutes) and the competition flight begins with the audible warning
of the start of the working time. As the model is launched by the pilot (or his
helper) with the motor on, the timekeeper starts his timer and after a maximum
of 30 seconds for height gain the power has to be immediately cut under penalty
of a zero score on the flight. The soaring phase of the flight now begins, to
end as close to the finish of the (10 minute) working time as possible, to do
this it is essential know how to find and use thermal updrafts or at least to
avoid the downdrafts.
If the model’s
flight continues after the end of the working time, depending on the specific
set of rules, points will be deducted for each second over, loss of the landing
bonus and if exceeding the working time over 1 minute the flight will have a
zero score penalty.
In addition to the
task of flying the 10 minutes there is also a landing bonus, with points gained
by measuring the distance from the model’s nose to the centre of the designated
landing target (after the model has landed and has stopped), the maximum bonus
is gained if the model’s nose rests less than one meter from the target, as the
distance increases the bonus decreases, this means that the difficulty of the
double task is considerable, the ideal is to land at the last second of the
working time and on the centre of the target. This requires a good knowledge of
the model’s characteristic strong and weak points, of aerology, of the local
flying conditions and plenty of training.
When the model
touches the ground the timekeeper stops the watch, records the flight time
(including the motor run time) and measures the distance to the landing target.
The pilot that has
obtained in his group the highest total sum of points gained by his flying time
(1 point per second) plus points gained by the precision landing bonus (which
vary according with formula rules, usually 50 or 100 points are won for a
landing less than one meter from the target) scores 1000 points and the
remaining pilots in the group score in direct proportion. For instance, pilot A
has flown 8 minutes and 10 seconds (490 seconds) and landed his model less than
one meter from the target, then his total points will be 490 + 100 = 590 points
and, after calculating the points of the other pilots in the group, the points
of pilot A are the highest in the group so he scores 1000 points; pilot B has
flown 9 minutes precisely but has landed his model more than 15 meters from the
target so his total points will be 560 + 0 = 560 points and his final group
score is (560 X 1000)/590 = 949 points.
This “normalized”
scoring results that winning the coveted 1000 points is a function of the
relative performance in the group, one can win the maximum score by flying, for
instance when the updrafts are non-existent, only 5 minutes as much as to get
those same 1000 points a flight of nearly 10 minutes and a very good landing is
necessary if the air is full of thermals and the pilots in the group are expert
flyers. Of course more than one pilot (or even all!) in the same group
can score 1000 points.
After 4 complete rounds are flown it is usual to discard the worst score
from each pilot (for instance if a pilot won 1000, 870, 1000 and 500 points in
the 4 rounds flown then 500 points are discarded and his final score is 2870
points), after adding all the group scores and subtracting the discarded score,
the pilot with the highest final score wins the first placing and so on until
the lowest final score is the last placing.