Primerius/Keverius gets maidened and then some
OK, there’s this aerobatics league going on, and we at TOSS are getting somewhat serious about it…,
as it leads up to the year end Two Oceans Slope Soarers Aerobatics event
which had it’s inaugural event last year.
So a good few of us have taken the challenge to create purely aerobatic gliders
with that sole function in mind.
At least 3 more gliders are in the process of being slapped together.
I chose to take the design of the Primerius, which Marc Wolfe had successfully
flown into 1 st position in last years contest, and fiddle with it…
the plans… I mean.
With a sharp pencil and a bit of sculpting the square box shape was a thing of the past
and the new vertical stab and elevator were in place.
A scratch build over a 6 week period followed and the newly named Keverius (due to fiddling)
was ready for a maiden.
A pure balsa build, with foam core wing, balsa covered …
nothing beats shaping up a bit of balsa. It’s seriously therapeutic and
you get a glider out of it at the end.
It also takes to cyno just beautifully, about as well as your fingers do.
In the end the maiden was a success in bumpy conditions, and then it was tested
in a 45km/h North Wester up at Chappies in the afternoon and shows a great rate of knots
while being quite stable and very direct in its tracking and high energy retention.
2 evenings later we got to fly it in dying lift and this glider stayed up when a few others had made for the deck.
With a 1,6m wingspan, overall weight of 1.35kg, 25km/h stall speed and a 13oz winloading
this is proving to be quite a versatile machine, and handles like a dream.
Not bad for a design that is rather long in the tooth, ( 20 years since origination)
and the wing section that doesn’t even have a name.
Tim Watkins Baker has just completed the original Primerius version
and will fly that as well for the leaugue, so all that remains is to practice like crazy…
every weekend till the 5th September for the second of the league events
and then beyond to the year end event
Keverius ready to rock and roll