|Nov 08, 2013, 05:13 AM|
my speeders (also with scratchbuilt wings)
one of my personal projects for the 2014 speed season is the second "bird of paradise".
it will fit into the rules of german national "limited" speed-chart.
it's a chimera again:
the fuselage comes from eagle-T, built by marcus koch,
the elevator comes from Teaser f5b, built by niklas kahlich,
the wing is foam-carbonfiber-balsa sandwich, (built in the "ninja way" ) by sascha wendt,
the motor is a 4530 evo based on scorpion prototype.
it is fired by 6S 3300 (limited) to 4200mAh (open).
esc is yge 160FAI - good for >200amps > 10sec (tested in real).
airscrew is my 13x31,5 folder as shorted 3 blade config.
with less than 10000rpm good for 400km/h.
wingspan is 140cm, lenght 125cm.
FAI wingarea is 33,4dm^2, good for 2500grams.
|Nov 08, 2013, 09:51 AM|
What kv are you running on the motor and what size prop will you be using? That wing looks a bit shorter than you usually run.
|Nov 08, 2013, 09:58 AM|
n spec: 610/V
motorcode: 12N10P4530evo5+4 x 1,7YY
prop: as just written 13x31,5 (shorted to 200Amps) 3 blade folder.
have a deeper look on the photo, it is just mounted on motor.
20,6V 208,1A 4287W 10133rpm
v85% = 413km/h
thrust about 3,3 kg
|Nov 08, 2013, 10:45 AM|
Sweet Is the 1.7 in the motor code the diameter of the wind wire? I am getting ready to rewind my motor with larger wire and was going to go with 1.5mm.
How does it launch with that drastic a pitch. Marcus has been giving me some tips on setup for launching with crazy pitch numbers which includes setup in the ESC as well. My biggest fear is another prop stall incident
|Nov 08, 2013, 10:55 AM|
yes, 1.7mm diameter wire is used.
in the motor tests i have loaded it with >250amps.
a launch of the 5kg (!) speeder peregrin with this 13x31,5 prop.
you easy can hear, when the prop gets full grip after acceleration.
I start my models alone everytime and never had problems to start with these props.
here you have a failed start (esc-problem):
nothing bad happened.
b.o.p. has the half weight of peregrin.
|Nov 25, 2013, 11:18 AM|
today the bird was maiden without any problems.
for the first flight I used a mild setup.
good for round about 60m/s climbing after acceleration and thrust-orientated.
speed was only about 250km/h. but good enough for 150m further climbing after cut of in vertical climbing.
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