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Old Nov 08, 2013, 04:13 AM
member of 400km/h club
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bird of paradise 2

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.
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Last edited by scorpion-fan; Feb 09, 2014 at 07:00 AM.
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Old Nov 08, 2013, 07:22 AM
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Joined May 2011
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Very nice......

the elevator has deviating yellow
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Old Nov 08, 2013, 07:29 AM
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Joined Nov 2008
479 Posts
yes, you're right.

I take, what I get into my fingers...
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Old Nov 08, 2013, 08:02 AM
Heavy thinker..I mean tinkerer
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Canada, ON, Aylmer
Joined Apr 2009
746 Posts
very cool looking plane. Should move right along nicely.
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Old Nov 08, 2013, 08:51 AM
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Canada, SK, Prince Albert
Joined Jan 2006
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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.

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Old Nov 08, 2013, 08:58 AM
member of 400km/h club
scorpion-fan's Avatar
Joined Nov 2008
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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.

will give:
20,6V 208,1A 4287W 10133rpm
v85% = 413km/h
thrust about 3,3 kg
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Old Nov 08, 2013, 09:45 AM
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Canada, SK, Prince Albert
Joined Jan 2006
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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
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Old Nov 08, 2013, 09:55 AM
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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.

Over 400 KMH 245 MPH Speeder Pylon Peregrine World Record attempt in Ballenstedt on 14.09.203 (4 min 47 sec)


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):
Speeder Pylon Peregrine World Record attempt "failed start" in Ballenstedt on 14.09.2013 (0 min 17 sec)

nothing bad happened.

b.o.p. has the half weight of peregrin.
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Last edited by scorpion-fan; Nov 08, 2013 at 10:05 AM.
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Old Nov 08, 2013, 10:06 AM
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You can really hear the different phases that the prop goes through in that first video that's some great stuff.
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Old Nov 09, 2013, 12:56 PM
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Canada, SK, Prince Albert
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SF - was wondering do you guys use any mixes for launch that play with camber at all just to give it a bit more lift?
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Old Nov 09, 2013, 12:59 PM
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no.
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Old Nov 25, 2013, 10:18 AM
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Joined Nov 2008
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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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Old Nov 25, 2013, 10:38 AM
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Canada, SK, Prince Albert
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Was yoke a 0 degree for that graph?
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Old Nov 25, 2013, 10:50 AM
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yes.
was a 3blade yoke with 0 degree and 53mm diameter in blade folding axis
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Old Nov 25, 2013, 10:52 AM
300 mph club ;-)
M. Koch's Avatar
Regensburg, Germany
Joined Apr 2003
516 Posts
Yes!
53mm yoke, 0 degree (see graph: 10"x17"B/53/0)!

Ciao, Marcus

Too late ;-)! Ralph was faster!
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