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Electric Stunt => Gettin all AMP'ed up! => Topic started by: Vincent Corwell on April 29, 2015, 08:11:36 AM
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Anybody done an electric Don Still Stuka, Brodak kit with E conversion ?
looking for : power pack , prop, all up weight,
thanks in advance
Vincent
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Or you could use the Stills Stuka from RSM since that one is approved by Don Stills and represents his actual model.
The Stuka is an easy conversion as it is sized for a .25 glow engine. Our Black Tiger BK 3536C motor with a 3 cell battery (the RSM 25 System) will power it at a completion performance level.
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Vic,
I have done this, a couple things you need to do if you are converting an IC ship. I used a front mount, use at least 3/16" plywood mount with two small wood screws per side through the fuse plywood sides to hold the mount (flat side on the mount) as well as epoxy (you might be able to get the nose mount from Tom Morris pre-drilled). Second, you need to hollow the top block very thin to allow the battery to be positioned about 1/3 back over the wing leading edge. Make sure you allow room for the battery to puff a little (I had mine a little to close and had to go back and open it up to fit and keep the balance). The flaps on mine were a bit flexible, I would cover them with silkspan/dope then cover with film to keep them stiff. The ship flies very well on electric but you need enough battery, I tried 4S-2100 mah and it is OK for OTS but short for PA/Classic, go with 4S-2500. Here is the set-up:
E Don Still Stuka
Ship is 42" span, 36 oz dry, 44 oz with battery
Motor = turnigy 35 42B - 1000
Battery = TP 2100 Pro Lite 4S1P
Timer = Ztron 3
ESC Phoenix 35 CC link 3.255, CL Governor - fixed rpm mode, spool custom 8, Governor gain 30, Head Speed change rate -8, 14.8 battery, rpm 9000, motor start med 59, motor timing 8, direct drive, forward, PwM Rate 16 Khz, Brake 100 (hard), Brake delay 0.2, Brake ramp Fast, Cut off - Lipo/normal
Lines = 0.015, 59" C to C
Lap time = 5.0
Flight time 5m, 10sec
Best, DennisT
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Many thanks for your numbers Dennis,
mine was from RSM kit, 47 1/2" wingspan but at 44 ounces would drain the 2200 lipo at 4-41/2 mins
so I am waiting for the Brodak kit to see if I can build much lighter, Dennis Adamisin reckons he can
get one down to 32 ounces, way beyond my building skills, what a great sport this is though , especially
with the support from forum, as Stunthanger
Best regards
Vincent
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Vincent,
I've seen Dennis' Stuka fly a few times. It flies as smooth as silk and it's a great looking model!