Slipstream 50cc SBach 342
As the 2012 flying season and my aerobatic practice progressed I began to think of a scale aerobatic airplane for 2013. I figured I'd buy a 30cc sized Almost Ready to Fly airframe and equip it with the components that fit best. In October, however, a complete 50cc SBach came up for sale on an online forum at an excellent price. The seller was someone I knew - we talked it over, and I bought the plane. Hello, giant scale!
There was some cleaning up to do changes I wanted to make, so it was overhaul time. I realized after I got the plane into my workshop that the landing gear was badly twisted. The seller offered to fix it. He did a great job and when he brought it back to me I got to work. The to-do list was extensive (see the Modifications section below)... but I'm done and the plane is flying beautifully.
After not flying the plane for more than a year I came to the conclusion that I just did not have the time to commit to aerobatic practice. Rather than let it gather dust, I sold it to a fellow member of my flying club.
This is a work in progress guided by Peter Goldsmith's excellent article. See the trimming page for details.
|Flight time:||3h 07m|
|Landings:||33 (two minor crashes)|
|Wingspan:||2210 mm (87")|
|Length:||2006 mm (79")|
|Weight:||9.0 kg (19.8 lbs)|
|Powerplant:||Desert Aircraft DA-50R 50cc two-stroke gas|
|Receiver battery:||6.6V 2500 mAH A123|
|Ignition battery:||6.6V 2200 mAH A123, regulated to 5.2V|
|Ignition kill:||Smart-Fly fibre optic|
|Aileron servos:||Savox SC0251MG x 2|
|Elevator servos:||Hitec HS-5945MG x 2|
|Throttle servo:||Hitec HS-625MG|
|Rudder servo:||Hitec HS-5945MG|
|2014/05/21||Working with the CG has resulted in much better behaviour. Was much too nose heavy before; landings are easier now.|
1The Slipstream 50cc manual is lacking in detail and poorly written. It does list the recommended control throws and CG but in my experience the specified CG - 150 mm from the leading edge of the wing - is much too far forward. The copy I have was scanned by a friend who owns the same plane; repeated requests to Slipstream for a copy of the manual went unanswered.