Friday, September 22, 2017

Graupner Chico



Built from plans, but with electric motor, removable wing, hatch on nose for battery replacement.

Weight830 g
Prop9 x 5
Battery3 cell LiPo 2200 mAh
Max Current18 Amp

First flight on Sept. 22, 2017. Roll rate with mostly original aileron setup is a little underwhelming, and slight tendency to pull down with increased power. But generally easy to fly, floats nicely, very gentle stall.
Most important: Terminally cute 70s look.




Saturday, July 22, 2017

Graupner Mosquito



Graupner offered the Mosquito kit from about 1975 on. At the time, it was one of the first electric (under-)powered gliders, also usable as a pure glider, or with a 0.8 to 1.5 ccm Cox motor.

What's somewhat special about it is the sleek nose section, accomplished by moving the electric motor back from the front, using an extension to the prop.

Built from plan in about 6 months. Total weight in the original glider version was 1100g. With 'Jumbo 540 F G6' motor, 6:1 gear and NiCd battery, it was around 1600g.

Wingspan2500 mm
Length1100 mm
Wings Area44 dm2
Tail Area7.5 dm2
Weight1300 g
MotorMVVS 2.5 1350
Prop9 x 5, folding
Battery3S LiPo, 2200 mAh

First flight June 3, 2017. Very slow, majestic, low sink rate, flat glide. Typically flights of about 15 minutes require motor run time of only about 3 minutes, leaving the LiPo 80% charged.




Sunday, January 1, 2017

Graupner Bugsier

Very slow progress, but progress nevertheless over the holidays on Graupner Bugsier.