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Russell's World Tour - Freiburg, Germany, 16.7.2003
Speed Measurements

Russell McMahon is one of the major contributors to the WR mailing list. A while ago he announced his plans for a 60 day world tour. I am very happy that his party took the time to stop by our place. This page shows the second day of their stay during a small airshow that we made on a large harvested field in the neighbourhood.

One of my favourite rockets, Backmax1, with a New Zealand/German covering. It opened our small airshow.

 The world tourists: Russell, Val and Rod from New Zealand.

 Two German hobby RC modelers, Gerhard and Heinz, who helped to improve the airshow with their aircraft.

 Rod and myself discussing the different types of water rockets.

Val holding my new WR made out of PP, designed as backglider without additional weight.
Heinz, holding his model helicopter.
Russell with his 5-continent water rocket.

Heinz, showing great helicopter art in free air.

He steers a LMH 110 model helicopter, fully RC equipped, with an electric motor. The machine is very delicate to handle. Full concentration is necessary to keep control of it.

Gerhard during the start of his fast going 2 meter glider with v-shaped tail unit and a powerful electric motor, closely observed by our guests. He excelled with daring aerobatics - and a safe landing on the stubble-field.

Model = EXCEL COMPETITION 2 made by Simprop

 

With Gerhard's camera we could make some nice videos with 30 frames per second. Here is the start of my trusted RuMMa2 rocket with a 3.5 mm T-nozzle. When I had built it more than 2 years ago, I never expected that Russell would come up here (from down under) to see the rocket named after him. Watch her (with Russell on the left) ascending slowly and evenly.

Rumma NZ4

 

time msec

altitude m

v m/s

a m/s2

v km/h

0

0.00

0

0

0

33

0.04

1

40

5

67

0.54

15

404

53

100

1.19

20

142

70

133

1.87

20

20

73

167

2.54

20

0

73

200

3.21

20

-0

73

233

3.89

20

0

73

267

4.58

21

20

75

300

5.29

21

10

76

333

6.01

22

10

78

 As a contrast, my ClearFTC2 rocket:

CFTC2NZ6

8 bar

time msec

altitude m

v m/s

a m/s2

v km/h

0

0.00

0

0

0

33

0.27

8

240

29

67

1.41

34

790

124

100

3.38

59

740

212

133

5.38

60

30

216

All altitude measurements were taken on my computer screen with the original frame pictures with reference to the 1 meter pole.
The pictures here have been reduced to save space.

The last and fastest rocket in this series, a Badoit (French Mineral water) 1 liter with half a tennisball as a nosecone:

BadoitNZ3

7,5 bar

time msec

altitude m

v m/s

a m/s2

v km/h

0

0.00

0

0

0

33

0.24

7

220

26

67

1.87

49

1240

175

100

4.00

64

460

230

133

5.87

56

-240

202

However, all acceleration figures are to be read with care: small errors in the altitude numbers may lead to large errors in the acceleration figures due to the calculation process, especially with the RuMMa rocket. All figures are mean values for the given time interval. Distortions in the camera perspective have not been considered.

 

Ready to go: Russel's 5-continent rocket from AntiGravity with a cap-sized nose cone from my tool shop closed our little event.

 After the air show, all of us assembled with our arsenal of aircraft of all types:

Ten water rockets, one helicopter and two planes. Yeeha!

The New Zealanders left straight from our launch site to a sightseeing tour through the Black Forest with Munich as the final destination of the day.

Thanks for coming, it was very nice to have you here!

 

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Stand / Last Revision:  30.07.2003

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