NOTE: The original JT-5rotor head had a mechanical
tachometer drive (VDO, Germany). Since advanced optical and magnetic transmitters can be obtained today with electronic
Needle bearing INA NA4900.2RS http://www.ina.de/
tachometers, no details have been shown.
9
11
10
18
25
Rotor Blades are of glass reinforced plastics (epoxy). Rotor diameter 7.0m, Chord 180mm. Rotor weight includi ng the hub 17 kg, normal rpm380, max rpm550. Preset coning angle 3°..3. 5°. Bl ade profile NACA 8-H-12
Bearing type 32052RS. http://www.skf.com http://www.ina.de/
24
24
19
Aerodymamic Pitch 4° Geometric Pitch 1.5°
Axis of zer o lif t
25
Blade root
9
Polyurethane or PVC foamcore 45° degree fabric laminate
Blade root bolt axis 4.0°
Trailing edge level
1.5°
Unidirectional glass fiber
50
180
Chordvise balance weight Ø8 mm lead rod
16
8
INA PAF 10120 P10 http://www.ina.de/
F la p pin ping g st o ps ps +8°( 9°max )
7
23
17
13
12
6
20
INA HK4020/IR35x40x30 http://www.ina.de/ Use press fit for the inner race on the gear base.
26
1
3 27
Turnedandgrindedto
6
+0.03 Ø35.00+0.02
25
25
22
3
1
2
Important! Dril l a 5mm hole here to drain out possible rain water!
4 21
14
13
Bearing type 6201 2RS. http://www.skf.com http://www.ina.de/
12
Seger J 32 DIN472
28
Rotor Prerotator Bendix Drive, Lucas P/n 25012 consisting of the foll owing parts: Lucas p/n 292241, 291970, 54296889, 54251921, 260404, 250837, 250848 and 250849. http://www.lucasvarity.com/
10
2 25
The new idea shown on the left is based on a Bosch Bendix Drive used in small 2-cycle engines. Similar units are videly used in outboard motors. NOTE: This idea has not been tested and, therefore, no parts or part numbers are shown.
7 0 1
15
Universal Shaft: Lmin=570 mm, Lmax=770 mm Willi Elbe Gelenkwellen GmbH & Co. KG D-71732 Tamm, Postfach: D-Tamm, Germany Telefax: (07141) 605095 Approx. 102 mm Check carefully this dimension for smooth running 161
INA GIKFR 10PW or similar 10mmrod end. http://www.ina.de/
9
NOTE: All bolts, nuts, washers and similar hardware, which have not been specified in these drawings are of standard metric quality (DIN 912) in the 8.8 strenght class. cl ass. NAS, MS andother aircraft air craft quali ty hardware can be used if corresponding changes in dimensions are made, eg: 16 mm=5/8 in, 10 mm=3/8 in, 8 mm=5/16 in, 6 mm=1/4 in, 5 mm=3/16 in, 4 mm=5/32 in, etc.
Signature
Date Jan 29,1998
JukkaTervamäki Harmaapaadentie 12A 00930 Helsinki, Finland
Version
02
Tervamäki Engineering
Scale
1:1
Projection
Drawing
No:03
