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Twinn Rexx
Assembly Manual
13 pgs1.21 Mb0

TECH Twinn Rexx Assembly Manual

Twinn Rexx Assembly Manual
Introduction
Safety Notice
The Twinn Rexx tandem helicopter is not a toy and can cause severe injury or death if not properly assembled or operated. It is not for beginners and should only be assembled/operated by those experienced and qualified. Eye protection is recommended anytime the rotors are turning.
Other Documentation
See the Twinn Rexx support section on our website for additional information and documents.
Tech Model Products L.L.C. • 800 Village Walk # 172 • Guilford CT 06437 • www.techmodelproducts.com
Rev B 4/03/10
Specifications
Shaft to Shaft Distance 20.25 inches Weight (no body or battery) 1160 grams (approximate) Motors 300W - 500W 3S or 4S (2500KV 11T pinion on 4S) Servos 6 - HS65 or HS65MG Receiver 6 channel Yaw gyro Gy240 or GY401 (with 7+ channel radio) DCP gyro Gy240 BEC 5V 3.5 Amp min. ESC 35 Amp Tandem controller Tech TH-2 GP + extender board + mounting plate Rotor heads 2 - Align plastic/metal Rear main shaft Stock Align 450 shaft Front main shaft Custom Blades 315, 325 or 335 Main drive gear Stock Align main gear
Assembly Notes:
1. All metal to metal fasteners must use medium (blue) thread locker. DO NOT USE THREAD LOCKER ON PLASTIC PARTS. Thin CA should be used for locking metal to plastic parts together.
2. All of the M2.5x30 frame screws should enter the frame from the left side. That is the screws heads are on the left and the nuts are on the right.
Recommended Tools/Materials
Tools Required: Materials Required: Safety Goggles/Face shield Acetone (used as degreasing agent) Drill - small drill bits - 1mm, 2mm etc. Thread locker (medium - Loctite 242) Marking pen (Sharpie etc) Pinion glue (Loctite 609) Hobby knife #11 blade Thin CA Rulers - caliper etc. Silicone rubber or Goop glue Soldering iron - electronics solder Double-sided servo tape Wire cutter/stripper Misc. tywraps Pitch gauge 26 gage servo wire Blade balancer Misc. heat shrink tubing Misc. hand tools 22 gage hookup wire Electrical tape
Tech Model Products L.L.C. • 800 Village Walk # 172 • Guilford CT 06437 • www.techmodelproducts.com
Rev B 4/03/10
1. Front Frame - Assembly
Parts: Qty: Description:
TW-100-L 1 Front left main frame side plate TW-100-R 1 Front right main frame side plate TW-108 2 Main shaft bearing blocks TW-109 1 Driveshaft bearing block w/M2x6 mounting screw TW-111 1 Anti-rotation bracket w/screws (Align 1082 or 1236 modified) TW-500 2 Main shaft bearings - 5x11x5mm (T-HS1028) TW-501 1 TW-502 1 Driveshaft block bearing - 5x10x4 flanged TW-301 1 Miter gear TW-302 1 Miter gear aluminum sleeve TW-304 1 Front main shaft TW-305 1 Main shaft locking collar w/setscrew. TW-306 1 Main drive gear (Align 1057 or 1218) TW-307 1 Front main shaft ring (T-HB6003) TW-308 1 Front one-way shaft (Align HZ026) TW-311 1 M2x20 SH SS Miter gear mounting screw w/M2 locknut TW-312 1 M2x10 SH Main gear mounting screw w/M2 locknut
TW-200-1 4 M2.5 x 20mm frame spacer TW-200-2 8 M2.5 x 5 slotted screw TW-200-5 6 M2.5 x 30 slotted screw TW-200-6 11 M2.5 SS washer TW-200-7 5 M2.5 locknut
1. Attach the four frame spacers to the front right frame side (TW-100-R) with four M2.5 x 5 screws. Use thread locker. See Figure 1a.
2. Attach the front left frame side (TW-100-L) to the right side assembly with four M2.5 x 5 screws. Use thread locker. See Figure 1b.
3. Add the two main shaft bearing blocks (TW-108) with four M2.5 x 30 slotted screws. The bearings face outwards (top bearing faces up and bottom bearing faces down). Use three M2.5 locknuts and six M2.5 washers. Be sure the bearing blocks are parallel to the top of the frame sides and to each other. Leave the bottom block rear screw without a nut and washers for now. Insert the two bearings (TW-500). See Figure 1c.
The top front block screw must be trimmed so approximately 1mm of threads extend past the locknut. This is for clearance with the servo linkage . See Figure 1d.
4. Add the driveshaft bearing block (TW-109) with two M2.5 x 30 slotted screws. The bearing faces towards the front. Use two M2.5 locknuts and four M2.5 washers. Secure the bearing (TW-502) with the M2x6 machine screw. Apply some thin CA to the threads to lock into place.
5. Slide the miter gear aluminum sleeve (TW-302) into the miter gear (TW-301) so the mounting holes line up. Insert the M2x20 mounting screw to keep them aligned. Apply a small amount of thin CA to lock them together. Allow to cure. Keep the M2x20 mounting screw in place without the nut for now.
6. Slide the front main shaft (TW-304) through the top bearing and through miter gear/sleeve assembly. The gear teeth face downward. Continue sliding the shaft through the bottom bearing, through the shaft ring (TW-307), and finally through the main gear/one-way assembly (TW-306, TW-308, TW-
501). Attach the main gear to the shaft with the M2x10 screw and locknut. Be sure the inside of the shaft ring is sitting on the outside of the one-way shaft. Leave the miter gear unfastened for now. The screw will be added after the rotors timing is set.
Tech Model Products L.L.C. • 800 Village Walk # 172 • Guilford CT 06437 • www.techmodelproducts.com
One-way bearing - HFO-612 (T-HS1229) - Assembled into main gear
Rev B 4/03/10
7. Add the main shaft locking collar. Use thread locker. Add the anti-rotation bracket (TW-111). Apply some thin CA to the threads to lock into place. See Figures 1e...1h.
2. Rear Frame - Assembly
Parts: Qty: Description:
TW-101-L 1 Rear left main frame side plate TW-101-R 1 Rear right main frame side plate TW-105 2 Landing gear locking plates TW-108 2 Main shaft bearing blocks TW-109 1 Driveshaft bearing block w/M2x6 mounting screw TW-111 1 Anti-rotation bracket w/screws (Align 1082 or 1236 modified) TW-301 1 Miter gear TW-302 1 Miter gear aluminum sleeve TW-303 1 Rear main shaft (Align 1011) TW-311 1 M2x20 SH SS Miter gear mounting screw w/M2 locknut TW-400 1 LG cross beam TW-500 2 Main shaft bearings - 5x11x5mm (T-HS1028) TW-502 1 Driveshaft block bearing - 5x10x4 flanged
TW-203-1 6 M2.5 x 20mm frame spacer TW-203-2 8 M2.5 x 5 slotted screw TW-203-5 6 M2.5 x 30 slotted screw TW-203-6 12 M2.5 SS washer TW-203-7 6 M2.5 locknut TW-203-8 4 M2.5 x 8 slotted screw
1. Attach the four frame spacers to the rear right frame side (TW-101-R) with four M2.5 x 5 screws. Use thread locker. See Figure 2a.
2. Attach the rear left frame side (TW-101-L) to the right side assembly with four M2.5 x 5 screws. Use thread locker. See Figure 2b.
3. Add the two main shaft bearing blocks (TW-108) with four M2.5 x 30 slotted screws. The bearings face outwards (top bearing faces up and bottom bearing faces down). Use four M2.5 locknuts and eight M2.5 washers. Be sure the bearing blocks are parallel to the top of the frame sides and to each other. Insert the two bearings (TW-500). See Figure 2c.
The top front block screw must be trimmed so approximately 1mm of threads extend past the locknut. This is for clearance with the servo linkage . See Figure 2d.
4. Add the driveshaft bearing block (TW-109) with two M2.5 x 30 slotted screws. The bearing faces towards the rear. Use two M2.5 locknuts and four M2.5 washers. Secure the bearing (TW-502) with the M2x6 machine screw. Apply some thin CA to the threads to lock into place.
5. Slide the miter gear aluminum sleeve (TW-302) into the miter gear (TW-301) so the mounting holes line up. Insert the M2x20 mounting screw to keep them aligned. Measure the distance from the end of the sleeve to the top of the gear (top is opposite the end with teeth). The sleeve should stick out about 0.1 inches above the top. Flip the sleeve over and measure again. Use the configuration that has the closest measurement to 0.1 inches.
Apply a small amount of thin CA to lock the sleeve and gear together. Allow to cure. Remove the M2x20 mounting screw.
Tech Model Products L.L.C. • 800 Village Walk # 172 • Guilford CT 06437 • www.techmodelproducts.com
Rev B 4/03/10
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