CHALLENGER I Improvement Program

 CLARK  

FIRST PRODUCED:1982
TOP SPEED:37 MPH
RANGE:240 MILES
ENGINE: CONDOR V-12
POWER TO WEIGHT RATIO: 19.2HP PER TONNE
ARMOUR THICKNESS: CLASSIFIED
PRIMARY WEAPON: 120MM RIFLED GUN

 

 Program objective:

1. Vertical layout of turret rotation gear box for less transmission lose,

2. Test bed of CFS,

3. Gun barrel evaluation angle of +20 ~-10 degree,

4. New speaker for better sound quality,

5. To 130 type 6V carbon brush motor for better mobility.

 Controller:

CSCII-135-CR1, LNSI

 Transmitter:

Futaba SKYSPORT4

 Receiver:

GWS R6N 72MHZ(6CH)

 Power:

Li-Po 7.4V 850mah

 

 

 Lower turret

 

 

 

 Turret rotation gear box

 

 

 Turret rotation gear ring

 

 

 Attaching receiver and anttnna

 Receiver holder that we are going to use, made by CNC

 Clean, drill and tap with 2mm*0.4mm hole

 remove receiver cover, install receiver with M2 crew.

 0.3mm black spring wire is used for antenna, solder with 0.5mm copper tube at the end

 connector holder

 2 pole, 1.25mm pitch connector is used for antenna connector, short 2 lead with solder

 push connector into connector holder, wire antenna wire of receiver to a pole of connector, plug spring wire antenna to another pole of connector. spring wire antenna can be unplugged when transporting

 

 Attaching CSCII

 

 

 

 Attaching LNSII

 

 

 

 Gun barrel

 make hole for wring LED

 push in gun evaluation gear , no cement is needed,

 Trim XXX for evaluation gear movement

<ENG>將砲耳栓黏貼到砲耳軸承座的兩邊上

 Gun breech part

 

 

 Gun barrel evaluation servo assembly

 Parts for servo assembly

 Drill 1.4mm hole

 install a nut

 tap 1.4mm hole with screw

  Assembly parts with cement

 Drill 1.4mm hole

 clean 1.4mm hole with 3~4mm drill head

 Assembly parts with cement

 Drill 1.4mm hole and tap it with 2mm *0.4 taper, depth of 3 mm is enough

 install servo with 2mm screw

 if 1.4mm hole is loosen by over strength, trim the hole and install a nut. and use long screw to install servo

 assembly servo gear parts with cement

 install servo gear to servo

 servo assembly completed

 

 

 Attaching gun barrel evaluation servo assembly

 

 

 

 Power Pack( Low Noise, High Torque )

 

 

 

 

 

 

 

 Power Pack ( High Speed )

 

 

 

 Idler wheel

  idler wheel arms and bearing

<ENG> 惰輪擺臂上的M1.4螺絲是用於迫緊軸心之用.

<ENG> 將軸心穿入軸承. 並上一點潤滑油在軸心與軸承間使運轉更順暢.

<ENG> 將組好的軸心軸承塞入惰輪殼中

<ENG> 再黏合惰輪

 <ENG>裝上惰輪擺臂再用M1.4螺絲鎖緊軸心.

<ENG>將張力調節器外殼的一側打磨成垂直狀態

 <ENG>套上模板後鑽孔

 <ENG>在張力調節器內側黏上透明墊片後再攻螺紋

<ENG> 把惰輪臂鎖上後安裝惰輪張力調節器

 <ENG>磨除定位用凸出物

<ENG> 黏上張力調節器, 並將張力調節器,前裝甲板與惰輪軸活動範圍內干涉部位修除

<ENG>用六角棒穿過惰輪, 確實把惰輪臂鎖緊. 完成如右圖

<ENG>小技巧:如果鎖緊時用力過度, 發生滑牙情況, 只要用烙鐵將膠條熔化填入螺絲孔中再重鑽即可.

 

 

 Road wheel

 Trim plastic shaft till A part of B001 can be fitted into right position

Assembly B001

Fit assembled B001 into B002, be award with direction of B002

Fit assembled B001 and B002 into road wheel part

Glue B002 with road wheel by model cement and B001 A part with plastic shaft with quick cement,

Remove hub of road wheel part 2

Fit small rubber tube to shaft and than glue two road wheel parts as the TAMIYA assembly guide said

Just apply a little of cement on surface to be jointed, adjust position of road wheel, than apply more cement to glue road wheel.

Just apply a little of cement on surface to be jointed of A38 and A39, adjust position of road wheel, than apply more cement.

Remove rim on road wheel for preventing interference between road wheel and guide horn on track

 

 

 Return Roller

 make hole on center of return roller

Trim return roller shaft as shown on picture for guide horn on track link

to use probe as shaft

Cut one end of shaft

remove spring inside probe

push modified probe to return roller

same modification is applied to small return roller

 all of 6 modified return roller

 drill hole with assistance of fixture

 install shaft holder

install shaft holder to lower hull with cement

 

 Drive Sprocket

 

 

 template