how to draw a tiger tank

Driving Tiger E

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For edifice a right model I remember it is necessary to understand how the Tiger moved.

About models use two electric engines, direct driving the tracks. This provides stepless speed change for each track. Combine this with the commonly very high power to weight ratio and you take a model tank that drives around similar a race car. Off course the real Tiger's movement had some limitations. On this page, I try to explicate out how it worked. For this we need to accept a closer look at the tracks, the steering unit of measurement and the gearbox.

The tracks:
The get-go tigers were fitted with mirrored tracks, but this proved to be a logistic nightmare, and so it was decided to utilize the aforementioned rails on both sides of the vehicle. As a consequence, the Tiger pulled to one side when driving straight. Some reports say this is caused by a unlike grip because one of the tracks is mounted reversed. I take a dissimilar opinion. I call back the divergence in pull is caused by the rail shoes non beingness in the centre of the rails links. When driving, the left track's shoe hits the ground and and so rotates into horizontal position, while the correct rails'southward shoe is already rotated when it hits the ground. As a result the left track is stretched a bit more than the correct track while driving. The effect would be something like driving a car with larger left wheels....
When driving a model with two electric engines this consequence won't occur since the ability ratio will just be corrected.
A single engine vehicle should clearly show the difference.

Steering:
Ane of the beginning questions about the Tigers steering is: Could the Tiger practice a pivot turn? Technically - Aye, Advisable - No. Searching for an answer, I found several complex drawings of steering units and gearboxes and text how to drive the Tiger. In order to understand the working of the steering unit, I think it is necessary to explain the basics of the gearbox start.

gearbox1-scr

The drawing in a higher place shows the bones operation of the gearbox, which has viii forward and four reverse gears. In the drawing the commencement gear is engaged.

The carmine numbers signal the number of cams on each cam wheel. The red parts are dog clutches which slide -not rotate - over axles stock-still to the cam wheels. The blackness and red squares with crosses represent the clutch teeth, beingness engaged or disengaged. "H1" is the reverse clutch, while "H2" is the frontward (low speed) clutch. "H1" and "H2" are manually operated past a lever on the side of the gearbox. This lever has three positions: forward, neutral and opposite. The shifting forks "F1", "F2" and "F3", are hydraulically operated. "F1" and "F2" operate two clutches each. If 1 of the clutches is engaged, the other one is disengaged. (This was not clear in other drawings I found) "F3" does not take a costless position.

Somewhat confusing in all the drawings I have seen, is that at that place are two output axles leading to the steering unit. The lower beam is used for steering the vehicle. This axle seems to be straight connected to the engine and information technology can non be disengaged. The reason it appears in all the drawings is that it runs through the lower cam axles and clutches, simply it has no function in the gearbox.

Behind the gear selector there is a mushroom shaped button which is the parking restriction; It operates a brake on the master clutch. This push is likewise used when making a pivot turn, to make certain there is no forward or contrary move.

steering-scr

In the above diagram, we see the primary shaft from the gearbox direct driving the housings of two planetary gears (Red). Their rotation causes the rotation of the output axles (Blue) via the planet wheels. Steering is washed by rotating the planetary gears sun wheels (Black) in opposite directions.

In the centre of the cartoon, we can find the steering input axle. (Light Blue) This drives either a high speed or a low speed clutch. (Magenta) The two outer clutches are used to change the direction of rotation of the adjacent axle.-Note the contrary wheel virtually the right clutch. This beam drives the planetary sun wheels in opposite directions.-Annotation the reverse cycle near the right planetary gear.

The clutches in the steering unit are hydraulic operated by the steering wheel. Of involvement here is that the exterior clutches only have full pressure or none, whilst the inner "speed" clutches are operated proportional, pregnant that on turning the wheel, the low gear clutch will get force per unit area in increasing steps. When the max pressure for the lower gear is reached, the college gear gets low force per unit area. Side by side, the low gear pressure is dropped completely, whilst the higher gear pressure will build upwardly in increasing steps.
With the steering unit in neutral gear, both left and right clutches are pressurised, causing the gears to be "locked" and the tank steering straight.
The tank is also equipped with left and right steering levers. If 1 of these levers is pulled, the hydraulics to the gearbox are asunder, with the upshot of the gearbox acting as a differential. This means that if i lever is pulled, the brake on that track is applied and the track slows down whilst the other track speeds up.

The steering input axle is directly driven by the engine, so the rotation difference between the tracks besides varies with the engine speed. The actual turning radius is then depending on vehicle speed. At null speed, the tank volition practise a neutral turn, whilst at high speed but a wide curve will result.

Speed:
There is some controversy about the Tiger's speed which is mainly caused past the factory settings for the engine max. rpm. Starting November 1943 this was reduced from 3000rpm to 2500rpm, causing the maximum speed of the Tiger1 to exist reduced from 45km/h to 38km/h.

The verbal speed with the engine at 3000rpm tin exist calculated equally follows:
(Gearbox reduction in highest gear: 0.98) x (End reduction at sprocket: 10.55) = 10.339
There are xx rails links passing over the sprocket bike at each rotation.
The track link pitch is 130mm, which means that with each rotation of the sprocket, the tank moves 2600mm or 2.6m
So, 3000rpm / 10.339 total reduction = 290.163rpm final = 17409.78rph
17409.78rph x 2.6m per rotation / 1000(km) = 45.265km/h

The verbal speed at 2500rpm would be 37.72km/h

- "D.West. to Tiger1" by Jentz & Doyle

- "Der Panzer-Kampfwagen Tiger und seine Abarten" past Walter J. Spielberger & Hilary L. Doyle

- Tigerfibel

- "The Tiger Tank: a British view"

- Military machine Intelligence Summary 1943

- D656/21