Dangerousdave26

November 19th, 2009, 20:09

For my first attempt at creating flight dynamics I thought I would mess around with the FS2004 Pander S.4 Panderjager so far I have taught myself a lot and I am happy with it but...

I collected data from as many sources as I could and for values I could not come up with real world numbers I did the next best thing. I looked at other similar aircraft from that period. I did not copy those values as much as I applied some SWAG to them.

For reference here is the real world data I collected.

<from various sites>

3 Wright Whirlwind R-975-E2 engines, 420 hp each.

Length 12.5 meters, 41.0 feet

span 16.6 meters, 54.4 feet

height 2.9 meters. 7.5 feet

Wing area: 46 sq. meters 150.9 feet

Empty weight: 3,441 Kilo's, 7 586.1 lbs

MTOW 5,736 kilo's, 12 645.7 lbs

Max speed 360 kmh, 223.7 mph, 194.4 kts

cruise speed 300 kmh, 186.4 mph, 162 kts

Landing speed 120 kmh, 74.6 mph, 64.8 kts

Ceiling 5,400 meters 17,716.5 feet

Range 2,950 kilometers, 1,833.0 miles, 1,592.9 nm

R-975E-3: 420 hp (313 kW) @ 2,200 RPM up to 1,400 ft (427 m), 450 hp (336 kW) @ 2,250 RPM for takeoff. Increased supercharging, slightly higher compression ratio.

Propeller diameter: 2.85 m,

Propeller surface: 6.38 m ²

Climb rate 7.6 m/s,

Maximum speed at ground level: 342 km/h, 212 mph, 184.7 kts

<from a German site translated by yahoo>

echnical data: Pander S.IV Panderjager

Use: Long-distance post office airplane

Year of construction: 1933

Crew: 2-3 men

Engine: three air-cooled 9 cylinders radial engines WRIGHT R-975-E2 Whirwind with three-sheet variable-pitch propeller

Take-off power: 420 HP (310 KW)

Continuous duty: 395 HP in 4.000 m (292 KW)

Span: 16.60 m

Length: 12.50 m

largest height: 3.30 m

Propeller diameter: 2.85 m

Propeller surface: 6.38 m ²

Track width: 5.28 m

Wing area: 46.10 m ²

V-type: +5°

Empty mass: 3,210 kg

Takeoff weight normally: 5,150 kg

Takeoff weight maximally: 5,700 kg

Level of fuel in the tank: 1,090 litres

Surface loading: 123,6 kg/m ²

Power loading: 4,52 kg/PS (6.12 kg/kW)

Maximum speed at ground level: 342 km/h

Maximum speed in 4.000m: 364 km/h

Cruising speed in 4.000m: 300km/h

Ceiling: 6,050 m

Climbing achievement: 7.6 m/s

Climbing time on 1.000 m: 2.25 min

Climbing time on 4.000 m: 9.5 min

Range normally: 1,850 km

Range maximally: 3,240 km

Flight duration: 11 h

Armament: none

This information from the German site was the best it gave more detail.

Here is the problem

I can not get the prop speed up to the rated 2250 rpm. The Prop turns at 1,300 (about) RPM. Much like a Wings of Power aircraft this one preforms better with the prop pulled back to 75% than it does the prop full forward. That translates into about 1000 rpm.

The problem this causes is it takes a lot of runway to get off the ground at 100% prop. Almost all of a 9,000' runway. Now if you pull the prop back it takes off almost like I would expect it to if it were running at 2250 RPM.

I have been reading the Aircraft Container manual but it has not provided me any in site.

So even with this problem I have corrected the contact points, center of gravity, brakes, weight issue and if i get the prop fixed I have the speed and range issues figured out.

Something tells me that once I get the prop turning 2200 rpm that will blow all my speed and range numbers. :icon_lol:

Anyway so far it has been an enjoyable experience.

Any help is greatly appreciated

Dave

I collected data from as many sources as I could and for values I could not come up with real world numbers I did the next best thing. I looked at other similar aircraft from that period. I did not copy those values as much as I applied some SWAG to them.

For reference here is the real world data I collected.

<from various sites>

3 Wright Whirlwind R-975-E2 engines, 420 hp each.

Length 12.5 meters, 41.0 feet

span 16.6 meters, 54.4 feet

height 2.9 meters. 7.5 feet

Wing area: 46 sq. meters 150.9 feet

Empty weight: 3,441 Kilo's, 7 586.1 lbs

MTOW 5,736 kilo's, 12 645.7 lbs

Max speed 360 kmh, 223.7 mph, 194.4 kts

cruise speed 300 kmh, 186.4 mph, 162 kts

Landing speed 120 kmh, 74.6 mph, 64.8 kts

Ceiling 5,400 meters 17,716.5 feet

Range 2,950 kilometers, 1,833.0 miles, 1,592.9 nm

R-975E-3: 420 hp (313 kW) @ 2,200 RPM up to 1,400 ft (427 m), 450 hp (336 kW) @ 2,250 RPM for takeoff. Increased supercharging, slightly higher compression ratio.

Propeller diameter: 2.85 m,

Propeller surface: 6.38 m ²

Climb rate 7.6 m/s,

Maximum speed at ground level: 342 km/h, 212 mph, 184.7 kts

<from a German site translated by yahoo>

echnical data: Pander S.IV Panderjager

Use: Long-distance post office airplane

Year of construction: 1933

Crew: 2-3 men

Engine: three air-cooled 9 cylinders radial engines WRIGHT R-975-E2 Whirwind with three-sheet variable-pitch propeller

Take-off power: 420 HP (310 KW)

Continuous duty: 395 HP in 4.000 m (292 KW)

Span: 16.60 m

Length: 12.50 m

largest height: 3.30 m

Propeller diameter: 2.85 m

Propeller surface: 6.38 m ²

Track width: 5.28 m

Wing area: 46.10 m ²

V-type: +5°

Empty mass: 3,210 kg

Takeoff weight normally: 5,150 kg

Takeoff weight maximally: 5,700 kg

Level of fuel in the tank: 1,090 litres

Surface loading: 123,6 kg/m ²

Power loading: 4,52 kg/PS (6.12 kg/kW)

Maximum speed at ground level: 342 km/h

Maximum speed in 4.000m: 364 km/h

Cruising speed in 4.000m: 300km/h

Ceiling: 6,050 m

Climbing achievement: 7.6 m/s

Climbing time on 1.000 m: 2.25 min

Climbing time on 4.000 m: 9.5 min

Range normally: 1,850 km

Range maximally: 3,240 km

Flight duration: 11 h

Armament: none

This information from the German site was the best it gave more detail.

Here is the problem

I can not get the prop speed up to the rated 2250 rpm. The Prop turns at 1,300 (about) RPM. Much like a Wings of Power aircraft this one preforms better with the prop pulled back to 75% than it does the prop full forward. That translates into about 1000 rpm.

The problem this causes is it takes a lot of runway to get off the ground at 100% prop. Almost all of a 9,000' runway. Now if you pull the prop back it takes off almost like I would expect it to if it were running at 2250 RPM.

I have been reading the Aircraft Container manual but it has not provided me any in site.

So even with this problem I have corrected the contact points, center of gravity, brakes, weight issue and if i get the prop fixed I have the speed and range issues figured out.

Something tells me that once I get the prop turning 2200 rpm that will blow all my speed and range numbers. :icon_lol:

Anyway so far it has been an enjoyable experience.

Any help is greatly appreciated

Dave