Zeppelin Staaken type 8301 Seaplane
role : maritime patrol, ASW
first flight : operational : August 1918
country : Germany
design :
production : 3 aircraft
general information :
Not used operational in WWI. After WWI it flew from the Havel lakes near Berlin to Swinemunde at the Baltic sea cost, carrying passengers.
users : Luftwaffe
crew : 5 passengers : 24
armament : 5 movable 7.92mm machineguns
engine : 4 Mercedes D.IVa liquid-cooled 6 -cylinder inline engine 260.0 [hp](191.2 KW)
high compression engine : cannot run at full power at sea level, constant power to height : 1350 [m]
dimensions :
wingspan : 42.2 [m], length : 21.0 [m], height : 6.8[m]
wing area : 340.5 [m^2]
weights :
max.take-off weight : 12500 [kg]
empty weight operational : 9000 [kg] useful load : 2100 [kg]
performance :
maximum speed : 130 [km/hr] at sea-level
service ceiling : 3500 [m]
endurance : 10.53 [hours]
estimated action radius : 616 [km]
description :
4-bay two float biplane airscrew :
two fixed pitch 2 -bladed tractor airscrews and two fixed pitch pusher propellor with max. efficiency :0.64 [ ]
estimated diameter airscrew 4.30 [m]
airscrew revs : 1083 [r.p.m.]
pitch at Max speed 2.00 [m]
blade-tip speed at Vmax and max revs. : 246 [m/s]
calculation : *1* (dimensions)
mean wing chord : 4.03 [m]
calculated wing chord (rounded tips): 4.28 [m]
wing aspect ratio : 10.46 []
estimated gap : 3.93 [m]
gap/chord : 0.97 [ ]
seize (span*length*height) : 6026 [m^3]
calculation : *2* (fuel consumption)
oil consumption : 17.5 [kg/hr]
fuel consumption(cruise speed) : 221.0 [kg/hr] (301.5 [litre/hr]) at 87 [%] power
estimated specific fuel consumption (cruise power) : 332 [gram/kwh]
estimated specific oil consumption (cruise power) : 23 [gram/kwh]
distance flown for 1 kg fuel : 0.53 [km/kg]
estimated total fuel capacity : 3603 [litre] (2641 [kg])
calculation : *3* (weight)
weight engine(s) dry : 1698.1 [kg] = 2.22 [kg/KW]
weight reduction gear : 42.1 [kg]
weight 266 litre oil tank : 22.6 [kg]
oil tank filled with 5.7 litre oil : 5.2 [kg]
oil in engine 43 litre oil : 38.2 [kg]
fuel in engine 5 litre fuel : 3.8 [kg]
weight 128 litre gravity patrol tank(s) : 19.2 [kg]
weight radiator : 114.7 [kg]
weight exhaust pipes & fuel lines 38.3 [kg]
weight self-starter : 4.7 [kg]
weight cowling 7.6 [kg]
weight airscrew(s) (wood) incl. boss & bolts : 114.7 [kg]
total weight propulsion system : 2129 [kg](17.0 [%])
***************************************************************
fuselage skeleton (wood gauge : 18.09 [cm]): 1759 [kg]
bracing : 260.5 [kg]
fuselage covering (doped linen fabric) : 26.7 [kg]
weight controls + indicators: 13.5 [kg]
weight seats : 15.0 [kg]
weight other details, lighting set, etc. : 17.1 [kg]
weight bomb storage : 7.0 [kg]
weight four 869 [litre] main fuel tanks empty : 97.7 [kg]
weight interior + equipment + fuel lines: 159 [kg]
weight 6 fire extinguishers : 42 [kg]
total weight fuselage : 2398 [kg](19.2 [%])
***************************************************************
weight wing covering (doped linen fabric) : 218 [kg]
total weight ribs (253 ribs) : 743 [kg]
load on front upper spar (clmax) per running metre : 1896.1 [N]
load on rear upper spar (vmax) per running metre : 951.0 [N]
weight engine mounts : 38 [kg]
total weight 8 spars : 696 [kg]
weight wings : 1657 [kg]
weight wing/square meter : 4.87 [kg]
load on front upper spar (clmax) per bay : 10001.8 [N]
weight 16 interplane struts & cabane : 731.9 [kg]
weight cables (290 [m]) : 365.5 [kg] (= 1261 [gram] per metre)
diameter cable : 14.3 [mm]
!! fin surface x 1.25 to counteract floats
weight fin & rudder (25.8 [m2]) : 129.6 [kg]
weight stabilizer & elevator (38.3 [m2]): 188.9 [kg]
total weight wing surfaces & bracing : 3111 [kg] (24.9 [%])
*******************************************************************
weight machine-gun(s) : 77.1 [kg]
weight ring mounting mg :20.0 [kg]
weight ammunition magazine(s) :5.7 [kg]
weight armament : 103 [kg]
********************************************************************
wheel cycles : 224
wheel density : 511 [kg/m3]
weight floats : 793 [kg] (6.3 [%])
*******************************************************************
********************************************************************
calculated empty weight : 8533 [kg](68.3 [%])
weight oil for 12.6 hours flying : 221.3 [kg]
weight cooling fluids : 165.2 [kg]
weight ammunition (2500 rounds) : 87.5 [kg]
weight signal pistol with cartridges : 3.6 [kg]
*******************************************************************
calculated operational weight empty : 9011 [kg] (72.1 [%])
published operational weight empty : 9000 [kg] (72.0 [%])
_____________
| | | |o| | | |
-------------
= =
weight crew : 405 [kg]
weight fuel for 2.0 hours flying : 442 [kg]
********************************************************************
operational weight : 9858 [kg](78.9 [%])
bomb load : 100 [kg]
operational weight bombing mission : 9958 [kg]
fuel reserve : 2199 [kg] enough for 9.95 [hours] flying
possible additional useful load : 343 [kg]
operational weight fully loaded : 12500 [kg] with fuel tank filled for 100 [%]
published maximum take-off weight : 12500 [kg] (100.0 [%])
||
||
||
||
calculation : * 4 * (engine power)
engine total stroke volume (displacement): 21.7 [litre]
mean engine pressure : 27.44 [kg/cm2]
compression ratio : 4.98 : 1
power loading (operational without bombload) : 12.89 [kg/kW]
total power : 764.9 [kW] at 1444 [r.p.m]
power / stroke volume : 8.8 [kW/litre]
Although not officially accepted for naval service, the display of its marine number shows that this Staaken R (Riesenflugzeug) was ordered by the Navy and completed before the conditions of the Treaty of Versailles came into effect. This machine shows the stage the Germans reached in the development of the giant twin-float seaplane by the end of hostilities. It was operated for a period on a regular basis, from the large lakes between Potsdam and Berlin to Travemiinde, taking Berliners to the seaside in what must have been the first holiday air traffic charters from that city.
calculation : *5* (loads)
manoeuvre load : 2.4 [g] at 1000 [m]
limit load : 2.5 [g] ultimate load : 3.8 [g]
design flight time : 7.37 [hours]
design cycles : 224 sorties, design hours : 1650 [hours]
operational wing loading : 284 [N/m^2]
wing stress (3 g) during operation : 175 [N/kg] at 3g emergency manoeuvre
calculation : *6* (angles of attack)
angle of attack zero lift : -1.10 ["]
max.angle of attack (stalling angle) : 13.11 ["]
angle of attack at max.speed : 2.85 ["]
calculation : *7* (lift & drag ratios
lift coefficient at angle of attack 0° :0.10 [ ]
lift coefficient at max. angle of attack : 1.29 [ ]
lift coefficient at max.speed : 0.36 [ ]
induced drag coefficient at max.speed : 0.0070 [ ]
drag coefficient at max.speed : 0.0502 [ ]
drag coefficient (zero lift) : 0.0432 [ ]
calculation : *8* (speeds
stalling speed at sea-level (OW): 68 [km/u]
landing speed at sea-level (OW without bombload): 82 [km/hr]
min.power speed (max endurance) : 89 [km/hr] op 1645 [m](power :51 [%])
min. drag speed (max range) : 117 [km/hr] op 1645 [m] (power:72 [%])
max.rate of climb speed : 82.4 [km/hr] at sea-level
cruising speed : 117 [km/hr] op 1645 [m] (P:550.1 [KW])
design speed prop : 124 [km/hr]
maximum speed : 130 [km/hr] op 100 [m] (P:765 [KW])
climbing speed at sea-level (without bombload) : 137 [m/min]
calculation : *9* (regarding various performances)
take-off distance at sea-level : 364 [m]
lift/drag ratio : 10.34 [ ]
practical ceiling : 4925 [m] with flying weight :9858 [kg]
climb to 1500m (without bombload) : 10.93 [min]
climb to 3000m (without bombload) : 23.96 [min]
published ceiling (3500 [m]) vmin : 81.3 [km/hr] vmax : 127.4 [km/hr]
max.dive speed : 434.3 [km/hr] at 3925 [m] height
load factor at max.angle turn 1.78 ["g"]
turn radius at 500m: 47 [m]
time needed for 360* turn 11.3 [seconds] at 500m
calculation *10* (action radius & endurance)
operational endurance : 11.95 [hours] with 5 crew and 443 [kg] useful (bomb)load and 100.0 [%] fuel
published endurance : 10.53 [hours] with possible useful (bomb) load : 757 [kg]
action radius : 811 [km] with 5 crew and 20[kg] photo camera/radio transmitter or bombload
max range theoretically with additional fuel tanks for total 4774 [litre] fuel : 1853 [km]
useful load with action-radius 250km : 2555 [kg]
production : 298.93 [tonkm/hour]
oil and fuel consumption per tonkm : 0.80 [kg]
_
====
Literature : Jane’s fighting aircraft WWI page 194
piston-engined airliners page 10
(c) B van der Zalm 03 June 2018 python 3.4.1
>>>