Show AIRSHIPS GOOD GOODIN IN LIGHT WINDS In a Strong Wind However the Best of f Them Would Be Driven Backward Berlin Borin Oct 6 The science of aerial nav nay navigation navIgation at least In Germany German has reached a point where many man of the most prominent Investigators are re asking themselves In which direction they shall pursue their ex experiments experiments experiments The problem of ot steering Is sat satisfactorily satIsfactorily satIsfactorily solved but there remains the important question of the conquest of the I I contrary currents of the air and this raises the Issue between the advocates of at lighter than the air and heavier than the air I Balloons Inflated with gas are generally generall regarded here as having nearly if not quite attained the final stage of ot their pos pea possibilities possIbilities which as Is contended although marvelous In comparison with the position position position tion of only five years y ars ago still leaves much to be achieved before the air can be said to be bo mastered Restricted to Light Winds All three systems the rigid the semi rigid and the flexible representing respectively respectively the tho balloon of Count Sep the German aeronaut the military balloon and that of ot Major von have been and still are being tested All have given evidence of DC the fact that In light winds and otherwise favorable tavor ble weather they may be steered and maneu mane maneuvered maneuvered vered with great facility Not one of them however how ver has on any occasion ven yen ventured into the air when a strong wind was s blowing for the good reason that their steersmen are aware that their weak mo motive tire tive power would not permit progression The greatest speed attained by any of ot them and this applies also to French bal balloons balloons loons loans has not exceeded In round figures miles an hour and at that rate in such a wind they the would be driven backward Even Een ven the Zeppelin which Is credited with a speed of or thirtyfour miles an hour would do little littlemore littlemore littlemore more than lImIt hold its own Cigar Shape Shap Favored As to form forD tho cigar shape maintains Its ts favor but the manner of construction on which it Is Ia I argued depends the capacity cap of ot the balloon to remain in the air Is var varIed varied ed In Zeppelins balloon ballo the envelope envelopes is s entirely of ot aluminum covered with silk and rubber In the military airship the tM th lower ower portion of f the main body of or the main envelope Is of ot metal covered with silk and rubber the ends and the Upper portion being of ot ordinary balloon material m while balloon Is s entirely com composed composed posed pOlled of ot flexible tle ible material m similar to that t at atu used u d in spherical 1 balloons I I The voyage of the and ana mili military tary balloons as well as us the tile French air airships airships airships ships all aU of at which are either or flexible have been limited to slightly over three hours houa owing to t the forward end of at atthe the he envelope gradually collapsing through the he escape of gas thus presenting a con concave concave cave care surface surf ce to the direction In which the he balloon is steered and preventing fur furher further her thier progress Count Zeppelins Airship On the other hand the Zeppelin Zepp even e ev n nI after the escape es ape of a considerable quan tit thy ity of gas retains its shape arid and is able to o proceed Count Zeppelin asserts that he can attain a velocity of about thirty thirtyfour four our miles an hour with the motor work worl workIng lug Ing ng at full fuJi pressure His Ills further trials are waited awaited with the greatest interest for wIth such a speed according to meteoro meteorological l logical averages which shows that on op ninety days out of every tOO I the wind vind does not ot exceed thirty miles an hour It would be e possible to ascend and and navigate against It t almost dally daily The Tho navigable balloon would be able abl to pass pas over oyer an camp amp without running much danger as owing wing to Us its construction In twelve or r thirteen compartments each entirely sep separate separate arate rate from the others even should such compartments be pierced by shot and col coi collapse lapse apse the metal envelope would not Ilot change hange its shape and anti the voyage could be continued Military Balloon The other dirigibles do not possess this advantage The rhe military balloon is built on n the lines of the Patria the envelope being eing composed of only one compartment The balloon at present in use which con contains contains ains cubic cu lc metres of ot o gas is II intend Intended ed d only as a model for tor larger larer airships In InI I I I I case the authorities decide to t adopt th the I system The balloon which has shown such wonderful power of at navigation lon In calm weather has some gome of ot the same dis disadvantages disadvantages advantages as the military balloon In Inthe 1 the envelope containing the gas being l fixed two one in front the theother theother other in the rear which when one or the theother th theother other Is pumped full tull eft ft air by the th motor change the equilibrium and permit the balloon to ascend or descend In oblique di directions directions directions The envelopes hold cubic ruble metres of ot gas The only serious s German GenTIan experimenter until now with flying machines heavier than the air is Herr Karl K of Hanover He tIe has constructed a remark remarkable remarkable remarkable able aeroplane plane composed of six sails a horizontal steering sail a horizontal main mainsail maInsail mainsail sail two wo vertical fixed sails and two ver vertical vertical vertical steering sails a wind propeller and anda a basket of or o platform carrying a power motor The equilibrium eq of ot the aeroplane is maintained by the horizontal steering sail which controls the raising or lowering of the forepart of the ma machine m mI machine chine Should the motor cease working from t rom accident or other oth er cause the mainsail is large and strong str ng enough to act as a parachute |