| Show POLE BY 0 sa WILL MADE BY NOTED EXPLORER particulars of the daring venture in contemplation craft to be employed prospects of success mr walter wellman that notable explorer and journalist who has twice gone to the arctic region in attempts to reach the north pole expects to start from bergen the first ol 01 august on a third expedition which will travel agh the air in the largest dirigible balloon ever built the envelope of the balloon is being constructed by louis goddard of par is it is to consist of two layers of rubber covered cotton and one layer the inside one of rubber covered silk in its central zone which is the strongest the envelope is to have a tensile strength of 2 kilo grammes per square meter about pounds per square foot thus giving a factor of safety of 6 to 1 the average fac tor of safety is five to one as against to one of the lebauda airship the form of the balloon Is to be main bained by an interior bal lonette filled with compressed air by means of a five horse power motor and compres or on account of the triple rubber layers which are lapped one inch at the and sewed together and the stitching then covered with cemented strips the leakage of gas is guaran teed not to exceed 1 per cent per day the amount of fuel and supplies consumed dally will more than coun ter balance this the length of the gas bag will be 50 meters 04 feet its greatest diameter 16 meters 54 49 its surface 1960 square meters 21 square feet its capacity cubic meters cubic feet and its lifting power with gas having a lifting power of 1130 grammes per cubic meter 7 kilo grammes or pounds the weight of the balloon is 2 pounds while the framework steel car motors and all other para pher nalia bring this up to a total of 7 pounds this leaves an avail able lifting power of 8 pounds tor the crew of five men three or tour motor sledges a metallic boat and all supplies says the scientific american the airship is to have two tour cylinder water cooled gasoline motors of 55 and 25 hore power the larger motor drives a forward propeller through reduction gearing and the smaller one a propeller at the rear in the same manner A speed of 15 miles an ho ir will be obtainable with the 55 horse power motor and 19 miles an hour with both the total distance to be covered is about 1 miles while the 5 pounds of gasoline to be car ried should drive the airship nearly twice this distance this fuel 1 suf for a hour run of the main motor should one motor break down be yond repair the travellers trav ellers can use the other one and if the airship gives out from any cause the travelers can take to the s edges A wireless telegraph outfit Is to be taken along so that communication can be maintained with the bae as long as possible at a meeting of the new york mo tor club on march 23 mr wellman ex fully his plans for the trip and showed how he has tried to pro vide for every contingency the air ship is to be transported to gen inflated there and experimented with during the month of july if everything works satisfactorily the dash will be made in august and pro visions will be carried sufficient for 75 days everything has been so care fully planned by mr wellman who has an intimate knowledge of what is required tha the expedition through the air lf not altogether successful bids fair to be by no means a dismal failure |
