Show vu NEW MAIL PLANE CUTS TRAVEL COST COS i NEW W lORK lORlI Jan An 17 17 An aIr al mali mail plane pIano with a 0 capacity ae seon en times that of oC vehicles now nos In use Ue us has just completed successful night flight tests at the tho hands of at atthe oth the postoffice Clarence D 7 I Cham- Cham Chambel in bel hn chairman of at an aerial ess service it St t before heights N J testified today be- be be before I fore tore the tho congressional sub com subcommittee In the nations nation s military and commercial air lr reo cc- re resources sources I Tho The new an raft said alj Mr Cham- Cham berlan Chamberlan Chain uses a II standard Liberty motor and with an ed body and wing wine structure promises to cut tho cost co t of at air mall trans Irani- transport port 2 63 3 per ton mile to 3 Gc per ton mile as us compared with aith an estimated east cost of at about for tor or similar seT service seTIco Ico b land truck truc Tho witness lines the mi- mi proved mall mail ship as a combination tion of at features which It to descend at low speeds and by steep angles to glide elide great greot ills ills- distance dl tance In case of ot motor e and to 10 maintain a speed of at 13 miles an hour It had a II a safety lnor more than an craft crall now In use ue said aid Mr in Chamberl-in Toda Tod s i milon K-milon of at the sub corn sub com mitte hereIt concluded Its hearings hearing here It will bo be resumed at next t Mondy and unless the ap- ap appeal ap appeal peal anco o of Important new wit witnesses sit sit- It- It nesses I his la return mum to New Nework Ork ark ork for tor an additional test a t will III be ready for tor congress by I 13 I Dr George at n Russian Ru l n in Inventor antor to the th sub corn sub motion pictures o of the tue zit helicopter In helping to de tode clop which l th the I spent and ond as be by aIrplane I 00 oo |