Kanandi ŵakusintha viseŵero vya mphepo pa mtunda wa makilomita 10,000 panji 20,000 panji myezi 6 panji chaka chimoza. Mu malo ghakofya (nga ni fuvu na smog), ivi vikwenera kufupikizgika kufika pa makilomita 8,000 mpaka 10,000 panji myezi yinkhondi na umoza. Pa misewu yikuruyikuru, ichi chingasazgikira kufika pa makilomita 30,000.
Nyengo yakusinthira sefa ya mphepo yikwenera kumanyikwa mwakuyana na malo agho ndege yikugwilira ntchito na umo ndege yikuŵira. Kulingana na ivyo vikuyowoyeka mu sefa ya mphepo ya Dongfanghong ME454 (mtundu wakuuma - wakusintha chinthu cha sefa, kapangidwe kakwamba), kapangidwe kake ka sefa kakunjilirapo makora pa fuvu. Kweni, pa nyengo yitali-kunyamura -kugwira ntchito panji mu malo gha fuvu, nchakwenelera kuti muwoneseske chinthu cha sefa kuti chiwone usange fuvu likuwunjika pa maora 500 panji myezi yitatu yiliyose. Usange pepala la sefa likufipa panji mphepo yikuchepa, likwenera kusinthika nyengo yeneyiyo. Sefa ya mphepo yakwamba iyo tikupereka yili na chisulo chakuyimilira icho chikwenelera chiyelezgero cha 454. Sefa iyi njambura kusuzga kuyiŵika ndipo yikwiza na chipewa cha sefa ya mphepo kuti yileke kunjilirapo pa vinthu vikuruvikuru. Pakuti SG604 tractor mphepo sefa msonkhano (na supercharger ntchito), pakuti buku la injini ndilo likuru, nchakukhumbikwa kuti muwoneseske maora 300 panji myezi 2 yiliyose.
