Answer
Maɓuɓɓugan ruwan raƙuman raƙuman ruwa, waɗanda suka ƙunshi jujjuyawar rauni a layi daya, suna nuna madaidaicin madauki yayin lodawa da zagayawa. Wannan yana faruwa da farko ta hanyar juyi-juyawa. Jimlar kaya $P_{total} = P_{theoretical} \pm P_{friction}$. A lokacin bugun jini, juzu'in da ke tsakanin coils yana ƙaruwa da yanayin bazara, yayin da lokacin dawowar bugun jini, juzu'i na adawa da ƙarfin dawo da bazara. Don maɓuɓɓugar ruwa mai jujjuya $n$, ƙimar ka'idar shine sau $n$ na juyi ɗaya: $K_{nested} = n \cdot \frac{E b t^3 N^4}{I D_m^3}$. Koyaya, dole ne injiniyoyi suyi lissafin $3\%$ zuwa $5\%$ bambancin kaya saboda gamawa da man shafawa. A cikin bawuloli na cikin teku, inda ake amfani da SAE 1070 carbon karfe ko Inconel X-750, ƙimar juzu'i $\mu$ yana canza madaidaicin $P-f$, yana buƙatar daidaitaccen sifa don guje wa lagwar actuator.
