Crann-togail

Is e a tha ann an crann-togail inneal airson togail stuth gu h-àrd. Aig a' char as simplidh, is e a tha ann an crann togail, ach crann laidir claonta, air an cumail suas le stughan. Bithidh ulag aig ceann na cruinne, inneal-tachrais aig a bun, agus ropa sinte bhon inneal-tachrais, tro an ulag ri dubhan a bhitheas ceangailte ri ceann an ropa.

Nuair a leigeas an t-inneal tachrais an ropa a mach claonaidh an dubhan. Togar eallachan nuair a chrochar iad air an dubhan mus am bithidh an inneal tachrais a tarruinn an ropa a-steach, agus an eallach suas 's an adhair.