springald
springald is a torsion siege engine or tension artillery.
Also recorded as espringal.
In detail
springald is a torsion siege engine or tension artillery.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Springald”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1261384: springald
Consult the source