Are NiMH packs an appropriate choice for Giant Scale applications?
Certainly! Modern QUALITY NiMH packs are every bit as durable and reliable as any Nicad system. Since their internal impedence in some types can be a stumbling block, using a 5 cell system can overcome the voltage drop associated with bigger bird servo loading. Just as with Nicads, you should select a low impedance cell for your Giant Scale Warbirds and IMAC planes. It certainly would be appropriate to use a 5 cell, 6v arrangement to more safely accommodate the higher control surface flight loads while providing additional servo power and improve transit speeds and Rx voltage security.