Howard Mr. Mulligan DGA6DGA6 Mulligan airplane model. Mr. Mulligan is still considered, by many, the fastest cabin monoplane that was ever built. Until it's unfortunate accident in the southwest, "Mulligan" was used by Ben and his wife as a high speed transportation craft to promote Howard planes. The Mr. Mulligan was designated a DGA6 for "Darn good airplane" sixth version. This just might be an understatement considering the success of the plane. The DGA6 had a span of 31