| Der Donnerschlag | |
|---|---|
| Role | Homebuilt aircraft |
| National origin | United States |
| Manufacturer | Harmon Engineering Company |
| Status | Production completed |
| Variants | Harmon Mister America |
The Harmon Der Donnerschlag (English: Thunderclap) is an American homebuilt aircraft that was designed and produced by Harmon Engineering of Howe, Texas. The aircraft was intended for amateur construction.[1]