Id. german aircraft

[Denniss]

He 172 had NACA fairings and other changes, Townend fairings were used to increase performance of standard He 72s. I have seen claims of 10-20 km/h more level speed

[Sturm78]

Thanks, Denniss

I have read that the He 172 did not go into production due to the minimal gain in performance compared to the normal He 72....so I guess that a He 72 with Townend engine fairing It would not improve much compared to the standard He 72 either.....

Sturm78