Tow plane types/mods for high density altitude glider towing

On Tuesday, August 13, 2019 at 1:42:14 PM UTC-6, wrote:
On Tuesday, August 13, 2019 at 2:57:24 PM UTC-4, Frank Whiteley wrote:
On Monday, August 12, 2019 at 7:38:43 PM UTC-6, son_of_flubber wrote:
What are your favorite aircraft types (and modifications) for glider towing in high density altitude and/or short runways?

Mark Keene once told me about towing with one of these at Uvalde making a 2000ft tow and return in under three minutes. https://en.wikipedia.org/wiki/SIAI-Marchetti_SM.1019

28 variants on the US registry.

Frank Whiteley

I towed behind Mark in my '28. We had 2000 feet in 1:40. He told me he was using 40% power.
UH

Now that I think about it, I believe Mark said his tow cycle time was 2.5 minutes. Must have been an interesting view from the glider;^)

Frank