Ken Wallis is cited in Wikipedia as having climbed to 1000' in 56 seconds. That's in a single-seat gyro weighing 255 lb empty, he was probably about 150 lbs, and with 6 lbs of fuel that is 411 lbs TOW. IF it was 72 HP Mac, Horse power-to-weight ratio would have been .150, and with a 20.3' rotor disk loading 1.27# per SF.
Fartin' around 9/30/23 density alt. 1600' (CUB is 194' MSL), NR prop, WOT 9400 ERPM/ 140HP, I recorded a climb from a dead stop, zero AGL to 1000' in the Gunslinger in 57 seconds with my 18 lb. SS muffler, front seat backpack with junk in it, 30# of fuel, and pilot weight 200# dressed w/helmet. Gunslinger is 570 lbs dry, plus 16 lbs oil & water, so TOW ~816#, making that 1.72 HP/lb and 1.33 lb/SF disk loading.
I haven't found any 0-1000' gyro climbs listed yet any better than Ken's 1071 FPM, mine wound up at 1051 FPM and I know mine is better than Ken's if the run is weight-compensated, like how weight is added to saddles for jockeys racing thoroughbreds.
No other records have been kept for rotorcraft climbs outside of Europe which only has a time-to-climb to 3000 meters (~10,000 ft). I've never seen more than about 3500' in my time flying gyros, so the euro standard seems really excessive to me. Plus who's going to pack up their bird and drag it all the way to damn Europe just to mount a gyro climb record assault? Fk that.
It's way past time we had an AMERICAN standards, official, record for this thing! PRA hasn't done jack since they had one climb competition back in what, 2010. Bensen Days is even more lame-o, not one climb competition to date, Sally.
There are plenty of hotrod gyros flying in the USA, and with the Rotax 915 and next the 916 I, for one, would really like to see what these engines will do compared to any Mohawk Aero YG4 I've built: 140 HP Gunslinger (f.k.a. the Wicked) Air Command low rider tandem 2011, 165hp EXUP "Godzilla" (Geoff Resney 2019) Air Command Elite tandem; or 140 HP YG4 Air Command single (Kurt Carleson, 2015).
Yeah, OK, one guy with an Edge Performance turbo 912 154HP in a 670 lb AR-1 actually challenged me to a race at AFP in 2022, but we all know that top speed is all about big $$$, with the fastest, enclosed, ELA gyros costing $165,000+ dollars.
My Gunslinger Air Command tandem cost a grand total of $6000 to build.
Besides, top speed has never been the goal for me in a gyro. All I've ever been interested in with gyros besides flying below tree tops has been best climb - i.e., best power-to-weight efficiency. I told everyone here on RF that I was goign to try do it way back when I first started flying in 2006, and I accomplished that in 2011. But speed? Hell, I have no idea how fast my draggy, outdated, 1995 Air Command "low rider" with it's listed VNE of 90 MPH will go. I've never pushed it beyond 95 IAS with the 28' Dragon Wings, and never beyond 92 MPH with the original, red SkyWheels - where it started shaking like the dickens, and anyone trying to push it faster than that would have been asking to get their ticket punched and check out. Nope, I may never know my gyro's top speed, and could not care less.
In fact, Meghan Trainor wrote a song about this in 2013:
"Because you know I'm all about that climb
'Bout that climb, no speed
I'm all about that climb, 'bout that climb, no speed
I'm all about that climb, 'bout that climb, no speed
I'm all about that climb, 'bout that climb (climb, climb, climb, climb)"
Barnstormers 2024. Gitterdun.