I think that bears it out - again, OPS uses the word "Speed" much like Webra does, or like salespeople use the word "friend". It does not automatically mean high strung timing for balls-to-the-wall applications. I would call this a peppy engine but not radical. That said I have yet to see a 2-stroke glow OPS that disappoints. The box for this engine likely has a label that says 3.5 Speed RCA SLA = RC Air, SL = side exhaust, A = anterior (front) intake. OPS rates that engine at 0.7php at 19k, whereas the marine version (aka ducted fan timing) at 1.3hp at 27k. My carbed OPS .15 RCA SLA is turning a 6x5.5 prop at close to 23k static (so I guess around 24k in the air) and throttles as well as can be expected on an open pipe. This 3.5 ought to spin a 6-6 with authority. My .15 is built like a tank internally, I have no concerns about running it all day at that speed. I would imagine the two engines are set up similarly.

OPS's designation for a speed timed aero engine is VAE, hence the infamous .60 SPP VAE - SP = posterior (rear) exhaust, P = posterior intake, VAE = aero speed (perhaps velocitÃ* aria estrema?).