I did some testing to establish a few speeds with DE Stubby. Stall was around 45. I don't have my notes here, but best climb rate, best climb angle, lowest rate of descent all were around 60 mph, give or take a few. The specific number will vary with aircraft due to airspeed indicator installation, for one reason. For example, we had the static lines "Teed" to static ports on either side of the fuselage aft of the cockpit, but saw a lot of fluctuation of the airspeed indicator. Then we simply disconnected the "T" behind the seats and left it open. This calmed the airspeed indicator, but it indicates 5-8 mph higher like this.
My recommendation on initial testing is to keep the airspeed on the high side (but way less than 103 mph!) during climb until you get some feel for it.
