First simulation, using the Interceptor-E file, shows the following:
Altitude -- 490'
Deployment V -- 4 FPS
Rod length -- 60" (took 56")
This is the killer 
Using the new graph, as Jerry indicated, the engine is "soft". It appears great, once the model is airborne, but getting off the ground it doesn't have a lot of "oomph" when used in a design that weighs in over 13 oz loaded.
I also tried it out in the SEMROC SLS Laser-X...
Altitude -- 554'
Deployment V -- 4 FPS
Rod length -- 60" (took 49")
This is a 12.5 oz design loaded, and shows great flight numbers, but lousy take-off numbers.
Another test, this time the DynaStar FireFox-SHX...
Altitude -- 643'
Deployment V -- 15 FPS
Rod Length -- 60" (took 47")
This is the lightest of the three, at 11.32 oz loaded. Still weak on the take-off...
Haven't simulated a Cherokee-D yet, but I expect better lift-off numbers. This engine should not be viewed as a serious BOOST engine for heavier designs; rather as a higher-performance "D" for light designs (3FNC and 4FNC variety).