Climb & cruise speeds vis-a-vis RL footage of Jim Savage's Spartan

Hello,

to support my feedback regarding the flight model with some concrete numbers, I ran few tests for climb and cruise performance.

Climb

As per available resources from Jim Savage including his video below, the climb profile should look like this:

• 32.5'' MP
• 2000 rpm
• 1000-1500 ft/min climb
• resulting in ~100 kts climb speed.

However, if the iniBuilds Spartan is let to speed up above some 130 kts after take off, the speed starts increasing rapidly resulting in climb speed of almost 190 kts with the engine parameters set as above.

Cruise

Jim Savage's video below shows his cruise profile as follows:

• 26'' MP
• 1900 rpm
• 8500 ft altitude
• resulting in ~140 kts cruise speed.

However, the iniBuilds Spartan ends up cruising at nearly 190 kts under the conditions above:

As mentioned in my feedback related to the flight model, it looks like the problem is related to the fact that once the speed builds above some 130-140 kts, it sort of becomes uncontrollable and the aircraft usually settles to about 180-190 kts in climb or cruise with the power setting not having much of an impact on it.

Will you please have a look into this?

Thank you.

Edited May 11, 2025May 11 by apollon01