HTR - Helicopter Total Realism

Yes, free. And yes, that good.

What HTR does is process dozens of user-defined parameters and make forces act upon your aircraft in a realistic matter. HTR uses Fred Naar's own physics library, which took him quite some time to develop and tweak making it one of the most complete and accurate pieces of code for helicopter flight simulation physics.

This is a companion discussion topic for the original entry at

Seems like is not maintained anymore, maybe you can update the link.
there was a mention of a standalone simulation by the creator of HTR, any news on that?

Hello there. I have removed the link. Thank for the heads up.

All we know about Fred Naar’s project (that we can publicly talk about) is here:

There are some more news coming our way but that will take some time as there are a lot of new things going on in the background.

Thanks Sergio!

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Anytime. I can tell you the news are exciting. Can’t talk about it but it’s cool stuff!