Landing Rate Calculator
4 years 6 months ago #16045
by KC135
Landing Rate Calculator was created by KC135
I have a Landing Rate Monitor that I monitor my landings. It seems that landing rates reported are at times different with SPA Acars. I can understand a little difference, but my flight to KSNA was reported to be -910 fpm. That was a very damaging landing. I did no bounce or had no violent reaction in the aircraft. The Landing Rate monitor was -212 fpm, firm but not nearly as severe as SPA indicates. What happened here?
Please Log in to join the conversation.
4 years 6 months ago #16047
by jer029
Replied by jer029 on topic Landing Rate Calculator
SPAACARS samples the landing rate at regular intervals and keeps the final value when it detects a landing. It's possible that you pulled up in the short time span between samplings and touchdown and ended up with a softer landing than indicated by SPAACARS. SPAACARS cannot sample after the landing of course because the landing rate is 0 then. It also must retain the last sample taken when wheels-down is detected to avoid detecting bounce as the landing rate. The more sampling SPAACARS does, the more resource intensive. This seems to be a workable arrangement if you don't rocket to the ground with an extreme flare at touchdown.
It's the best I could do at the time I wrote the program.
John<br /><br /><!-- editby --><br /><br /><em>edited by: jer029, Jun 30, 2020 - 01:23 PM</em><!-- end editby -->
It's the best I could do at the time I wrote the program.
John<br /><br /><!-- editby --><br /><br /><em>edited by: jer029, Jun 30, 2020 - 01:23 PM</em><!-- end editby -->
Please Log in to join the conversation.
Time to create page: 0.064 seconds