Tyres/brake temperature simulation

[Will]

Remote control is easily done, one just needs to find people willing to be check airmen, and people willing to be tortured! (For that matter, we could also have two crewmembers, one left seat and one right seat, and an instructor... each on a different continent.)

[John H Watson]

What about the strut compression in your formula? A part of the opposite weight sits on the nose wheel, relieving a bit on the low side, so that strut expansion on the low side has less work to do to keep the low wing up.

I was erring on the low side because of a possible nose gear effect. Having said that, the bad side is still supported by the naked wheel rims... There will be still the same amount of strut extension (It's not the same situation as an un-extended gear). As far as I can see, there would be very little difference in weight on the struts: A degree lower on one side might push the CG a tiny amount to the bad side (trigonometric effect, slightly offset by the nose gear support)? In terms of pure weight, the nose gear bears a very small percentage of weight compared to the main gear (hence 2 tyres vs 16 tyres)

I'm wondering what effect fuselage bending (twisting) would have on angles. What happens at the main gear isn't always what happens at the nose gear station (closer to where the IRUs are measuring roll angle). Is the nose gear wheelbase sufficient to resist a turning effect due to flat main gear tyres (even when the fuselage is unpressurised and less rigid)?

Anyway, there are probably an infinite number of height/angle variations due to flat or partially inflated/damaged/worn tyres (I'm sure not even Boeing would worry about stuff like this... probably some runways even slope a degree or two one way or the other  ).

[G-CIVA]

Hardy,

Brake heating during taxi before take off & after landing with 10.0.7 Beta 10 seemed to produce results more akin to what I have been used to before.

I did monitor the brake temperature maxima indications via Instructor > Analysis > Miscellaneous on one of my clients just for interest....

After landing & on a rainy night in Taipei with a landing weight of 243t & a Flap 25 V REF of 147 kts into a blustery 12 kts of headwind with an OAT of 17'C with Autobrake 3 set the brake temperature maxima indication rose to about 170 as I applied manual braking at about 50kts ground speed with partial reverse reduced to idle reverse passing 80kts.

The BTMS on the Gear Page on the Lower EICAS showed '1' shortly after turning off the runway & the brake temperature maxima indication increased to approx. 190 before settling down to approx. 160 in the final turn to the gate.  About 5 mins after engine shutdown the BTMS was still showing '1' & brake temperature maxima indication was slowly decreasing through 140.

Bravo!

Steve

[Britjet]

I'm not sure if I can fail all the tyres on one side in the sim but I can have a go this weekend..
Peter

No luck - I could only fail a few of them - what did fail though, did give the impression of a very slight roll.
Probably less than 1 degree. I will try and look into it further, as well as the tyre pressures..

Peter