General Category > Unofficial F/A-18 Acceleration Pack board

Sludge Hornet Modifications

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Razgriz:
Also, on another note, the HUD will never be nearly as big as the HUD frame allows, which for some reason everyone gets wrong.

Paddles:
And I also noticed that T-45's HUD TCN readings never drop below 0.2  ;)

Razgriz:
I'd like to see videos where the T-45 drifts to the right of the runway.

SUBS17:
Nice video Sludge the shot of the Hornet going through the clouds was quite cool.

SpazSinbad:
RazGriz commented above: "... the biggest difference that led me to making this post is that the T-45s optimal AoA for landing is 17 units.  A whopping 17 units." Units are not 'degrees of angle of attack' usually units are relative to the Optimum Angle of Attack - the be all and end all of carrier aviation.

I'll check the Hornet NATOPS but I think recall that the Opt AoA unit is also approx 17. Without looking at all the USN aircraft NATOPS for this info I would assume that today and in recent past (for example A-4 is 17.5 UNITS for Opt AoA) for standardisation purposes all AoA information is in units that are relative to the Opt AoA which is around 17. A-4 NATOPS says that the gauge is not calibrated either so any UNIT above or below Optimum is arbitrary also. The main point of the indexer is Optimum. Probably today the Hornet/Goshawk have more accurate AoA indications for cruise control at altitude. Anyway I digress - below is relevant T-45C info. Graphic will follow.... In the meantime attached are some pages from the T-45C NATOPS about AoA and how it is used.

From T-45C Goshawk NATOPS:

"AOA Indicator.
The AOA indicator functions throughout the entire flight regime to display AOA information, see Figure 2-38. The indicator registers units of AOA to the relative airstream, from 0 to 30 units. An OFF flag is visible if electrical power is lost. The indicator is set with the optimum unit setting at the 3 o’clock position.

AOA Indexer.
The AOA indexer, located on the glareshield in both cockpits, consists of three indexer lights; the upper chevron (e) is green and indicates a high (=18 units) AOA, the center donut (O) is amber and indicates the optimum (17 units) AOA, and the lower chevron (d) is red and indicates a low (=16 units) AOA. Two intermediate conditions are also indicated by illuminations of the donut (O) with the upper or lower chevron."

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