airsuperiority
Captain
preparing to invade galaxy by first getting himself used to planets with o2 atmosphere
J-20... The New Generation Fighter III
- Thread starter siegecrossbow
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preparing to invade galaxy by first getting himself used to planets with o2 atmosphere
Engineer
Major
What exactly is the use of lenses in the first place on hmds? I always assumed it was to do with night vision projection, with the actual info projected onto the visor..? Hmm I don't know
My guess is collimation of the beam (making the light rays parallel), so that the pilot perceived the projection to be at infinite distance.
plawolf
Lieutenant General
What exactly is the use of lenses in the first place on hmds? I always assumed it was to do with night vision projection, with the actual info projected onto the visor..? Hmm I don't know
But I think we can be confident j-20 will feature an advanced hmd. My hope is they have a refit in place for older fourth gen aircraft like jhmcs, to be put on existing helmets.
This is an example of what kind of information you will find on a relatively advanced HMD in service today. So you are looking at things like the Israeli Dash 2 or US JHMCS.
The following is a good guide showing what all the information represents.
So basically it projects all the information you would normally expect to see on you HUD onto the lenses in front of your eyes so you have access to all that data no matter where you are looking.
It is only with the F35 HMDS that you are getting towards the level you are suggestion, with live video from things like the IRST feeding directly into your HMD and projecting over the real world. As this final image shows.
As with the HUD, the bigger the lenses, the better, as you can put more information onto it without it all getting jumbled up. So the very small lense you see on early J7 HMS will probably only be able to give very basic and limited information.
I am hoping that the HMD being developed is more on par with the F35's HMDS rather than the JHMCS, and the choice of going for dual lenses instead of just the single one, as well as the greenish tinge to the lenses in that picture might support this, but there is really too little information to say conclusively yet.
The technology is not all that difficult as you have basically the same thing, if not more advanced, being developed for next generation smart phones. The tricky part is making the thing small and light enough to fit in a helmet without risking it snapping the pilot's neck when he pulls 9Gs.
Equation
Lieutenant General
Yes you're right, it's Leanna Skywalker.
plawolf
Lieutenant General
I need the original photo
There you go buddy.
Edit,
Humm, looks like imageshack is doing its auto-rescaling tricks again.
Drop me a PM if you want the original (1019 x 714).
kwaigonegin
Colonel
Does anyone know if the pitot tube will be removed on actual production aircraft? I'm sure it adds significant RCS to the J-20.
If you're talking about the massive one air data probe, that will only present on initial prototypes and test aircraft. That massive thing and the computers behind it takes up the space where a radar would sit as well.
If you're talking about the smaller tubes further down the nose, they will likely be on the production aircraft. Production F-22 and 35 have pitot tubes too.
kwaigonegin
Colonel
thanks B.. yeah I was actually refering to the air probe not the pitot tube.
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