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Uns Fms

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Response Below......

LegacyDriver said:
Background...

Started on the FMZ in the 145 and did that for about 13 mos. Went to the 140 and the UNS. Hated it. Got used to it. Went back to FMZ and realized how nice UNS was. Went back to UNS. Was so happy... Now back to FMZ.

Off the top of my head, a few things on the UNS that I prefer are:

1) FLPLAN Info - The FLPLAN page shows more waypoints (five or seven) than the FMZ (three). Better situational awareness for my money.

OK. That's more of a user preference than performance, but to each his own. I liked the 3 waypoint because the writing was much larger and not cluttered, so you could just glance down and know what was going on.

2) Performance Page - Gives the winds, fuel flow, etc. etc. On a single page with updates every second. The honeywell shows this info spread across five pages and many button presses.

Can't argue with you there.

3) VNAV - VNAV on UNS gives an exact readout on crossings including: exact descent rate, descent angle, deviation in feet above/below slope, and all targeted info. You can program the UNS to give you a slope or a rate after querying it... So, if I want to know what a 1500 fpm rate is it will give me the slope and vice versa...etc. etc... It gives you a constant target rate, updated every second, to meet your crossing. (I do all of this in my head any way but it is a nice backup.). The FMZ only gives you a pink VNAV arrow on the P1000 and you have to guess what it takes to bring you back to the slope (or calculate mentally with no backup--the difference between a sword and a scalpel).

Press 'Direct To' then line select the RH side of the way point and watch the magic begin! It'll put the put you right back on. the NZs give you constant rate as well, but pilots forget and get tripped up when their speed changes. If you are not going through 10K, you really have to pay attention to the speed. Multiply your GS by 5 or divide it by 2 and add a 0 and you'll hit it every time. With the UNS, you had to leave the box on the VNAV page in order to see it. Has that changed? Does the UNS put someone on your ADI so you can see what you have to do or do you have to keep looking at the box? I liked the pink/magenta dot on the NZs that told you where you needed to be. It was no different than flying a Glide Slope on an ILS.

4) WX - The ACARS on the UNS is much easier than the FMZ system. Way fewer buttons to press and easier to read IMHO.

Not famaliar at all with ACARS on the WX side of either box.

I have minor quibbles with the UNS and would love to combine it with the FMZ to come up with the ultimate fms but prefer the UNS over the FMZ.

The VNAV alone is light years ahead of the FMZ's for my aircraft.
Can you couple the VNAV to the A/P with the UNS? Can you set up a ILS to any runway in the database on the UNSs like you can on the NZs?
 
HawkerFO, if you've only used a UNS-1M then you have no idea what it is like to use any other UNS-1.

I agree, the FMZ is far superior to the UNS-1M. However, when I said I preferred the UNS to the FMZ, I was not thinking of the 1M. I apologize for not being clear about that.

Incidentally, in the Commander 1000, I can couple the autopilot to the UNS-1M VNAV, for whatever that's worth.

To add to Legacy Driver's comments, I prefer the NAV page on the UNS (not the 1M!)-- I like how it is logically laid out for doing position reports.
 
I am aware of the direct to function for vnav on the fmz. The uns has the same feature.

However, the uns provides much more fidelity for vertical path control.

For example, if my ground speed decreases and I descend below my target vnav path the uns gives me a new target vertical speed (updated every second) that will get me to my crossing. It has the fidelity down to a foot per minute so it may show my original 3.0 slope as 1700 fpm.... As I drift below the target it starts saying: 1690...1678...1650...1640...1632... So I can adjust my vertical speed to that new target and will make my crossing. I get this in addition to the pink vnav arrow...IIRC.

The fidelity of the thing is beautiful for vnavs and gives you great info...

Haven't flown it in awhile but miss it all the same.

It also gave me more info in the waypoint query page than the fmz (full airport and vor names including freqs). I liked it a lot.

Uns-1M sux...flew it on Citations and hated it. But like the K. Fmz is okay but not as much info there...
 
The 1M is a classic, you will find it in older model King Air 200 and 350's. The -k model is a much larger unit, enables STARS/SID load ups and V-NAV descents.
There is no comparison the K is definitely superior over an M.

But if you really want the bells and whistles, get the UNS-1L, I have it in a Citation and you can LNAV approaches with it. It is 5 times faster than the -K unit on power up and disk loads.
 
Thanks for the info guys. Looks like we'll be getting a plane with the 'K'. The nav sysytem wasn't the deciding factor but it did weigh into the choice.Wish we could sport for the UNS1-L and Pro Line 21, but not this time.

I've flown the UNS C+ and the gns units. Someone told me the M didn't have SID/STAR info and I just couldn't believe it. But it is so.
 
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