4 mile min ILS!

Mavmb

Mavmb

Well-Known Member
http://www.airnav.com/airport/KRNO

Look at the ILS for that airport. The minimums for the ILS are 1100 and 4 miles! The localizer approach for the same runway is 1 1/4 miles! Strange that ILS has higher mins than the LOC. Must be because of the glideslope signal and the terrain? Weird! Anyway, that is one of the highest IlS mins I have ever seen!
 
Mavmb said:
http://www.airnav.com/airport/KRNO

Look at the ILS for that airport. The minimums for the ILS are 1100 and 4 miles! The localizer approach for the same runway is 1 1/4 miles! Strange that ILS has higher mins than the LOC. Must be because of the glideslope signal and the terrain? Weird! Anyway, that is one of the highest IlS mins I have ever seen!
Click to expand...


yeah I know I got grilled in a SkyWest interview on that approach
 
Mavmb said:
Must be because of the glideslope signal and the terrain? Weird! Anyway, that is one of the highest IlS mins I have ever seen!
Click to expand...

I thought it was because of sharply rising terrain on the other side of the airport maybe? They can't let aircraft get too low or they won't have the climb performance to meet the minimum gradient for a missed approach. The "silver" approach with lower mins is for operators in aircraft with plenty of climb performance.

Notice that the DA for the ILS is 1100, while the MDA on the LOC is higher, at 1300. So you can get into lower wx on the ILS. The reason for the higher visibility on the ILS is because you have to either see the runway or go missed as soon as you reach the DA, which is several miles from the runway. On the LOC, you can reach the MDA and plow along out of the clouds, but in low visibility, then descend and land after you get closer to the airport. Thus, the visibility doesn't have to be as good.

Can anybody who flies into Reno on a regular basis confirm this?
 
Yeah, there is a big hill about a mile SSW of the airport, it's the charted obstruction labeled 5027'.
 
Mavmb said:
http://www.airnav.com/airport/KRNO

Look at the ILS for that airport. The minimums for the ILS are 1100 and 4 miles! The localizer approach for the same runway is 1 1/4 miles! Strange that ILS has higher mins than the LOC. Must be because of the glideslope signal and the terrain? Weird! Anyway, that is one of the highest IlS mins I have ever seen!
Click to expand...

Flown it often 135 freight! It has to do mainly not the underlying terrain of obstacles, but the requirement for an "earlier" missed approach due to terrain to the south. See South Lake Tahoe for the same phenomena.

The Silver gets you closer/lower, but has a different missed with I believe a higher climb gradient (MY jepps are sitting in a 402 now, so I cant verify).

In any event, in real life flying, Reno has temp inversions meaning the ice you carry into the approach WILL NOT BE COMING OFF until you land and hack it off. Makes you look at those required climb gradients a little differently (gulp).
 
Here's the RNO Silver ILS plate, it calls for some serious climb gradients on the missed for terrain clearance.

EDIT: Okay, posting the attachment was a no-go...can somebody with admin privs change the attachment file dimensions limit for a .gif file from 620 x 280 to something reasonable? I don't need the filesize limit upped, just the dimensions. As soon as that happens, I'll post the Silver ILS plate.
 
Texasspilot said:
bluelake...what company are you flying for out of RNO?
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Redding Aero has a a few Cessna 402 runs in CA and NV. One run goes from Sac-RNO-Quincy-Susanville-Quincy-Chico-Sac and the other is more basic RNO-Winnemucca-RNO.
 
Okay, here's the RNO Silver ILS 16 plate for real this time. (Gave up on the attachment)

RNO-SILVER-ILS-16R.gif
 
perfect.. now EVERYONE has it.. Everyone's in Da Club!!! except for read that missed approach. No wind? never NO wind up there and in that segment of the valley the wind is often vertical.. and BTW - I odnt mean UP either!!!! Have known a few 135 piston guys (including myself) who turned back to the Sac valley.. high winds and icing = dont go there!

BTW- one time they cleared me direct to WARMM cuz so many were using the Silver. Not ol Boxer pilot.. I had the plain ol plate out and there is no WARMM. For a worrisome second, I thought I migt have been on at the wrong city!!!!
 
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