Greeting friends,Is it possible to create a DME arc to display on the EHSI like in the PMDG 747 ??if so please guide me on how to accomplish this taskthanks a lot.Paul Glinston

Not like the Boeings. Someone contributed to a thread a while back how to build one using PBD fixes, hopefully all your terminal procedures that require arcs are published with them in the sidstar files. Just curious, where do you wnat to build it and is it published in a chart?

doing some simple flight from KLAX (LOOP4) to KLAS...Notcied the 15 dme arc FROM LAX when departing from 25R.

...what about NDB arcs? My local has a 10 nm NDB arc flown using the DME off the ILS.Best regards,Robin.

doing some simple flight from KLAX (LOOP4) to KLAS...Notcied the 15 dme arc FROM LAX when departing from 25R.

KLAX LOOP4 isn't a DME arc, I believe ATC tells the aircraft when to turn towards the LAX VOR.However, I have defined an arc in my sidstar collection for this departure. My current collection can be found at flightsim.com filename pmdg0908.zip. KLAX is included along with 68 other US locations.

Paul,Let's say, for the sake of argument, that you are flying a DME Arc based upon the LAS Vortac. You're flying an arc around some friends having a BBQ next to the station and thought you'd show off your new paint scheme.It will be a 5 DME arc, and you'll fly between the 190 Radial and the 020 Radial (going round clockwise). Note that the 190 Radial is at 190 degrees FROM the station i.e. the inbound course from that point to the station would be 010 degrees.To program into the FMC, the first waypoint would be entered as: LAS/190/5The final one would be: LAS/020/5There is no way to automatically draw an arc on this FMC, so you would enter a number of intermediate waypoints. How frequently you do these is up to you, and clearly the spacing you choose will depend upon how near you are to the station. Generally I find that about 10 degree intervals work pretty well, but as we're close in here I'll just use 15 degrees.LAS/190/5LAS/205/5LAS/220/5LAS/235/5LAS/250/5LAS/265/5LAS/280/5LAS/295/5LAS/310/5LAS/325/5LAS/340/5LAS/355/5LAS/010/5LAS/020/5This set should define the arc accurately enough for you to fly it (and is probably more than you really need). If you were flying an arc on an instrument approach you are allowed some latitude from the actual arc i.e. the procedure is designed so that you can be a little bit off and not crash into a hill. This distance is 1nm from the desired arc on each side from memory i.e. in this instance you could be anywhere between 4 DME and 6 DME and be OK.Hope this helps.James

Thank you so much !Paul.

KLAX LOOP4 isn't a DME arc, I believe ATC tells the aircraft when to turn towards the LAX VOR.

Yeah the LOOP4 is a vector DP, it doesn't get flown in NAV mode in real life, the pilots would do it either hand flying or with HDG.

Yes but you need to get to 3000` when you reach the SMO 160radial and then contirnue till 15DME of LAX VOR before turning towards the VOR..I just wanted to make a visualize indication of that in the E-HSI. so naturally i created a FIX SMO with radial of 160... but i wanted another visualization of the 15dme of KLAX without creating a waypoint

The 15DME instruction only applies to lost communications procedures. ATC will tell you when to turn.The 3000 constraint at SMRr160 is easily obtained in most turbojets, and setting up the VOR on the RMI gives a good picture for reference. I have always loved a slaved RMI, one of the most useful steam gauges ever invented. You can also use the RMI in your turn back to the LAX VOR to let you know when to start rolling out.

I just wanted to make a visualize indication of that in the E-HSI. so naturally i created a FIX SMO with radial of 160... but i wanted another visualization of the 15dme of KLAX without creating a waypoint

There is absolutely no "arc" flying in this LOOP4 departure procedure. None. To comply with 15 DME pilots would simply eyeball distance looking at the scale on their EHSI map or reading DME off LAX VOR. Pilots like simplicity and rather skip unnecessary steps setting up some radii, arcs, etc.

The Boeing FMC's fix page does definitely make things easier being able to draw DME circles on the ND, but you can easily do this stuff by just tuning the VOR and reading the raw data DME...A lot of Phoenix's DPs do this sort of thing too, ie heading 260 until 9DME PXR. That's all you need to know, put the plane in HDG mode 260 and then watch the DME until you're at 9, then turn.