Just a quick & dirty about these events:

NWS (Northwest Skyraiders) carrier is local event that is reported on the NCS annual standings.  The flight scoring is the same as all modern events.  Any profile plane is acceptable with on the throttle, elevator and hook moving.  It was a ONE-engine event using the OS FP40.  Since the phaseout of production of the FP, Tower 40's and LA 40's are accepted.

Sig Skyray Carrier uses the named airplane with any engine through 40-size and has a 75 MPH cap only high speed and the high speed factor of low speed.  It is also included in the NCS annual report.

A Sig Skyray airplane with an OS FP or LA or Magnum 40 would be legal in BOTH events.

Winning scores in NWS carrier are in the 200 point range. 
Sig Skyrays can do 250 points due to the more generous engine rules.

The use of a short list of approved STOCK engines in NWS 40 effectively bans the left-handed rotation that allows a tiny number of people to dominate all other carrier events.

A Sig Skyray built with a OS or Magnum 36, would be legal in BOTH of these events, PLUS Sportsman Profile Carrier.

When do you think the OS FP40 went out of production?
When do you think the OS LA40 went out of production?

I don't know for sure. 

I would guess that the last FP was made at least 30 years ago and maybe 10 years ago for the LA.  Personally, I have a well supply of FP 35's and 40's.  But at the Brodak Fly In I will permit the LA 40 in the interest of participation.  If anybody does use the LA 40, I will note that fact in the report to NCS.  They are free to reject the score from the annual standings.  Having used both engines, as well as the FP & LA 15's and 25's, I am convinced that the FP was a better series.  For an event to survive it needs to consider the equipment available to potential contestants.

The Navy Carrier Society does not have a functioning web site.

We are looking at our options.

The original Sig rules did specify a .40 as max. Currently at the NATS they fly Skyray ( hold on to your hat Paul) electric and glow combined as I recall.

The Skyray rules from Sig and as published by NCS include both electric and glow options. There is no “electric Skyray” event or “gas Skyray” event, just  “Skyray.”
Pete

The current issue seems to be that BOTH Sig and NCS are off line at the moment.  I have been able to find a copy of the Sig rules here in Stunthanger.  The NWS 40 rules are in hand.

I am also posting the Northwest 40 Rules

Skyray source is Mike Gretz, the date was 2004 I believe, Pete may have the original SIG Mfg rules.

NW40 was from on their site
http://www.flyinglines.org/rules.nwsport40.carrier.html

PS every time I have ever flown Skyray, basically on the east coast or the NATS these are the rules that were used. I converted to electric about 8 years ago(?). anyway before 2.4 was legal and I used control through the lines.