I checked the distance again on the sim from VOR to VOR. it appears to be accurate in DME miles, and timing.
Mapping out the path from Seattle to the Canby intersection is about 139 miles DME.
Mapping out the path straight down to the Canby intersection is 130 miles DME.
This why my timing shows an arrival time of 8:15 to Tina Bar. the FBI plotting shows some turns in the path, but not enough east or west to change the time. if the plane was to head due east, or west, then the timing would be different.
While flying the alternate path, I reach the Canby intersection at around 8:23. while flying the FBI flight path I come up short reaching the Canby intersection in that time frame due to the extra miles.
Seattle to the Toledo area has a lot of valuable information.
1) Takeoff time
2) time of reaching 7,000 feet
3) speeds 155-160
4) Flap settings
5) leveling off at 10,000
6) speeds 170-180
7) time reaching, or turning at Ed Carlson Field (Toledo)
Arriving at Ed Carlson Field at around 7:58 which is about 62 nautical miles. Then you must turn and head southeast to connect with V23. I pass Malay at around 8:00. flying straight down V23 to Malay is 64.4 miles DME, but you don't side step around Ed Carlson getting there, so the times are similar. This part of the path is harder to calculate since the speeds change during the flight. The 3 minute mile doesn't apply.
Flying from Malay to the Lewis river via FBI path is about 29 miles DME. Flying straight down further west in the Woodland area gives the same DME miles, so the plane would be in the Woodland area at the 8:10 position. Just as Scott claims. I believe he said the Woodland area? I gain a minute due to passing Malay at 8:00. flying straight to Malay, you arrive at 7:59.
I'm still not 100% on the area from the Lewis river down to the Columbia. We obviously have issues with timing. The plots exceed 3 miles, so testing is not complete.
At this point is the alternate path plausible? I think it's possible, if Cooper bailed at 8:15. but we have a lot of data that would have to be discounted for the path to exist.