VOY Episode 'Friendship One' got stuck on my mind for a bit and I've been trying to rack my brains on how the probe could travel such distances for that amount of time given Warp drive limitations, etc.
So, here's my explanation:
Given what we saw in Enterprise, Friendship One might be capable of reaching what... Warp 1 perhaps initially after its launch 4 years after FC with the Vulcans?
To be fair, without life support or a crew aboard, the probe could probably operate for LONG periods without stopping, but logisics wise, the Warp speed would be too low to allow it to cross 30,000 Lightyears in about 180 years since it was launched).
I never bought the idea that Warp 1 was equivalent of Light speed, because Warp is described as 'Faster than light'... it would have to be at least 1.5 or possibly 2x the speed of light to matter and suit the definition of 'FTL'.
But even if we stick to Warp 1 = 1c (Which I find unlikely), then it doesn't alter the numbers by much and still leaves the probe WITHIN 30,000 Ly's of Earth by the end anyway (according to my calculations).
Plus, Janeway says that 'SF lost contact with the probe 130 years ago' (from her perspective). Since this episode occurs in the 7th year of VOY journey but it would still be just a bit longer than 6 years Voy has been in the DQ, it stands to reason its 2377 when VOY got this mission to retrieve it.
If we subtract 130 years from that, we arrive at year 2247 when SF lost contact).
We know Warp 4.5 was made possible as a cruising speed by 2151 on the NX-01 which allowed only 100x c at the time.
Since SF didn't have many/any deep space ships in the time between the launch of the probe and by the time NX-01 was launched (except the freighters which were only capable of Warp 1.5 - its unlikely the freighters would have been anywhere near the probe to lend a hand and SF wasn't formed until LATER), then its possible that until and after SF was formed, Earth asked the Vulcans to check up on the probe and refuel it on a regular basis (but not upgrade it - because the Vulcans wouldn't do that at the time).
At the time, we could maybe assume the probe might be able to sustain its operations every 2.5 years before needing refuelling?
If the NX-01 intercepted the probe, upgraded its systems and improved its AM storage etc. sometime in the mid 22nd century (say by 2152), it would have travelled around 170 Lightyears in the first 85 years since its original launch (assuming it was travelling at 2x c - which would be Warp 1 under my stated assumption).
If this happened, then the the probe would now be capable of sustaining approximately Warp 4.5 allowing it to cross about 100 LY's every year and only needing refuelling once every 10 years (since ships are designed to operate for 5 years, and the probe didn't have creature comforts and was designed to operate for long periods... I don't think this extension is unlikely).
So, until we get to 2163 (post UFP foundation and sharing of technology- which might happen even BEFORE the UFP foundation), Warp 7 would be a feasibility for starships... but the Friendship Probe could be intercepted again, refuelled and upgraded to this level since its a probe.
This means that from 2151 to 2163, the probe would be able to cross another 1,080 lightyears, or a total of 1,250 lightyears crossed by 2163.
If SF intercepted it in 2163 and upgraded its Warp systems etc. to about Warp 6.5 or Warp 7 specs, that on TNG scale might push it to about 250 times light speed (maybe).
Since we know from First Contact movie that UFP stretches 8,000 ly's, its likely that by the early 23rd century, it didn't extend that far, but SHIPS may have travelled that distance and explored it (possibly even further)- intercepting and refuelling the probe en route until about 2203 (40 years after UFP was formed) - by this point at 250 odd times the speed of light, the probe would have travelled another 10,000 Ly's (or about 11,250 light years in total).
So, if the Probe was intercepted in 2203 one last time and Warp drive was improved by a decent amount, its feasible the probe could have attained even bigger Warp speeds than Warp 6 on TNG scale... potentially even Warp 7 (which would be about 656 times speed of light).
Now, to cross the remaining 18,750 ly's... the probe would need to sustain a speed of about 426x C for the next 44 odd years without support (because I doubt SF would send ships further than 11,250 lys in the early 23rd century and UFP would likely be shifting to exploration of volume and expansion).
Also bear in mind that SF ships by this point had Bussard collectors which could collect interstellar hydrogen (and possibly Deuterium) along with primitive AM generators - its not impossible the probe would be upgraded with these systems and overall efficiency allowing it to maintain operations for those last 44 years.
At this point, I think efficiency and tech upgrades that happened (if they did happen) would allow the probe to function for that long and reach the planet before it finally crash landed and SF lost contact in 2247 (it was in a bad state before it crash landed, so it likely didn't have to travel full 18,750 Ly's but LESS (since Voyager was WITHIN 30,000 ly's of Earth).
That's the only way I can see the Friendship One Probe surviving for that long and reaching its destination.
So, here's my explanation:
Given what we saw in Enterprise, Friendship One might be capable of reaching what... Warp 1 perhaps initially after its launch 4 years after FC with the Vulcans?
To be fair, without life support or a crew aboard, the probe could probably operate for LONG periods without stopping, but logisics wise, the Warp speed would be too low to allow it to cross 30,000 Lightyears in about 180 years since it was launched).
I never bought the idea that Warp 1 was equivalent of Light speed, because Warp is described as 'Faster than light'... it would have to be at least 1.5 or possibly 2x the speed of light to matter and suit the definition of 'FTL'.
But even if we stick to Warp 1 = 1c (Which I find unlikely), then it doesn't alter the numbers by much and still leaves the probe WITHIN 30,000 Ly's of Earth by the end anyway (according to my calculations).
Plus, Janeway says that 'SF lost contact with the probe 130 years ago' (from her perspective). Since this episode occurs in the 7th year of VOY journey but it would still be just a bit longer than 6 years Voy has been in the DQ, it stands to reason its 2377 when VOY got this mission to retrieve it.
If we subtract 130 years from that, we arrive at year 2247 when SF lost contact).
We know Warp 4.5 was made possible as a cruising speed by 2151 on the NX-01 which allowed only 100x c at the time.
Since SF didn't have many/any deep space ships in the time between the launch of the probe and by the time NX-01 was launched (except the freighters which were only capable of Warp 1.5 - its unlikely the freighters would have been anywhere near the probe to lend a hand and SF wasn't formed until LATER), then its possible that until and after SF was formed, Earth asked the Vulcans to check up on the probe and refuel it on a regular basis (but not upgrade it - because the Vulcans wouldn't do that at the time).
At the time, we could maybe assume the probe might be able to sustain its operations every 2.5 years before needing refuelling?
If the NX-01 intercepted the probe, upgraded its systems and improved its AM storage etc. sometime in the mid 22nd century (say by 2152), it would have travelled around 170 Lightyears in the first 85 years since its original launch (assuming it was travelling at 2x c - which would be Warp 1 under my stated assumption).
If this happened, then the the probe would now be capable of sustaining approximately Warp 4.5 allowing it to cross about 100 LY's every year and only needing refuelling once every 10 years (since ships are designed to operate for 5 years, and the probe didn't have creature comforts and was designed to operate for long periods... I don't think this extension is unlikely).
So, until we get to 2163 (post UFP foundation and sharing of technology- which might happen even BEFORE the UFP foundation), Warp 7 would be a feasibility for starships... but the Friendship Probe could be intercepted again, refuelled and upgraded to this level since its a probe.
This means that from 2151 to 2163, the probe would be able to cross another 1,080 lightyears, or a total of 1,250 lightyears crossed by 2163.
If SF intercepted it in 2163 and upgraded its Warp systems etc. to about Warp 6.5 or Warp 7 specs, that on TNG scale might push it to about 250 times light speed (maybe).
Since we know from First Contact movie that UFP stretches 8,000 ly's, its likely that by the early 23rd century, it didn't extend that far, but SHIPS may have travelled that distance and explored it (possibly even further)- intercepting and refuelling the probe en route until about 2203 (40 years after UFP was formed) - by this point at 250 odd times the speed of light, the probe would have travelled another 10,000 Ly's (or about 11,250 light years in total).
So, if the Probe was intercepted in 2203 one last time and Warp drive was improved by a decent amount, its feasible the probe could have attained even bigger Warp speeds than Warp 6 on TNG scale... potentially even Warp 7 (which would be about 656 times speed of light).
Now, to cross the remaining 18,750 ly's... the probe would need to sustain a speed of about 426x C for the next 44 odd years without support (because I doubt SF would send ships further than 11,250 lys in the early 23rd century and UFP would likely be shifting to exploration of volume and expansion).
Also bear in mind that SF ships by this point had Bussard collectors which could collect interstellar hydrogen (and possibly Deuterium) along with primitive AM generators - its not impossible the probe would be upgraded with these systems and overall efficiency allowing it to maintain operations for those last 44 years.
At this point, I think efficiency and tech upgrades that happened (if they did happen) would allow the probe to function for that long and reach the planet before it finally crash landed and SF lost contact in 2247 (it was in a bad state before it crash landed, so it likely didn't have to travel full 18,750 Ly's but LESS (since Voyager was WITHIN 30,000 ly's of Earth).
That's the only way I can see the Friendship One Probe surviving for that long and reaching its destination.
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