Which Type sunk more tonnage?

[Tupolev]

So I've been doing some reading during the lulls in my current patrol and it's led me to a curious question I've yet to find an answer to.

We all know the IXs typically sunk more ships per U-boat than VIIs, but there were vastly more VIIs than there were IXs.

So my question is, which Type do you think sunk more tonnage?

T

[banryu79]

We all know the IXs typically sunk more ships per U-boat than VIIs, but there were vastly more VIIs than there were IXs.

So my question is, which Type do you think sunk more tonnage?
T
Given the proportion of VIIs built was far, far superior to IXs built I bet on the VIIs, if we are speaken about total absolute tonnage.

[Admiral Halsey]

I'll place my money on the Type IX's considering that everyone of the IXB's sunk over 100,000 tons alone.

[Dread Knot]

Here's a good spot to start looking....

http://www.uboat.net/ops/top_patrols.htm

The most successful patrols overall list is dominated by Type IXs. Most successful by tons per day, by the Type VIIs.

[rowi58]

Or look at this site - same souce, same data base, but sortet in order of the most succesfull U-Boats.

KLICK HERE (http://uboat.net/ops/successful_boats.htm)


Greetings
rowi58

[Tupolev]

Well, if anyone cares, I've done a bit more digging to satisfy my own curiosity.

Based off some uboat.net information and a couple of documentaries the rough figures are:

685 Type VIIs were built and 187 Type IXs were built. The IXs sunk about 37% of the total tonnage sunk by U-Boats.

I can't say that the other 63% can be claimed entirely by the VIIs, but considering the low numbers of IIs, XXIIIs, Xs, & etc., the VIIs can probably be said to have sunk the most tonnage.

T

[Aktungbby]

:sign_yeah:Exactly! Except in Operation Drumbeat where the IX's, not favored by Donitz initially,(2 $$$!) actually sank slightly more tonnage than the VII's as per Black May. This was due possibly to their having fewer eels to start (14 vs 22) and time-on-station hampered by trips to the milchcows.