This just in on GEnie... (no editing of the original message)
Games RoundTable
Category 11, Topic 38
Message 201 Mon Oct 21, 1991
T.MCINNES2 [T.MCINNES2] at 09:48 EDT
James Kundert had some questions about Wet Navy Part # in Challenge #53.
Here are the answers plus a copy of a letter to GDW requesting an errata to
correct some typographical errors in the published copy
James,
At last, a moment to respond to your bulletin board item.
Page 22: Yes, Diesel engines have no scale efficiency, and steam engines one
scale efficiency.
Page 22-23 Its a ratio (in all cases, not just MHD tunnel drives) of weight
to meters in diameter and volume (in kiloliters) to meters in diameter,
although volume is not necessary except in tunnel drive systems. Would have
loved to include an example but space was tight, extremely tight.
Page 23- Sails: 50% of the mast height is the total yardarm span limit.
You're right about the maximum fore and aft sail area. Although, further
testing suggests this may be too limiting. It doesn't allow for very large
jibs, for instance.
Page 24, the sail power table-- Yep, you're right, I should have included a
kg/meter column to make the transition easier.
Page 24, the formulae: V2should beV squared. The R formula should be R=
sqrt (D)* rf (theresistance factor from the hull type table.)
Page 25, Superstructures: That's an abbreviated version of the hull damage
point calc, only determining the destroyed level because I don't think you can
render a superstructure inoperable, but you sure can destroy it. It relates
to combat rules and hit location tables yet to come, Michelle and Challenge
readers willing.
As information, hereis the text of the letter I sent to Michelle after
reading thePart 1 galley proofs:
"Dear Michelle:
I received the galley proofs for Wet Navy Part 1 yesterday afternoon and
checked them this morning. I found a couple of areas where changes were
needed and tried to phone you at the office this morning. However, the person
I spoke with said Challenge #53 was at the printers.
These are the changes that are needed:
Page 19, first paragraph: You had changed the copy to read "Select a hull
size from the UCP column in the MegaTraveller basic hull design section of the
Small Craft Hull Table..." This is incorrect, you can select a hull size from
any of the three hull size tables in the basic hull design section. Wet
Vessels can be (and often are) as large as starships.
Page 19, third paragraph: "MegaTraveller Small Craft Hull Table." Again,
any of the three tables can be used.
Page 21 "Powered Ships" section third paragraph beginning "Calculate Hull
Resistance: Use the formula R=CDxrf..." the formula should read R=(sqrt
(D))*rf. The parentheses were dropped. These are needed to make sure that
only the square root of D is extracted then multiplied by rf when calculating
R. Otherwise a reader may multiply D times rf then extract the square root of
result which is incorrect.
Page 23 "Sail Area" section, second paragraph, third sentence beginning "
Maximum mast height..." Should read "Maximum mast height in meters equals the
square root of a hull's volume in kiloliters."; inserting "hull's" between "a"
and "volume".
Page 24 The potential speed formula is incorrect. You have it as V2=P2/R.
It should be V2=P2/R, that is V squared = (P*2)/R.
(For clarification: The power formula is P = R(V squared)/2. The velocity
formula is V Squared = (P times 2)/ R.)
Page 24 The resistance formula is missing its parentheses. Should be R=(sqrt
(D)) * rf. See my comments above.
If at all possible, please publish at least the errata concerning the
formulae in Challenge #54. If readers use the formulae as stated in #53 they
will get incorrect results. Thanks in advance,
Terry McInnes"
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