Nick Lappos wrote:
Just to keep the juices flowing, and get this newsgroup buzzing again, try
this:

http://webpages.charter.net/nlappos/...comparison.pdf

Nick,

Thank you for stirring the pot. This group has been pretty dry lately.

I think in your your zeal however, some of your data has become some
what skewed. When making comparesons between aircraft I usually try to
use data from the same source. Comparing data from different sources
only leads to errors. The source for the data I am using is from:
DEPARTMENT OF THE NAVY, NAVAL HISTORICAL CENTER and the Naval
Helicopter Association.

For example, you show a self deployed range for the CH53 of 1,120 KM.
But this is the range of MH53 which weighs 3,100 lbs more than (and
carries 3,100 less) than the CH53 whose weight you note. You also fail
to mention that the self deployed range of the V-22 is 2,100 KM, almost
twice that of the MH53. Maximum altitude of the V-22 is also 8,000 ft
higher.

In comparing payloads, you have used the narrow vision of those who
will never accept a helicopter that is not built in Conn. Unlike the
MH53 the V-22 has WINGS. Therefore maximum gross take off weight is
60,500 pounds in STVOL mode or 52,600 pounds in V/STOL mode.

In comparing size, yes empty weight is close but not size. This is a
critical factor on a shipborne aircraft. The CH53 fuselage is 16 feet
longer than the V-22.

Remember that the V-22 mission is not the MH53 mission. The USMC and
USAF feel that speed is critical for their missions. Your CH-53 versus
V-22 compareson is not apples to apples.

As far as comparing the H-60 to the BA609, this is apples to kiwi
compareson. The BA609 is a civil transport aircraft with a 25,000 ft
pressurized fuselage. Don't brag to hard on the safety aspects of the
H-60 either. The redundant systems of the BA609 give it a a MTBFCF
(Mean Time Between Flight Critical Failures 10 times better than the
V-22 and 50 times better than the H-60. This was required for FAA
certification and is one of the reasons for the higher weight to paylod
ratio.

Thanks again for stirring the pot,

Have fun,

CTR