I am aware that this has been discussed in a couple other threads, but I still have questions and I am no longer able to reply to them. so here we go.

In one of the other threads this comparison was made and I have some questions about it.

Advantages of a wing mount:

1. Interference drag is minimized
Please explain.

2. Intake efficiency is rarely compromised
With an CRJ type mount this problem also rarely appears correct?

3. Engines provide wing bending relief reducing wing structure weight
The MD-88 is actually lighter than the A320 and 737-NG per passenger and in total.

4. Wing profile is not compromised
Neither is the profile compromised in a tail mount.

5. Pylons tend to control span-wise flow
Ok this one makes some sense.

6. Less acoustic damage to airframe
This one also needs some explanation, I have read: with wing mounted engines the shock wave from the engine tends to strike the rear of the fuselage and causes vibrations that have a negative affect on the fuselage, not to mention the thrust reversers directing the trust right at the fuselage.

7. Reverse thrust design uninhibited
what down sides are there to the MD-88 style of thrust reversers are there, and also there are many different thrust reversers on the various tail mounted engines out there.

8. Good accessibility
This is one that I can understand with engine accessibility but with the CRJ how bad is this really affecting the situation. and when it comes to all other forms of accessibility the tail mounters have it, with the shorter landing gear.

9. Good for a gear up landing
how is having the engines under the wing good for a gear up landing?

Disadvantages of a wing mount:

1. Higher yawing movement with engine failure
this also makes sense and is a good reason to have the tail mounted engines.

2. Roll freedom on the ground is limited
also a plus for the tail mounted.

3. Low thrust line can have an adverse effect on longitudinal control
once again a plus for the tail mounted.

4. FOD ingestion
yet another plus for the tail mounted.

Advantages of a tail mount:

1. Reduced noise in cabin
I have been on MD-90s and never even heard the engines start up they are that quiet, granted I was towards the front and the rear seats on a DC-9 are way different.

2. Low yawing movement with engine failure
as stated above this is a good thing

3. Free to design more aerodynamic wing without engine mounts
I have read that the MD-8X wing is one of the most efficient wings of it's time.

4. Odd number of engines can be mounted
I think that 3 holers are kind of done with, being twins are much more fuel efficient.

Disadvantages of a tail mount:

1. Passenger accommodation is reduced for a given length.
I am not suggesting they make a 300 seat tail mounted airplane, but the 737/320 range is well within a tail mounted airplane's abilities.

2. Engines susceptible to airflow disturbances
As I stated above this is not too much of a problem for twins, can be a problem with tri-jets.

3. Fuel lines require careful routing to the engines
how much of a problem is this?

4. Aft set wing to compensate for aft C of G and larger tail surface required
How is this a problem?

5. Basic structure weight must be higher
As I stated above the aircraft tend to be lighter than comparably sized wing mounted airplanes.

6. Higher set tail plane can lead to problems in stall qualities.
This can be a problem, but with all of the new components of the flight controls out there, I think that a stall can almost totally be avoided.

So that is my take on the situation. I am very curious about what all of you think and weather or not you can shed some light on this situation.

as it stands in my opinion, Tails: cons=3 pros=10, Wings: cons=6 pros=4, toss-ups: 5.