I have no doubt that the users of acceleration 'feel' that something is different. I also have no doubt that FSX properly installed with SP1 & 2 also 'feels' perfect. To be fair and scientific to all, some painstaking testing needs to be carried out and the results published.

 

All this talk of mine is superior to yours is pure speculation and smells of spin doctors and voodoo.

 

According to A2A simulations, makers of so many high-fidelity FSX add-ons, Acceleration has a different (improved) method of modeling the behavior of supercharged high-power piston engines, and also piston engine mixture control systems.

 

If you install the A2A Boeing 377 Stratocruiser under SP2, there are a couple of options for controlling the turbochargers from the flight engineers station that will not function. For maximum user engine control functionality, the 377 must be installed in an Acceleration FSX system.

 

The difference is not a major issue for A2A... and even they were somewhat surprised that it should be a his way, as the code base for accel is actually older than that of SP2 by a couple of months.

It is becoming more and more difficult in these forums (fora) to share an opinion or try to offer help without being criticized or attacked. To the point that when there's no attack, any comment triggers an almost automatic response. Regarding the differences between using Acceleration or SP2, believe nobody here has the truth, only opinions and experiences. This includes myself. We may never be certain since what we have from a Microsoft representative is that there are no differences besides the additional airplanes and missions. In my humble opinion, perhaps best way to find out is to try both.

 

 

According to A2A simulations, makers of so many high-fidelity FSX add-ons, Acceleration has a different (improved) method of modeling the behavior of supercharged high-power piston engines, and also piston engine mixture control systems.

 

If you install the A2A Boeing 377 Stratocruiser under SP2, there are a couple of options for controlling the turbochargers from the flight engineers station that will not function. For maximum user engine control functionality, the 377 must be installed in an Acceleration FSX system.

 

The difference is not a major issue for A2A... and even they were somewhat surprised that it should be a his way, as the code base for accel is actually older than that of SP2 by a couple of months.

 

Thanks Jim. There can be no doubt then that Acceleration isn't simply SP2 with a few new missions, aircraft and scenery thrown in. There are clearly lines of code not shared by the two.

Well, I don't tweak at all (except for highmemfix) and there is a difference. That said, no crashes, just small bugs here and there that appears to be in SP2 and not in Acceleration.

 

Yep, that's very true about tweaking, but i think we still need a couple of tweaks(4-5). About instability induced with tweaking: http://asn.aerosoft.com/?page_id=1997

We may never be certain since what we have from a Microsoft representative is that there are no differences besides the additional airplanes and missions. In my humble opinion, perhaps best way to find out is to try both.

 

Did the MS rep really say that?

Oops I wasn't attempting to 'have a bash' at anyone *blush* it was my humble opinion that I could not find anything tangible in what I was reading that's all. I don't have acceleration so cannot offer an opinion.

 

My only concern was that up until the last post nothing factual had been presented.

 

I can see now that if two items have been written to do almost the same job its almost impossible to write them so that they function in the same way if they have different features.

 

Mmm food for thought indeed!

Did the MS rep really say that?

 

Yeah, wonder if the MS rep ever tried to do a launch of the F-16 using only SP2?

 

At least that's what I recall one of the differences was between Acc. and SP2.

I hate the idea of creating any false hope for those fellow fightsimmers that are experiencing "fsx has stopped working", crashes, and ctd's.

However I felt I needed to chim in to tell my recent experience.

I felt it was time to do a fresh install of Win 7 64 and decided to try the SP1 and SP2 options instead of using the acceleration pack that I have.

 

I experienced numerous issues, all of the above.

Not that I had none with previous installs but never this bad before. I could barely get a decent flight in without something, even if it was just an error on exit.

 

So I decided to reinstall only this time going back to using the acceleration pack.

 

I have now put in about 20 flights without a single issue.

I can't say why the difference but after reading these posts it sure makes me wonder.

 

Cheers

Steve

I want to install Acceleration, I currently have FSX SP2 ofcourse. Unistall SP2 then install Acceleration? So you guys are pretty sure about this procedure? If it is a checked procedure, not causing any errors in FSX after installing, then I will go for it.

I know that the best thing to do is to reinstall FSX from zero, then Acc without SP1 and SP2.

I want to install Acceleration, I currently have FSX SP2 ofcourse. Unistall SP2 then install Acceleration? So you guys are pretty sure about this procedure? If it is a checked procedure, not causing any errors in FSX after installing, then I will go for it.

I know that the best thing to do is to reinstall FSX from zero, then Acc without SP1 and SP2.

 

I would highly recommend uninstalling addons + main FSX and re-install a clean FSX with Accel. Almost 100% of addons require FSX with Sp2 so you are almost guaranteed to run into errors.

 

You could try it, but don't be surprised when you get fatal errors. Otherwise, yes, uninstall FSX sp1 and Sp2, and install Accel.

I found this:

 

SERVICE PACK 2 INSTALLATION NOTES

• After you install Service Packs 1 and 2, do not reinstall Service Pack 1.
  
• If install SP2 and later purchase Flight Simulator X: Acceleration, you must uninstall SP2 before installing Acceleration.
  
• If you install Flight Simulator X on a computer running the 64-bit Vista operating system, the Setup progress bar may not indicate progress during the installation. The program still installs correctly on this operating system.
  
• ................
  
• ..........
  

http://www.microsoft...-EN-ReadMe.aspx

 

So I will go for it, I have nothing to lose.

Going to reiterate what I said before

 

I would highly recommend uninstalling addons + main FSX and re-install a clean FSX with Accel. Almost 100% of addons require FSX with Sp2 so you are almost guaranteed to run into errors.

 

What you are reading is assuming you don't have any addons installed.

Im pretty certain i saw a chart somewhere showing the differences in how Acceleration and SP2 calculate IAS and other flight model stuff...