Its a safety design requirement that the engine must detach from body at during high speed impact to minimize injury. Volvo has been using this safety design for sometimes.

The reason why preve get a good safety rating.

u guys really dont know that when frontal accident the engine will drop so it will crush in and kill the passenger inside.

Even ford cannot do it. Apa lagi proton lol. Both also fail la.

Well... its suppose to detach and slide through under the car. The fly part is well... something unexpected, maybe because it just way to fast.

And no, engine should not stay in bay during high speed frontal accident. Engine is never designed to be part of crumple zone. Its a big and heavy metal block, and would raise the impact because of sudden stop.

And take a look on mercedes sandwich platform, and volvo philosophy design behind transverse engine. I think it was volvo who came out with the engine detach idea. I could be wrong though.

The driver survive crash while speeding at 160 km/hr and you want to argue about flying engine block?

As i said.... it suppose to slide under the car, maybe my bad for over-using detach keyword : , and the test is done under speed of 80km/h (64km/h according to euro ncap)
and the preve is going 160, so again, go figure.

http://www.euroncap.com/tests/frontimpact.aspx

http://www.topspeed.com/cars/car-news/2008...ap-ar35634.html

Have a read 

Hard to avoid having collateral damage, most importantly is human safety. Even without the engine, there will be a lot of collision debris that you have to avoid/bear if you're nearby.

Even a small object like fallen helmet after a collision, can cause bad damage to near by cars, but no one thinks that helmet should not be allowed right?

detach
dɪˈtat�/
verb
1.
disengage (something or part of something) and remove it.
"he detached the front lamp from its bracket"
synonyms: unfasten, disconnect, disengage, part, separate, uncouple, remove, loose, loosen, untie, unhitch, undo, unhook, unbutton, unzip, free, sever, pull off, cut off, clip off, hack off, chop off, prune off, nip off, tear off, break off, strip off, disunite; More
antonyms: attach
be easily removable.
"the screen detaches from the keyboard"
2.
leave or separate oneself from (a group or place).
"a figure in brown detached itself from the shadows"
synonyms: free, separate, segregate; More

Let's say you have a better idea of safety, may you please consider to take part and contribute to transportation safety. Can join Proton or the other transportation safety organization.

Otherwise let's just say current compromise has been the best choice until a smarter man solves the problem.

Bro, if not detach how to slide under the car floor?

do you seriously think that the engine flew away from the car? and not the other way round? Eg, accident happened, engine dropped, but the vehicle is just too fast and leave its heart. could it be this way? because when you have front impact crash, i dont think the momentum will cause the engine to fly forwards instead of backward.     

so engine must detach from its mounting for this to happen right?

drawer is meant to be slide for day to day operating purpose......

The engine mount collapse, the engine went under the car.....THEN THE CAR ROLLED OVER, leaving the engine behind which slide/roll/bounce along on it's own momentum.

Is that so hard to imagine?

Engine detach feature itself might not be a standard NCAP testing criteria, but it helps reduce cabin intrusion and contributes to the rating indirectly.

NCAP only for under normal condition la bro

if ure driving in high speed, accident n fly/rolled over couple of times, anything can happen.

Have you done one before at Idiada? Appreciate if you could attach your report as well

Actually the engine should absorb some of the impact and then burst into small pieces.

But in this case the engine ran away for it own life.

Already said it indirectly reduces cabin intrusion liao....there is no NCAP guidelines that say "engine must detached", more like "cabin intrusion must be minimized" or something to that effect, regardless of what method is employed.

1
Engine mounting and energy absorbing frame for a motor vehicle
US 3869017 A
http://www.google.com/patents/US3869017

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#3-Breakaway Motor Mounts-These mounts attach the engine to the frame of the car. They're not noticeable, but the life saving impact is huge. In a front impact collision, they're specifically designed to break the engine away from the frame and with the forward motion, will make the engine slide underneath the car at a 45 degree angle. Making it less likely to have an engine sitting in your lap when the crash comes to a halt.
Article Source: http://EzineArticles.com/1073393

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http://wiki.answers.com/Q/What_is_a_Volvo_..._mount?#slide=1