Crimean War

[Russian Start advancing at 5:00 ,deployed their army, deposed their field artillary and start bombardment until all of the turkish guns were silenced.Then they start their assult.That hlf an hour which Raglan pointed  is the time the assult lasted .In the first assult the turks perished,no source pointed that turks finished their ammo,or thy didn't know how to work with british guns.
After 1840 Britain was main source of Ottoman Army weapon until 1880s which Germany took place of Britain.In 1843 new ottoman Army fought his first battle with kurdish rebels with british artillary and french instructors.
The ottoman army also used this artillary very effectively against russians one year before in Romania,So they knew how to use artillary.
Their weak point was in lack of communication,discipline,and managment.

Paul wrote

At that time Turkey had done away with purchasing commissions or promoting on nepotism and had a modern officers academy. They had the most modern and forward looking army in the world.

Omid wrote

They had modern weapons but not the modern army.This Statement needs some descriptions:After the defeat of Mohammad Ali with the rise of Abdalmejid turks try to build a new and modern army and revolutionize the empire administration system.This was a long process that merely completed in 70s of the 19th century and after 1877-1878 war they again reconstructed it until Balkan war and wwi completely ruined that army.
In 1854 their army was not a match for russian.