(Field Howitzer 77
) is a Swedish
155 mm howitzer
. It was developed and manufactured by Bofors
. It was available in two versions, the original (sometimes referred to as Haubits 77 A
) with a sliding block mechanism
, and the later FH77 B
export version with an interrupted screw breech
Design and development
In the 1960s Sweden started to look for a replacement for the French Haubits F
(Obusier de 155 mm Modèle 50
). The American M109 howitzer
was offered and tested. Though the price was low the Swedish Arms Administration found the high maintenance costs, the low rate of fire and the not so good mobility of the M109 made it worth the effort to develop a domestic howitzer.
The requirements for a new gun would be:
- High mobility.
- High momentary rate of fire.
The result was a compromise between a more expensive Self propelled howitzer
and a less mobile conventional towed howitzer.
The FH77 was the first field howitzer featuring an APU
to make it self-propelled for tactical movement.
The rate of fire was, at the time, exceptionally high for a 155 mm howitzer. The FH77 could fire 3 rounds in 8 seconds, or 6 rounds in 25 seconds. In a sustained firing role it could fire 6 rounds every second minute for 20 minutes.
Driving & Deploying
The dedicated towing vehicle for the FH77 was the Scania SBA111
(Tgb 40). The truck is equipped with a crew compartment behind the driving cab and a HIAB
-crane for ammunition handling. The Howitzer's APU can be... Read More