Some news going around about the AMCA's actuators. So I am doing a recap :
The AMCA would use actuators for the control surfaces & also for the weapon bay. The weapon bay's opening/closing mechanism was first prototyped 5-6 years ago. It was called the "Door Operation Mechanism". Not a lot of info is available on that prototype, what we know of it so far :
Door Operation Mechanism: This system is an Aluminum alloy door along with multi-link mechanism for opening, closing & locking arrangement. This system is hydraulic actuated at 280 bar pressure. The cycle time for (opening-closing-positive locking) of the system is 2 sec.
Bay Dimensions (LxW): 4.2m x 2m
Material: Aerospace grade AL 6061 alloy in T6 tempered condition.
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The internal hydraulics are mounted on the mid-rib of the weapon bay. The 2 bay doors are independently controlled by the hydraulics on the each side of the mid rib. This gives you the option of opening only one side of the bay & firing off a weapon. :
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We don't know if this was the full sized weapon bay. It is pretty normal for the 1st prototype to have a sub scaled, case in point the SWiFT/Ghatak UCAV. Also notice the bay doors don't have serrated teeth that are commonly seen on the AMCA designs.
At that size the weapon bay can carry the 3.84m long Astra Mk-1 BVRAAMs but not the 5.5m long Rudram-1 NG-ARM. Remember SEAD/DEAD is one of the primary missions of a stealth fighter. The Rudram-1 with its ~250km range is the most potent ARM we have at the moment. Integrating it to the internal weapon bay should be a no brainer. Also a weapon bay that can hold the Rudram-1 should also be able to accommodate the upcoming Astra Mk-2 & Mk-3 BVRAAMs.
Yesterday the DRDO chief was seen briefing the Rajnath Singh on some hydraulic actuators:
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It is being speculated that these actuators are for the control surfaces & the weapons bay of the AMCA. It is very likely that DRDO has completed the development of the actuators of the AMCA by now. But we cannot be certain that these ones here are for the AMCA. There are a few other fighter projects ongoing. Still lets keep the photos here for future reference.