Tiberius Aerospace's Sceptre TRBM 155HG 155mm artillery round

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newatlas.com

Ramjet engine turns artillery rounds into supersonic missiles

Tiberius Aerospace's Sceptre TRBM 155HG 155mm artillery round has a ramjet in its nose that allows it to fly at supersonic speeds and gives it over four times the range of a conventional round.
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Debuting on May 19, 2025 before the Future Artillery conference in London, the Sceptre TRBM 155HG 155mm ramjet-powered precision-guided artillery munition is designed to fit in any NATO standard 155mm artillery piece. Built around a small ramjet engine, it has a range of 93 miles (150 km), can fly at Mach 3.5, and can reach an altitude of 65,000 ft (19,800 m).

The altitude is particularly important because the Sceptre is a precision round with a hybrid GPS/inertial guidance system and AI-enhanced targeting correction that can hit a target with a margin of error of 16 ft (5 m). By flying at high altitude, this puts Sceptre (hopefully) out of the range of electronic warfare jamming devices. In addition, being able to preserve such precision means that it can get by with an explosive payload of only 11.5 lb (5.2 kg).

Sceptre is liquid fueled and is compatible with diesel, JP-4, and JP-8 fuels. Its just-in-time fueling system allows it to be stored for up to 20 years. The company says that it's undergone field tests in the US and claims the Sceptre is significantly cheaper than comparable-range missiles.
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www.janes.com

Future Artillery 2025: Tiberius unveils Sceptre ramjet 155 mm munition

Tiberius Aerospace unveiled its Sceptre ramjet 155 mm munition on the eve of Defence iQ's Future Artillery 2025 conference being held in London from 20 to 22 May. The...
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www.edrmagazine.eu

Tiberius Aerospace: beyond the Sceptre 155 munition, ground-launched missiles, and lethality evaluation software - EDR Magazine

At the Future Artillery conference organised by Defence iQ Tiberius Aerospace unveiled its Sceptre 155 mm long range guided ammunition.
www.edrmagazine.eu www.edrmagazine.eu
 
Their choice of liquid propellant is bit on the weird side, as assuming launched from M777 with barrel length of 5m. Mach 2 speed or 680 m/s will subject the round to about 19135 G, will the propellant tank hold on to those acceleration ?

So far ramjet aided projectiles have been a solid fuel.
 
stealthflanker said:
Their choice of liquid propellant is bit on the weird side, as assuming launched from M777 with barrel length of 5m. Mach 2 speed or 680 m/s will subject the round to about 19135 G, will the propellant tank hold on to those acceleration ?

So far ramjet aided projectiles have been a solid fuel.
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They want to use things like normal JP fuels or diesel for reducing cost so i guess they probaly figured sutch problems out. That said its still a hugh round with 1.5m length so they had some space to work with
 
A question: If ram-jet intended as 'Sustainer', must round be launched as harshly as trad munition ?

System would seem a mini-MLRS, fit better between self-loading 'Howitzer' and self-loading 'Mortar'.

With advantage (?) that can also fire 'trad' rounds.

Uh, which was the US LAV that could fire rockets and 'trad' ?
Ah, the unfortunate Sheridan, and its hapless Shillelagh...
 
Nik said:
A question: If ram-jet intended as 'Sustainer', must round be launched as harshly as trad munition ?

System would seem a mini-MLRS, fit better between self-loading 'Howitzer' and self-loading 'Mortar'.

With advantage (?) that can also fire 'trad' rounds.

Uh, which was the US LAV that could fire rockets and 'trad' ?
Ah, the unfortunate Sheridan, and its hapless Shillelagh...
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To a degree yes, if its going to reach operating speed for the ramjet...particularly if its 1.5m long...they say it leaves the barrel at m2.0 (about 690m/s at sea level). Then accelerates rapidly to m3.5 as it climbs.

They have also posited (not developed) Invictus, a 2.4m long missile using the same tech.
 
timmymagic said:
To a degree yes, if its going to reach operating speed for the ramjet...particularly if its 1.5m long...they say it leaves the barrel at m2.0 (about 690m/s at sea level). Then accelerates rapidly to m3.5 as it climbs.

They have also posited (not developed) Invictus, a 2.4m long missile using the same tech.
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Which probaly also has a solid sustainer in it. Would be interresting if Spectre also did
 
kqcke for you said:
Which probaly also has a solid sustainer in it. Would be interresting if Spectre also did
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You'd think its got a solid booster to launch and get to speed. But as an adaptation of Scepter (essentially its elongated by 1m) you'd have to assume they'd follow the same path in terms of ramjet fuel.
 
timmymagic said:
You'd think its got a solid booster to launch and get to speed. But as an adaptation of Scepter (essentially its elongated by 1m) you'd have to assume they'd follow the same path in terms of ramjet fuel.
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Yeah only a solid booster. That said its Not only longer but also thicker with 165mm vs 155mm. Still i like the idea of it if its cheap enough.
Like a 122mm missile with the range of GMLRS-ER
 
As a though experiment, could this ramjet be adapted to solid rocket booster?
Imagine a GMLRS type system with these.....
OK you'd get less in a HIMARS than 122mm rockets, but it matches the ER version.

Another thought....
Could this also be adapted to airlaunch?
A 155mm missile that ideally fits into weapons bays.....

An 203mm (8") option would be nice too.
 
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www.tiberius.com

Tiberius Sceptre

Sceptre Specifications
www.tiberius.com www.tiberius.com
Looking at the nose of that thing, I now want them to move into air defence and make a mini-Sea Dart looking SAM. On the face of it it has all of the right attributes:
  • Accelerates from M2 out of the barrel to M3.5 at shutoff, so plenty of grunt in the motor to accelerate.
  • 155mm diameter, so a little less than ASRAAM/CAMM.
  • 155cm long and 47kg, so there's weight margin to extend the fuel section and add a booster before it exceeds CAMM dimensions.
  • Unspecified 'payload space' inside the shock cone so there might be room to add a small radar seeker a la Starhammer.
  • It would look incredibly cool on the quad Raven 5 ASRAAM rails.
Problems to be solved would be fitting the actuators for high speed manoeuvring; folding fins wouldn't be needed any more but it would have to be a canard arrangement as there isn't room around the motor.
If it really does have 140km range in its current form I can't see why a small liquid-fuelled ramjet like this couldn't blow CAMM's 25km range out of the park.
 
zen said:
As a though experiment, could this ramjet be adapted to solid rocket booster?
Imagine a GMLRS type system with these.....
OK you'd get less in a HIMARS than 122mm rockets, but it matches the ER version.

Another thought....
Could this also be adapted to airlaunch?
A 155mm missile that ideally fits into weapons bays.....

An 203mm (8") option would be nice too.
Click to expand...
It's a little smaller than Spear 3 in both length and diameter. Would need a booster for subsonic launch but the potential for a M3 140km range munition on quad racks in an F35B bay!?
 
I wouldn't assume it has a high agility. Good enough for the sort of course it's intended to fly.

But air-to-ground potential with the right booster and obviously an alternative to 122mm MLRS-ER surface-to-surface, again with the right (but different) booster.

Note the flightpath includes acceleration on the dive, which would make interception harder.
 

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