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Dassault SSBJ projects

hesham

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Hi,

The Dassault Falcon was SST aircraft (Supersonic Transport),it
was a delta wing project,powered by three General Electric F414
or Snecma M88-2 turbojets,two engines mounted under the wing
and one under the fin and above the rear of the fuselage,estimated
speed was 1.8 Mach and range 4000 miles.
 

Antonio

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Dassault Corporate SST project (Fliegerrevue 12/1998)


:)
 

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Archibald

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32 m long.
Project presented at the NAA in September 1997. Dassault doesn't need partnership with a military firm (Sukhoi , Lockheed or other) thanks to the Mirage lineage ;)
So they really wanted to do it, and started at full steam until... the lack of an adequate engine stalled the project 18 month later.

In brief
- military engines have awful maintenance costs : they need overhaul every 200 hours of flight (when civilian engines are up to 2000 hours).
- Airliner engines are way too big
- a new engine is much too expensive for such small market (300 aircraft).

No engine = no aircraft :'( :'( :'(

Dassault project is on standby since late march 1999... a pity. :-[


"un jour, mon prince viendraaaaaaaaaa"
 

CammNut

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Dassault put the Falcon SST on the back burner and instead joined several other companies in the European-funded High Speed Aircraft (Hisac) research study. The latest Aviation Week says the Hisac team has selected a Sukhoi low-boom reference design for further study.

Sukhoi's is one of three reference configurations studied under Hisac; the others are a Dassault-led low-noise design and an Alenia-led long-range design. The Dassault design looks a bit like the Falcon SST; the Alenia design looks like the Aerion SBJ, and uses the same supersonic natural laminar flow concept.

Here are images of the designs taken from a Hisac project report: Sukhoi low-boom; two Dassault low-noise; and one (very poor image of the) Alenia long-range.
 

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hesham

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Hi,

The Dassault designed two projects for the SSBJ aircraft,one we know
it as big three engined and the other was twin engined small aircraft
with also delta wing.
 

Antonio

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Hi,

The Dassault designed two projects for the SSBJ aircraft,one we know
it as big three engined and the other was twin engined small aircraft
with also delta wing.

Hesham,

please try to avoid "post duplication"

Many thanks :)

I think there is another thread somewhere with all the current supersonic bizjet designs: Aerion, Falcon SST, Gulfstream QST, SAI QSST and the European HiSAC research programme.

http://www.secretprojects.co.uk/forum/index.php/topic,36.0.html

http://www.secretprojects.co.uk/forum/index.php/topic,181.75.html
 

hesham

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Hi,

My dears Jemiba and pometablava,the project I meant, was in magazine Flight
International and the delta wing of it was fitted at the end of aircraft.
 

Jemiba

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I only know just one other civil delta winged design from Dassault,
a twin engined executive transport from 1957, but probably it was
just transonic .... ???
 

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hesham

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No my dear Jemiba,

it was designed in 1998 with two jets mounted in the wing.
 

flateric

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Earlier (2003) HISAC iterations plus long-range study better quality image
 

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CammNut

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Found these while web-browsing - the first shows the Sukhoi-designed "reference configuration" for the European HiSAC small supersonic transport aircraft studies. The other two show the Dassault- and Alenia-led study configurations. Windtunnel testing of the reference configuration with various wings, engine locations and even foreplanes is now getting under way.
 

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flateric

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This is 3-engined, 'big' Dassault SSBJ from end of 90s.

Data from Flug Revue site

General (Allgemeine Angaben)
Crew (Besatzung): 2
Passengers (Passagiere): 8

Power plant (Antrieb): 3 x turbofans, possibly based on the Snecma M88 or the General Electric F414. They will be fitted with exhaust silencers to keep noise down.
Thrust (Schub): 3 x 53 kN (12000 lbs) at take-off

Dimensions (Abmessungen)
Length (Länge): 32,42 m
Span (Spannweite): 16,95 m
Wing area (Flügelfläche): 130 sq m

Cabin length (Kabinenlänge): 7,00 m
Cabin width (Kabinenbreite): 1,82 m
Cabin height (Kabinenhöhe): 1,77 m

Weights (Massen)
Empty weight (Leermasse): 17055 kg
Zero fuel weight (Masse ohne Kraftstoff): 18155 kg
Max. fuel (Max. Kraftstoff): 20775 kg
Max. take-off weight (Max. Startmasse): 38930 kg

Performance (Flugleistungen)
Max.cruise speed (max. Reisegeschwindigkeit): Mach 1.8
Transonic cruising speed (Unterschall-Reisegeschwindigkeit): Mach 0.95
Approach speed (Anfluggeschindigkeit): below 270 km/h
Cruise altitude (Rieseflughöhe): approx. 18000 m (60000 ft)
Field length (Startstrecke): 1500 m
Range (Reichweite):
- 7400 km at Mach 1.8
- 12040 km at Mach 0.8

Costs (Kosten)
It was rumoured that a SSBJ will sell at around 500 million Francs (83 million US-Dollars).
Dassault had spent about 5 million US-Dollars when the studies were terminated in the spring of 1999.

Customers (Kunden)
None yet. Dassault has not published any figures on the potential market so far.

Competitors (Konkurrenz)
None

Remarks (Bemerkungen)
After revealing plans to study a supersonic business jet at the NBAA convention in 1997, Dassault went on to give more technical details of its design on 19. May 1998 at the Maintenance & Operations Seminar in Nice.
On the technical side, Dassault has choosen an ovoid fuselage cross section to combine comfort and low drag. The wing has a double-delta planform, coupled with canards. Construction will be mainly in conventional aluminium alloys, thus necessitating the speed limitation of Mach 1.8, which the manufacturer deems fast enough. Typical travel times (including one hour fuel stops) should be eight hours from Los Angeles to Hong Kong or 8.5 hours from Sydney to Los Angeles.
The realisation of a supersonic business jet depends heavily on factors like environmental concerns and thus overflight rights. Dassault claims that the sonic boom, for example, will be much less than with Concorde (less than half, it is claimed). Also, noise levels at take-off and landing should be less, as there are no afterburners needed. A US partner seems to be mandatory for market access there and to share development costs.
After technical studies, which included work on different engine concepts, Dassault said that it could not find a suitable powerplant. Military engine derivatives were rejected because they were not designed for extended supersonic periods, and all-new as well as modified civil engines were much too expensive to develop. On the other hand, Dassault claimed that many other technical questions were resolved. Nevertheless, work on the SSBJ was terminated in March 1999.
 

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CammNut

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Found these images of the various configurations being windtunnel tested at the end of 2007, at:

http://www.hisacproject.com/news.html

They show the reference configuration in the RUAG low-speed tunnel and three different engine integration solutions in the ONERA high-speed tunnel.

Pic 1a has bypass-ratio 3.5 engines about the fuselage while pics 2a and 3a, respectively, have BPR 1.5 engines above the fuselage and under the wing (without foreplane).

The final pic shows the model with unswept supersonic natural laminar flow wing.
 

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Triton

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Model of Dassault SSBJ

Source:
http://forum.avionslegendaires.net/viewtopic.php?f=14&t=3072
 

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Mark Nankivil

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Good Day All -

A tote bag on EPay that has artwork of the Falcon SST - dates to 1998.

Enjoy the Day! Mark
 

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flateric

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This is Sukhoi S-51 (first with this designation). Dassault was in talks with Gulfstream and Sukhoi about possible cooperation but it went nowhere. So this is wrong thread.
 

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