the jab twin is a thing now

[BrendAn]

 

At Jabiru, we’re dedicated to making every dollar count. Beyond its attractive purchase price, the J432 is engineered for minimal operating costs, ensuring long-term affordability for owners and operators alike.

With a straightforward, durable design, the J432 keeps maintenance costs low, and we’re committed to providing accessible, affordable spares and repairs. And with fuel consumption at just 30 litres per hour, the J432 helps you maintain highly competitive hourly rates without sacrificing quality.

Available as a Factory Build, Kit or Builder Assist to suit your preference and your pocket.

 

i didn't realise they reached production. 

Edited Saturday at 08:42 AM by BrendAn

[BrendAn]

apologies if this has already been posted

[Student Pilot]

Bellanca made a similar aircraft for cheap twin training

[Reynard]

It makes me wonder if the market is sufficient to pay for the development costs.

[facthunter]

The MILES Gemini was prettier than any of them. If you can't feather the Props, it's not likely to fly well on one engine, so not a lot of practical use. With engines you have twice the chance of an engine failure. Mishandling of Twins causes many crashes. VMCa is usually well above the stall speed. Nev

Edited 23 hours ago by facthunter

[BrendAn]

6 hours ago, facthunter said:

The MILES Gemini was prettier than any of them. If you can't feather the Props, it's not likely to fly well on one engine, so not a lot of practical use. With engines you have twice the chance of an engine failure. Mishandling of Twins causes many crashes. VMCa is usually well above the stall speed. Nev

being able to fly on one engine was one of the requirements of the design. the south africans asked for a jabiru that could fly over tiger country from what i have read.

[facthunter]

Fly   a bit  further on one engine, perhaps?  You tell me what AUW it will fly on one engine at and maintain height. Nev

[BrendAn]

Jabiru	J432
Category	Experimental
Design Standard	ASTM F2245
Engine	2 off, Jabiru 2200, 4 cylinder, 60 kW, 80 hp
Propeller	2 off, 2 blade, fixed pitch, composite scimitar prop
Cruise speed	125 knots TAS
Stall speed	VS0 (clean) 52 knots VS1 (full flap) 48 knots
Climb rate	1,200 ft per min
Max cross wind	14 knots
Fuel capacity	135 litres
Fuel consumption	30-32 litres/hr
Range	550 nm
Endurance	4.5 hours
Max takeoff weight	Experimental 760 kg
Empty weight	480 kg
Usable weight	Experimental 280 kg

[facthunter]

Where does it mention single engined performance or a VMC(a) for engine out? On One you have only 80 HP at WOT at sea level . Usable wt is I assume, Payload . One 80 HP motor is not going to lift those figures Conveniently labelled "EXPERIMENTAL".. It can never meet modern certification performance requirements. Nev

[BrendAn]

11 minutes ago, facthunter said:

Where does it mention single engined performance or a VMC(a) for engine out? On One you have only 80 HP at WOT at sea level . Usable wt is I assume, Payload . One 80 HP motor is not going to lift those figures Conveniently labelled "EXPERIMENTAL".. It can never meet modern certification performance requirements. Nev

it only has 280kg payload.  i am only passing on what is on the jab website.

[BrendAn]

so if it can't fly on one engine , what is the purpose of it.  might as well have a j230

[facthunter]

It doesn't say PAYLOAD. I  assumed that was what they Mean. . Nev

[Blueadventures]

Will fly on one engine. Sue gave us an update last Thursday. The USA one is flying into Oshkosh. It’s built to fit Mozaic. I’ll let Jabiru announce the specs and performance etc in their good time. Some detail will be on their Webb site. 

[facthunter]

I just cannot see the Purpose of it.  It's solely a  South African Project as far as I can tell. It can only extend the glide if you have some height. I know that engine RPM synchronisation (or Lack of it) drives you nuts with the fixed pitch Props. With CS, it's a lot easier. A lot of multi engined planes  have Auto Synch engaged when you get them close, otherwise it drives everyone Nuts. Even people on the ground. Nev

[facthunter]

 It Certainly cannot carry a useful weight engine out in the form Presented. Even With the Modern Ones IF the engine cannot be feathered you don't go anywhere, and VMC (a) is even higher so your control difficulties are magnified and climb performance is further degraded. Feathering is a must. How many of you have flown assy? It's critical even when everything goes well . Nev

Edited 15 hours ago by facthunter

[Reynard]

Here is a very early flight test story…..
 

https://www.jabiru.co.za/aircraft/Jabiru Twin SA Flyer April 2017.pdf