Nye krefter til den kjente 'Fjordingen' C208

[Speedbird]

Blackhawk's Caravan XP42A Introduced at Oshkosh
Blackhawk Modifications’ Cessna Caravan, fitted with an 850-shp PWC PT6A-42A engine and new four-blade Hartzell prop, is making its first public appearance at AirVenture 2009.

Les hele:
http://www.aviationweek.com/aw/blog...&plckScript=blogScript&plckElementId=blogDest

I tillegg kan man jo også modifisere C208'ern med TPE331:
http://www.texasturbines.com/caravan/ttci_c.htm

Da har man to solide alternativer for å må litt mer 'sprit' i den velkjente traveren.
Blir spennende å se hvordan det blir med gassturbiner i mindre småfly (helt ned til f. eks. C162 Skycatcher) i fremtiden. Stempelmotorer opererer på en teori som ikke er særlig effektivt (f. eks. ved at man har et stempel som endrer fartsretning 180* x antall ganger per minutt og yter motstand for resten av motoren), i tillegg til at gassturbiner veier mindre og gir mer kraft.

 

[BSSW]

Hvor få hester går det an å få i en turboprop nå til dags? Finnes det noe som er svakere enn PT-6?

Tenker på som det går an å få sertifisert til småfly àla C172.

 

[Speedbird]

Du får relativt "små" motorer, det går jo f. eks. en C206 på Sola som har denne motoren:
http://www.soloy.com/Products/Fixed+Wing+Aircraft/Turbine+Cessna+206+Mark+1/default.aspx

Skal lete litt etter en gassturbin jeg leste om et sted på ca. 200shp som var tiltenkt C182.
Ellers er det jo et firma som jobber med wankel-motorer til småfly!

Edit:
En interessant artikkel som stiller samme spørsmålet:
http://www.aerocompinc.com/news/Spring00/turbine_vs_piston.htm

 

[BSSW]

Nå vet jeg ikke hvor god failure-rate wankelmotorer har, men innbiller meg at den er noe dårligere enn gassturbiner. Det var egentlig det jeg hadde i hodet når jeg lurte på dette. Stempelmotorer stopper jo oftere enn gassturbiner.

 

[Speedbird]

Mistral er det som bygger wankelmotorene:
http://www.mistral-engines.com/

Det som er genialt med disse er at de går samme retningen hele tiden, og har 90% mindre bevegelige deler enn en vanlig motor.
Disse motorene er under testing både for EASA og FAA sertifisering i disse dager.

Video av en Arrow med wankel:
http://www.youtube.com/watch?v=3JQVeMoKBT0&feature=related

Edit:
RV7 med en 200hk turbinmotor:
http://www.rv7at.com/innodyn.html

 

[STARSHIP 2]

Det kjedelige med Mistral er at de akkurat sa opp endel folk, noe som vil forsinke sertifiseringen.. Får håpe den slår til etter hvert.

Mistral Slows Engine Work


Jul 21, 2009


Robert Wall/Paris wall@aviationweek.com


The slowdown in general aviation has driven Swiss rotary aircraft engine maker Mistral Engines to lay off staff and slow work.

The engine maker says it expects the slowdown to last six to nine months, after which it hopes to ramp up again. Also effected is development of the 300 hp G-300, which is being slowed but not halted.

Mistral this year sought a new round of capital to help transition to a full-blown production organization from a startup. But given the strain on financial markets, the capital increase has not been as successful as planned. In a statement, Mistral Engines says "although key potential investors have clearly demonstrated their interest to participate in this financing round, convinced about the potential of Mistral Engines' products and growth, the process was clearly impacted by the economic crisis. Investors are thus expected to join Mistral Engines' capital, but at a slower pace than anticipated."

The engine maker says the current situation is forcing layoffs at its Geneva site, with 11 persons affected. It is trying to protect development personnel and says it "will dedicate its activities and manpower almost exclusively to the certification of its 300 hp engine."

The company board has also approved a 1.5 million Swiss francs capital increase to help shore up its balance sheet. The engine maker remains fully financed by private equity. It expects to secure the additional capital in six-to-nine months, triggering the ramp-up of activities.

The engine maker was targeting an early 2010 FAA-type certification for the G-300, to be followed by approval from the European Aviation Safety Agency. That schedule is likely to slip, but by months, not years, says Philippe Durr, Mistral Engines's chief executive officer. "The target is still 2010," he says, but probably not the early part.

The long-term goal for the company is to reach 1,500 engine sales per year within five years.