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Grob G-103 Twin Astir II (Improved version)

582 JonathanElst  5.0 years ago

This is an improved version of the Twin II i released a couple of weeks ago. The biggest change is that the performance and L/D are much better due to better wings and lower drag.

Furthermore I added some decorative details and changed the fuselage and canopies. It looks even more like a real Twin now XD. This version has a retractable engine(VTOL) which isn't a feature the real Twin II has.

The Twin II is a great training glider which is capable of simple aerobatics. It set the world record for an out and return flight in 1981. The Twin Astir is one of the most succesfull gliders ever created, with a total of about 1100 built (all twin variants). Most of which are still used today.

Spotlights

General Characteristics

  • Successors 1 airplane(s) +7 bonus
  • Created On Windows
  • Wingspan 81.8ft (24.9m)
  • Length 39.5ft (12.0m)
  • Height 10.5ft (3.2m)
  • Empty Weight 3,053lbs (1,385kg)
  • Loaded Weight 3,347lbs (1,518kg)

Performance

  • Horse Power/Weight Ratio 0.268
  • Wing Loading 11.1lbs/ft2 (54.2kg/m2)
  • Wing Area 301.4ft2 (28.0m2)
  • Drag Points 741

Parts

  • Number of Parts 50
  • Control Surfaces 7
  • Performance Cost 303
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    25.5k Mustang51

    @JonathanElst Dat is cool! Ik zal het proberen

    5.0 years ago
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    @Mustang51 Biddinghuizen inderdaad, daar vliegen ze ook met Twin Astirs als deze XD

    5.0 years ago
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    25.5k Mustang51

    @JonathanElst en ja ik ben ook Nederlands!

    5.0 years ago
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    25.5k Mustang51

    @JonathanElst ahhh nice near Arnhem right? And I do fly planes in real life but only as a hobby, not for profession. I’ve wanted to try glider flying for a long time but I never got round to it. There is a school near Lelystad airport that I might try out.

    5.0 years ago
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    @Mustang51 jij bent ook nederlands zie ik net aan je reactie op tommie XD

    5.0 years ago
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    @Mustang51 Thanks! Yes i'm a glider pilot. I fly at Terlet in the Netherlands. I have flown in a DG1001 with engine once, but besides that i haven't tried powered flight. Are you a pilot irl too?

    5.0 years ago
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    25.5k Mustang51

    This is very cool! it looks fantastic and flies superbly as well. I see that you are a glider pilot in real life too! Where do you fly and have you tried powered flight too?

    5.0 years ago
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    2,556 tommie

    @JonathanElst Sorry, nu staat ie er wèl op
    https://www.simpleplanes.com/a/I48Kw6/LS-4-Romp

    5.0 years ago
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    @tommie Waar kan ik dan jou romp vinden?

    5.0 years ago
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    @tommie Superfijn dat je romp hebt gedaan! dat vind ik vaak het lastigst, ik ga zo aan de vleugels beginnen. We kunnen het eindresultaat misschien allebei uploaden, maar ik vind het ook prima als jij het alleen upload als je dat liever hebt.

    5.0 years ago
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    2,556 tommie

    @JonathanElst Ik heb de romp al klaar, maar ik vroeg me af op welk account we het zetten? Ik zal de romp unlisted online zetten, zodat jij hem ook hebt.

    5.0 years ago
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    157 Randomed

    very nice

    5.0 years ago
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    13.7k FlyingHueman

    Nice! Always great to see gliders around, we don't get many of them around here. Come to think of it, I should do a few more myself in the future.

    5.0 years ago
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    2,556 tommie

    @JonathanElst Haha die stemme was al wat langer geleden, ben er zeker van dat die beter kan. LS-4 lijkt me een mooi plan! Ben al begonnen aan de LS-4

    5.0 years ago
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    @tommie dankjewel! Het lijkt me zeker leuk om iets samen te maken, wat dacht je van een LS-4? Of heb je een ander leuk idee?
    Ik vond trouwens je Stemme heel mooi gedaan!

    5.0 years ago
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    1,298 PlaneBoy3

    Interesting! I knew it had something to do with airflow.@JonathanElst

    5.0 years ago
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    @PlaneBoy3 Thank you! @PlaneBoy3 It's called a yaw-string, we use it to see the direction of the airflow around the plane. If you fly directly into the airflow you lose less altitude then when you fly with the airflow from the side. The string is much cheaper and easier to use than other yaw instruments.

    5.0 years ago
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    2,556 tommie

    Je verdient echt veel meer punten! Als je eens samen een kist wilt maken zeg het maar!
    Prachtig gemaakt hoor!

    5.0 years ago
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    1,298 PlaneBoy3

    Nice update, I like all of the details, oh and I forgot, what’s the piece of string attached to the cockpit called? Just wondering. @JonathanElst

    5.0 years ago