meet the H.A.G. (edit : now with pocket submarine !), meet the H.I.P.E.R. !!!

[Maukse]

Greetings everyone !

I am glad today to introduce you the H.A.G. (hydravion d'assistance globale) - a seaplane able to reach any-place in Kerbin, for rescue or exploration missions.
This 90-parts craft should be playable on most hardware.

It use mods (KAS, rpm and hullcam) to allow deployment of material from the bay and enhance the I.V.A.

Here is a detailed album about the H.A.G. capabilities (Naval version).

To sum it up :

- Stable fly in all regime (sub/trans/supersonic), in any load configuration
- Sea takeoff ability, short landing and takeoff ability
- Fuel load is more than enough to circumnavigate around Kerbin, and cruising speed allows to do it in less than an hour
- Great to play in I.V.A.

For those interested in the design, although being just a stock mk-II jetplane, a few points are worth noticing :

- Position of the front floater is critical. For sea-manoeuvrability, you want them as far as possible in the front. This gives disastrous in-flight behaviour. So it had to be tested and fine-tuned.
- The floaters increase greatly the drag in an asymmetrical fashion once you take a bit of AoA on the yaw axis - thus, after trials, a dual tailfin-design was found necessary for a good flight behaviour
- Nosecone+radial drogue chute was favored over tail connector (landing cleare) and mk25 drogue chute (so much drag !)
- Main wing is 3° tilted upward. Top wing is 4° tilted, a has a centre of lift ahead of the main wing's one. This gives the best result for shortening the take-off length and yet keeping a stable pitch behaviour.

Based on the same design, I do have :

- A ground version, transporting a rover in place of the boat. The rover is a pretty stable one - I will soon plane an expedition to Mount Keverest.
- A SSTO "shuttle" version, for crew rotation in LKO. Apart from lower accelerations, it keeps the same flight capabilities (even sea takeoff at full load).Rapier-powered, cargo bay was removed, mkII LF+LO tanks were added with docking port,, rear floaters were converted to LF+LO.
- A SSTO "nuke" version, aimed at Laythe exploration. The crew cabine was removed, a docking port was added as well as LF+LO tank. 3100 m/s dV once refueled in LKO. Not yet sent to Laythe.

 

 

Spoiler

 

Using HyperEdit, I did test the craft on Laythe, it is of course able to orbit. But I did notice a few surprising things, from Laythe atmosphere pressure - probably already known by most - to Laythe Buoyancy behaviour, which seems way weaker than on Kerbin !!! So I am asking :

Is the Ocean on Laythe made of less-dense fresh water ?????

 

 

This craft has at least one weakness I would like to  correct : at high AoA, if the pitch command is pulled, it has a very weak roll authority. And it has a few points that can still be fine-tuned I guess.

I hope you liked the craft, and the post :-) I just hope one day we'll be able to operate, IVA style, such craft in multi !!!

 

Edit 1: Craft file (navy) : http://kerbalx.com/maukse/HAG-n--v5

Edit 2: Here is a H.A.G. equipped with a pock-submarine, Kerbin&Laythe capable !

 

And now I am pleased to introduce you H.A.G.'s brother, the H.I.P.E.R. ! (Hydravion InterPlanétaire d'Exploration et de Reconnaissance).

Based on H.A.G.'s design, it keeps most of its capabilities (i.e. sea landing/take-off, circumnavigation ...) and can orbit with any payload designed for the H.A.G. (submarine, boat, rover ...).
It is aimed at Laythe exploration, and doesn't require to be manned during transit to Laythe.- so the crew can make the years-long travel in a more comfy station.

 

If the sub design is interesting for some, just let me know and I'll upload the craft.

 

 

Edited December 28, 2015 by Maukse
now with H.I.P.E.R. !

[XB-70A]

Beau boulot !

 

I'll try it in the next few days.

[Maukse]

Well, I still have to put the craft file online

What is the best way to do it ?

[Azimech]

KerbalX.com

[Maukse]

8 minutes ago, Azimech said:

KerbalX.com

Thanks ! Just added the navy-version !
 

I will upload pictures of a ground mission later (+craft file if the lander design looks good to some), and maybe the nuke-SSTO one, once it will have a better sea-behaviour on Laythe - I have work to do on it !

[Maukse]

Edited first post to show the pocket-submarine version, and the NERVa-SSTO design.