Kellett XH-28

[63cpe]

Just some pictures of one of the projects I'm currently working on.

It started with the hull of a 1/48 Esci Bo-105 helicopter and two rotors from an 1/48 Alouette II. Eventhough all parts used are in 1/48 it still will be an 1/72 model.
While working on the fuselage I realized I should have taken some pictures with it's old tailboom on. Ow, well too late now... I scratched a new rear empennage from sheet styrene and covered the sides with putty for that nice rounded look.

IMG_20190512_093808900 by Buddy Holly, on Flickr
IMG_20190610_110912296 by Buddy Holly, on Flickr

Also made and interior to fit. Yes it's a three man crew (incl 1 mechanic):

IMG_20190512_093815533 by Buddy Holly, on Flickr

The fuselage of the Bo-105 is rather tall for 1/72 so had to lower the windows. Engine nacelles in place with tape. I got two of the four nacelles from TomZ (many thanks!). Will lose the bulges soon..

IMG_20190512_094343423 by Buddy Holly, on Flickr

Fuselage sanded and front nacelles glued in place. Rotor masts made from Do-16 sponsoons.

IMG_20190609_201845401 by Buddy Holly, on Flickr

Mickey Mouse was here:

IMG_20190609_201959470 by Buddy Holly, on Flickr

IMG_20190609_221415989 by Buddy Holly, on Flickr

Rotor, rotormasts and sprockets testfit

IMG_20190610_110150941 by Buddy Holly, on Flickr

Testfitting the rotors

IMG_20190610_114341152 by Buddy Holly, on Flickr
IMG_20190610_114350385 by Buddy Holly, on Flickr
IMG_20190610_114359384 by Buddy Holly, on Flickr
IMG_20190610_114404685 by Buddy Holly, on Flickr
IMG_20190610_114411720 by Buddy Holly, on Flickr

As I want to play with the rotors (Intermeshing), I need to connect the rotors with shafts and angled sprockets. These are the smallest once's available. Shaft is 3mm. Rotorshaft is 2 mm. This is the situation in the nacelles with rotors in place.

IMG_20190610_115106938 by Buddy Holly, on Flickr

Shafts will end up like this:

IMG_20190610_132513121 by Buddy Holly, on Flickr

Inter connecting shaft is made in three parts. Two 3mm stubs for in the nacelles and a 2mm in the 3mm shafts over the hull between the nacelles. A cover will hide the inter connecting shaft later.

IMG_20190610_132431999 by Buddy Holly, on Flickr
IMG_20190610_132449358 by Buddy Holly, on Flickr

More pictures here: https://www.flickr.com/photos/jetsonsspecial/albums/72157709017768926

I wonder when this project will stop in it's tracks..

David aka 63cpe

[PR19_Kit]

That's one WEIRD looking helicopter, but I like it a lot! 

[Tophe]

I like it a lot!

I disagree (my opinion is different): I love it!

[JayBee]

All Hail the God of gearing engineers.
Kaman only tried using rotors with two blades and they were definitely wierd.

A bold concept, and one that certainly boggles the mind. 

[TallEng]

Thats as mad as a box of chocolate frogs!!
I love it

Regards
Keith

[zenrat]

Ooh, this is nice.  Just the fact you are going to the effort of putting in the gears makes it for me.

[PR19_Kit]

I've got a Huma kit of a Luftwaffe/Kriegsmarine helicopter with twin inter-meshing blades like that and it comes with the gears as part of the kit. Very clever, but I have NO idea what the thing is called. 

[PR19_Kit]

Could be, it's a short, fat thing with the crew sitting out in the breeze I think. YEARS since I saw it though.

[zenrat]

I like it 

I've got a Huma kit of a Luftwaffe/Kriegsmarine helicopter with twin inter-meshing blades like that and it comes with the gears as part of the kit. Very clever, but I have NO idea what the thing is called. 

Flettner Fl 282?

Done by RS in 1/72 and most recently by Mini Art in 1/35.

[63cpe]

Time for a some updates...

First time on it's gear. It's from an Italeri H-19/S-55. Rest is taped to check the composition.

IMG_20190623_110456962 by Buddy Holly, on Flickr

IMG_20190623_110508762 by Buddy Holly, on Flickr

IMG_20190623_110532991 by Buddy Holly, on Flickr

IMG_20190623_110549599 by Buddy Holly, on Flickr

IMG_20190623_110635158 by Buddy Holly, on Flickr

Rear engines nacelles are to be put on once the sprockets in the front nacelle are in place. First some PSR is needed.

David aka 63cpe

[zenrat]

Looking good Dave.
Some interesting objects in the background of your pics.  I recognise some A10 DNA in one of them.

[Scotaidh]

Interesting concept. That looks like a lot of lift capacity for that small a fuselage.    Is that to be a heli-crane? Or are you going for ridiculously overpowered?    Either way, I'm a fan. 

[Old Wombat]

Looking good Dave.
Some interesting objects in the background of your pics.

+1 on both counts!

I recognise some A10 DNA in one of them.

Dunno about A-10 but I can certainly see some OV-10!

[PR19_Kit]

Totally bonkers, but I LOVE it! 

[63cpe]

Thanks gentlemen,

and yes it's a lot of rotor for such a medium sized helicopter. I've put an H-19/S-55 next to it and even a Kaman Huskie ( the mach 2 one, haven't had the guts yet to build it..) still it is a lot of rotor. Hence it'll probably have a lot of liftpower. I wasn't actually planning on a flying crane, was actually thinking about rescue or utility roles.
In utility role I guess it could be able to lift 10 soldiers and three crew plus underslung cargo (a Jeep or Weapon Carrier perhaps?).

David aka 63cpe