Li Pll questions please

[Flitzer]

Gentlemen,
if I may please call on members' generosity again.

I have a question or two about the Lippisch Pll.

I read it would have been constructed using 'composite materials.

Any idea of what this material might be?
Would this have been confined to the skin?

If so what would the frame have been made from; metal or wood, and how would the skin be attached?
Glue/adhesives?

Many thanks
P

 

[Justo Miranda]

The structure was of plywood and the coating of the plastic Dynal Z5 manufactured by Dynamit Nobel-Troisdorf.Painting antiradar "Schornsteinfeger" developped in the BHF Hochfrequenzinstitut Travemünde

 

[Apophenia]

Justo: The protype was made from molded plywood but, according to Aircraft of the Luftwaffe 1935-1945: An Illustrated History (Jean-Denis G. G. Lepage, McFarland & Co), the production version "airframe was planned to be made of synthetic material (Dynal and Tronal)..."

Peter: There was to be no frame - the production PII structure was to be a monocoque "with no load bearing frame". The surface was a stressed skin composite. The outer covering was of Dynal as Justo said but this was bonded to a core of Tronal.

Dynal and Tronal were both cellulose products by DAG (Dynamit AG - Troisdorf). Tronal was a type of wall board wet-cast from crushed wood pulp fibers -- some sources say expanded wool ;D The Tronal core would be covered by Dynal, which was a phenolic resin sheet.

The Tronal core and Dynal covering would be bonded with phenol-formaldehyde resin (Polystal V) and pressed into shape in a female/male form. Presumably the resulting surface would be quite smooth -- perhaps akin to the DH Mosquito molded in a similar way (albeit from quite different materials).

 

[Flitzer]

Many thanks Justo and Apophenia.

Any info/diagrams of the under-belly gun pod by chance?

Many thanks
Peter

 

[Justo Miranda]

Additional info -post-1

 

[Justo Miranda]

Additional info -post-2

 

[Johnbr]

The P 11 v2 powered one was lost in the same raid as the P13a powered.

 

[joncarrfarrelly]

Exploded view drawing:
http://deutscheluftwaffe.de/archiv/Dokumente/ABC/l/Lippisch/Delta%20IV/Delta%20VI%20Sketch078.jpg

 

[Flitzer]

Many thanks everyone.
And as usual , excellent results.

Truly appreciate it.
P

 

[Flitzer]

A little more.

If I may ask another question please?
Where would the fuel filler access points/hatches etc be?
The fuel tanks look like they are mid wing.

Many thanks
P

 

[Flitzer]

This is as far as I've got with the under belly gun pod version.

Many thanks
p

 

[Justo Miranda]

My opinion ...

 

[Flitzer]

Thanks Justo.
Also by swapping the nose wheel for the tail wheel arrangement you suggest, it would free up the nose for other armament variants.
Nose mounted cannon for example?
Apparantly many variants were planned; fighter, fighter bomber, heavy fighter/destroyer etc. This tail wheel layout would allow greater scope for a greater range of armaments to match intended roles I think.
P

 

[Flitzer]

Just as Justo suggested.

Any views on alternative armaments and positions?

Many thanks
Peter