IS-28 Fuselage Construction

Earlier, Smjmitchell wrote:

Can onyone tell me if the skins on
the forward fuselage of an IS-28
are flat wrapped or compound curved
(i.e. stretch formed).

I think that Bill Daniels is probably the RAS resident
Lark expert. But from what I've seen of various Larks,
the forward fuselage skins are pretty much all compound
curved.

Such skins aren't necessarily stretch-formed. They
can also be done using English wheel and hammering
or bumping. Dick Schreder used relatively low-tech
hydroforming to make the compound-curved forward fuselage
skins of the HP homebuilt gliders.

Thanks, and best regards to all

Bob K.
http://www.hpaircraft.com

"Bob Kuykendall" wrote in message
...
Earlier, Smjmitchell wrote:

Can onyone tell me if the skins on
the forward fuselage of an IS-28
are flat wrapped or compound curved
(i.e. stretch formed).


Such skins aren't necessarily stretch-formed. They
can also be done using English wheel and hammering
or bumping. Dick Schreder used relatively low-tech
hydroforming to make the compound-curved forward fuselage
skins of the HP homebuilt gliders.

Thanks, and best regards to all

Bob K.
http://www.hpaircraft.com


Here is an article that Bob wrote several years ago describing Dick
Schreder's system.

http://www.soaridaho.com/Schreder/Co...lly_skins.html

"Bob Kuykendall" wrote in message
...
Earlier, Smjmitchell wrote:

Can onyone tell me if the skins on
the forward fuselage of an IS-28
are flat wrapped or compound curved
(i.e. stretch formed).

I think that Bill Daniels is probably the RAS resident
Lark expert. But from what I've seen of various Larks,
the forward fuselage skins are pretty much all compound
curved.

Such skins aren't necessarily stretch-formed. They
can also be done using English wheel and hammering
or bumping. Dick Schreder used relatively low-tech
hydroforming to make the compound-curved forward fuselage
skins of the HP homebuilt gliders.

Thanks, and best regards to all

Bob K.
http://www.hpaircraft.com

The forward skins are compound curves so simple wraps of aluminum won't
work. The lengthwise curves are actually very large radius so the English
wheel should work fine as would Dick Schreder method.

The factory will probably be able to supply skins but they can be made from
scratch by any competent metal shop.

Bill Daniels

Bill Daniels