IS-28 Fuselage Construction

[smjmitchell]

Hi All,

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).

In other words would it be easy to rebuild the forward fuselage using
sheet stock or would it be necessary to buy the preformed skins.

Thanks,

Steve

[Bob Kuykendall]

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

[Wayne Paul]

"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/Construction/Hp_belly_skins.html

[F.L. Whiteley]

Although the glider division is clearly missing, you still might try the
factory. www.iar.ro

"smjmitchell" > wrote in message
om...
> Hi All,
>
> 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).
>
> In other words would it be easy to rebuild the forward fuselage using
> sheet stock or would it be necessary to buy the preformed skins.
>
> Thanks,
>
> Steve

[Paul Adriance]

I have contacted the factory via email regarding an IS-28b2 and IS-32 and
received helpful responses. I would encourage you to try as well.

Paul Adriance

"F.L. Whiteley" > wrote in message
...
> Although the glider division is clearly missing, you still might try the
> factory. www.iar.ro
>
> "smjmitchell" > wrote in message
> om...
> > Hi All,
> >
> > 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).
> >
> > In other words would it be easy to rebuild the forward fuselage using
> > sheet stock or would it be necessary to buy the preformed skins.
> >
> > Thanks,
> >
> > Steve
>
>

[Bill Daniels]

"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