Hawker Siddeley 748

[CarLos]

Hi all,

 

Some time ago I acquired a pair of Tiger Models 748's and recently I've cut and sanded the parts of one kit. It is a very basic vac formed kit,  with positive moulds, and if the fuselage seems to be ok - it conforms well to Chris Bowley plans for Aviation News - all remain parts will be scratch build. 

 

The wings are the big challenge, and I intend to use a method similar to ianwau's in his Viscount. Although the plans have a drawing of the wing root section it is different from the sections in the Aeromodeller plans. I looked everywhere but I couldn't find the exact profile used. Anyone has access to the coordinates, so I can have a more acceptable result? Also fuselage diameter and wing chord at the root would be great.

 

Carlos

[Space Ranger]

See here:

http://airfoiltools.com/airfoil/details?airfoil=n63415-il

 

and here:

https://m-selig.ae.illinois.edu/ads/coord_database.html

All the airfoil data you could ever want!

[CarLos]

Thanks very much, Michael. I had somewhere the link to those sites but I forget where. However, according with this page https://m-selig.ae.illinois.edu/ads/aircraft.html the HS 748 (and the Andover) had NACA 23018 at the root and NACA 4412 at the tip. 

 

http://airfoiltools.com/airfoil/details?airfoil=naca23018-il

http://airfoiltools.com/airfoil/details?airfoil=naca4412-il

 

That's one problem solved! Incidence at root and at tip would also be very useful. 

 

On the subject of the fuselage diameter I've found online this drawing. If the number is correct (2.46m, or 34.2mm in 1/72) both the plans (37mm) and the kit (38mm) are incorrect. That's more than 10% off!

 

Carlos

 

 

[Space Ranger]

You’re most welcome. I interpreted your original message to mean that the Andover has the same  airfoil(s) as the Viscount. My apologies.

 

The 748/Andover is an aircraft that is not well-known here in the U.S. I don’t think many made it over here. I’ve certainly never seen one!

 

Come to think of it, I never saw a Viscount, either!

Edited January 20, 2022 by Space Ranger

[Zephyr]

From the HS 748 Srs 2A maintenance manual, wing incidence at the root is 3 degrees, at the tip rib 1 degree.

 

Tail incidence is 0.5 degrees.

 

While I'm at it, thrust angle is 1 degree 42 minutes as set by the engine mounts but when measured on the ground with the propeller removed it is 1 degree 20 minutes.

 

Fuselage external diameter is 8ft 9in.

That will be 37mm at 1/72, so the model is pretty close.

 

Rich

[CarLos]

Thanks a lot, Rich! 

 

No excuses to procrastinate...