Pegasus

[hyoung]

I have plans and a fiberglass fuse for a Pegasus designed by Stan Watson 1979. 166inch wing span, 1675 sq in wing area. Weight 155-176 oz. Flaps and spoilers. Flaps are called "thermic snifflers". Does any one know anything about this model.Is the wing loading considered heavy for this size plane. Would it be a worthwhile project. hyoung

[schrederman]

Yeah, that's too heavy. You'd better send that to me. I wouldn't want you to strain yourself or anything....Post a picture if you can.

Jack Womack

[hyoung]

attaching pic of Pegasus fuse , it's lenght is 65in. and weight is 33oz. Apparantly kitted and sold by "Stans Models" Hazel Crest Il. thanks hyoung

[thrmaln]

33oz just for the fuselage:( Thats insane. It must be laid up with some seriously heavy glass. On the up side it would be very strong and you could use it as a hocky stick in a pinch:p At a 155 oz the only thing the pegasus will be sniffing is dirt!

You could build a set of bagged foam wings and stab light enough and radio equipment is much lighter than it was in 1979. If you build the wings up from balsa, you could save a lot of weight by using micro servos in the wings for each controll surface. This would cut out all of the added weight of the linkage system to actuate flaps and spoilers. Remember that composites added to a wood built up wing can shave a lot of weight and be much stronger if used correctly.

Give it a go and keep us updated,

Marc Webster

[Ollie]

The Pegasus was intended for crosscountry work where the size and weight are an advantage. BTW, the thermic sniffler is an out of production variometer that was manufactured by Don Clark and later by Ace.

The airfoil is a Clark Y but the stubby wing fairings on the fuselage are not a very accurate rendition of that airfoil. The tempered spring steel wing joiners and their rectangular aluminum receivers may be hard to find if they weren't included with the fuselage.

[hyoung]

I do have the wing joiners and receivers. Will research this project with the idea of a lighter build before starting. What would be the ideal weight of a fuse this size? I am finishing up my BOT ready to cover. HY

[Ollie]

The finished Pegasus will have a wing loading of 13 to 15 ounces per square foot and an aspect ratio of 16.5. It won't be a floater that can work small, weak, low level lift but it will thermal very well indeed and be a great cross country ship. The only weight concerns are associated with the extrimities. Keep the wing tips as light as possible and the same with the tail. Lightness in the wing tips and tail will result in a plane that handles better and turns more efficiently. The minimum sinking speed will be about 1.5 feet per second and The Pegasus will climb as nicely in a 5 or 10 foot per second thermal as a Gentle Lady. It just won't be able to turn as tightly at a very low sinking speed as the Gentle Lady. Planes as large as the Pegasus tollerate a high wing loading very well.

Don't worry about the weight of the fuselage. There isn't much you can do about that now. Think of it as a plane that is preballasted for excellent performance in the wind and for cross country work.

[vario]

hey guys i know that its nice to keep weights down for those light thermal days and you can always ballist a lite glider but lets not forget that weight can really increase your glide

i would suggest ,like the others to keep your weights down on any glider but that doesnt mean a heavy glider is meant for the trash can,,todays gliders are much lighter and stronger but that only gives us more flexiability to more conditions



my 2 cents ,,,,,,,,,vario

[Mark Miller]

I am working on a laser cut parts set for the Pegasus. I am also getting leads on the where abouts of the molds for the fuselage to possibly put them back in production. Drop me an email and I'll keep you informed as to my progress. It's a lot od ribs to cut by hand.

The Pegasus was really designed for cross country work and as such the higher weight is not a drawback. it's just a good looking, big honking sailplane. I have two fuselages sitting waiting to be built. Maybe this year.

Cheers,

Mark Miller
Http://www.isthmusmodels.com

[Doc Data]

hyoung,

Sent you an email!

Dave