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Dec 03, 2018, 07:24 PM
Tony Audsley Retired Locksmith
Lockey's Avatar
Quote:
Originally Posted by birdofplay
see if it wanks out at some new length.
Wouldn't mind wanking out some new length myself Bob

Lockey
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Dec 03, 2018, 07:30 PM
Tony Audsley Retired Locksmith
Lockey's Avatar
Thanks Tom, I knew you would be able to explain it .. not sure I totally understand but thanks a million

I guess what you are saying though is .. if I add the tail and booms as in the pic, it will be a lot more stable (as I thought)

Lockey
Dec 03, 2018, 08:01 PM
Retired CAD guy
birdofplay's Avatar
I could never understand the need for such accurate bombing when dropping a NUKE !

I mean How close do you have to be when wiping out a ~10 mile radius ?

Lets not forget that Convair used a lot of Political tricks to get the Northrup Wing project Canceled.
Not just cancelled but chopped up and scrapped.
Plus all documents were wheeled away to rest next to the Ark Of the Covenent in some
dark grungy old warehouse-13 kind of place !
Dec 04, 2018, 02:00 AM
flyin' fool
goldguy's Avatar
Quote:
Originally Posted by tspeer
A flying wing doesn't have much damping. It is quick to react to the controls, but it can take a while to get properly settled down.


I'm an avid sloper and have never experienced a flying wing not returning to normal trims instantly, even after extreme aerobatics. The same for my powered wings. All 'on rails' rock solid flyers. They only suffer from stability or pitch problems when not properly trimmed.

For slope wings the airfoil is key, and for both, the proper CG and any reflex if required based on the airfoil used. Of course, motor thrust angles for powered must be considered.
Last edited by goldguy; Dec 04, 2018 at 02:11 AM.
Dec 04, 2018, 02:03 AM
flyin' fool
goldguy's Avatar
Pitchy flying wings = tail heavy.
Last edited by goldguy; Dec 04, 2018 at 02:09 AM.
Dec 04, 2018, 02:27 AM
Tony Audsley Retired Locksmith
Lockey's Avatar
Thanks for the info GG

Lockey
Dec 04, 2018, 05:01 AM
Careful,.. confident,.. CRASH!
Dukejet's Avatar
Hey Lockey, are you comparing the Scout to a wing?
The Scout doesn't have an air foil.... just a flat wing...
Just sayin.... kfm2.....
Dec 04, 2018, 05:10 AM
Tony Audsley Retired Locksmith
Lockey's Avatar
Quote:
Originally Posted by Dukejet
Hey Lockey, are you comparing the Scout to a wing?
The Scout doesn't have an air foil.... just a flat wing...
Just sayin.... kfm2.....
Yes mate .. next mod

Lockey
Dec 04, 2018, 01:15 PM
Registered User
Just to add a bit to Tom's info: A swept wing with a larger root chord than tip chord helps give the elevons some more moment arm, increasing dynamic pitch stability
Dec 04, 2018, 03:32 PM
flyin' fool
goldguy's Avatar
Quote:
Originally Posted by Dukejet
Hey Lockey, are you comparing the Scout to a wing?
The Scout doesn't have an air foil.... just a flat wing...
Just sayin.... kfm2.....
Flat is an airfoil, just thin and fully symmetrical.

All LAR designs if tail heavy suffer the same conditions. I don't think the KF step will solve the problem.

Some of my best flyers are flatties, as in flat airfoils, both flying wings, deltas and 3D designs. Depending on use, I leave the LE flat at 90% for my 3D machines and shaped for the slopers. I was always amazed that I could get amazing performance even with no power using a flat piece of foam.
Last edited by goldguy; Dec 04, 2018 at 04:18 PM.
Dec 04, 2018, 03:37 PM
flyin' fool
goldguy's Avatar
If you watch the Judi Seajet videos you'll notice some with flat wings and some with the KF airfoil. There's a good comparison.

Although there's little difference.
Dec 04, 2018, 04:21 PM
flyin' fool
goldguy's Avatar
Flat ……………..

Twisted Hobbys - Crack Wing (3 min 30 sec)
Dec 04, 2018, 07:25 PM
Retired CAD guy
birdofplay's Avatar
aaaargh ... Kids !!!
Last edited by birdofplay; Dec 04, 2018 at 07:32 PM.
Dec 04, 2018, 08:42 PM
Tony Audsley Retired Locksmith
Lockey's Avatar
Quote:
Originally Posted by nuteman
Just to add a bit to Tom's info: A swept wing with a larger root chord than tip chord helps give the elevons some more moment arm, increasing dynamic pitch stability
Hey nuteman, how they hangin man .. long time no see .. good to see you mate

You know guys .. I'm not saying the Scout flies bad, just a little twitchier than I like .. but its probably nothing else but trim and setup .. like most of my models I will get her flying good eventually .. I'm just a bit slow these days

Lockey
Dec 05, 2018, 12:14 AM
Registered User
Quote:
Originally Posted by Lockey
Hey nuteman, how they hangin man .. long time no see .. good to see you mate
Lockey
All good, thank God. Nice to catch up with your work
Been into wind surfing lately, when I get a spare moment. The sail is a wing, so it's related


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