Planes > Jets

Which EDF model for a learner?

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Happy Days:
Thanks for your commiserations guys. (I’ve not long been out of hospital following a minor operation and the tumble has left me feeling a tad sore at the moment. :( ) Hey-Ho!

Ron, with xmas coming up why don’t you splash out and get yourself a little something to play with when you cant get to the slopes, or when there’s no wind? (Every home should have one! :) )


--- Quote ---Yep, slender delta's are typically pretty well behaved at low speed and can slow down a lot more than non delta planes with similar wing loading.
At high angle of attack the airflow comes around the lead edge and rolls into a vortex over each wing. That gives you a big stable low pressure region over each wing and allows a very high lift coefficient. Drag gets very high when flying it like this but that's helpful for landing.
--- End quote ---

Now that is very interesting information Aidan, :?:  and answers the question as to why the model is so surprisingly well behaved during launch and landing. I really wasn’t expecting her to have such good low speed manners.
It does seem that you get the best of both worlds with Delta wings, the benefits from a high wing loading with a low landing speed.

So,……what’s the downside of Delta wings Aidan? There must be some, otherwise we would see more of them.
Thanks for your info by the way.

K.

Aidan:

--- Quote from: "Happy Days" ---....So,……what’s the downside of Delta wings Aidan? There must be some, otherwise we would see more of them.
Thanks for your info by the way.

K.
--- End quote ---

In normal level flight they won't be nearly as efficient as a higher aspect ratio wing which means less range and/or more fuel. Where deltas come into their own is for transonic/supersonic planes where you need the wing sweep. Compared to a chevron wing like the English Electric Lightning, a delta gives you lots of wing volume (somewhere to put fuel, landing gear & weapons) and a reasonable landing speed.

For model planes where efficiency isn't a big issue they work well.

Aidan

Happy Days:
Thanks Aidan,…….I’ll remember that. 8)  
(I’ll probably have to ask you some more questions later,…….when I think of them! :lol: )

K.

Ron:
What! :shock:  :shock:
By myself a Chrissy Present?
Such reactionist ideas Keith.
I have enough trouble with the thought police as it is :(

On the other hand.... I could blame you now you've actually voiced my thoughts  :twisted:  :twisted:

Heh, heh, heh...

Ron

Happy Days:
Go on Ron,……..be a devil :twisted: . .just for christmas. :D

After all,   you don’t want ANOTHER inflatable doll do you? :?:

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