My Dad and couple of his friends bought one surplus for 900. I took my first fight on one. Took my last flight on a 777/300 after 47 years of flying . Wish we still had it .
After they had swept the wings, it still wasn't quite right, so they swept the top wing a bit more. Then the Swedish (the Swedish were the first to recieve them) found out, that the tips of the lower wings were rather close to the ground when taxiing, so the lower wing got a bit more dihedral. And the DH82 was done and got renamed to 82a. The DH Moth had foldable wings, and the Tiger Moth still use the wing folding hinges at the wing roots although those wings will fold nowhere.
Funny hearing center of lift, here in Canada I grew with a RCAF pilot father, he taught center of gravity, same thing in air cadets. Great explanation you made it easy to understand, great video.
Because centre of lift and centre of gravity may well not be in the same place. Change the angle of attack and you can change the centre of lift while the centre of gravity remains stationary.
Slightly swept back wings are used on many aircraft. This feature can already be found on WW I machines. This was often done to maintain stability around the yaw axis...
Ryan did the same thing with their PT-22 recruit. They swept the wings back to obtain proper center of gravity, And another advantage of having swept wings is that it tricks the air into thinking that the wing is bigger Because on a swept wing the air travels across more surface area.
@@davidhames319 You made teh false, claim, you should be able to back it up. The area of the wing does not increase. In fact, it decreased. And the wing becomes less efficient. the stall speed increases. if the surface area of the wing had increased magically, the stall speed for swept wings would be lower, and payload would be higher. You're no introducing the idea of spanwise flow that robs efficiency.
Very interesting...but it brings a question. If the ribs are not aligned with the airflow, then the original airfoil does not work as planned. Did dH change the airfoil accordingly for the swept wings?
As far as we know, the wings were not re-designed at all (other than the re-design of the wing root fixings). So the airfoil would work somewhat differently ! The story of how the DH82 Tiger Moth came about is covered in Graham Simons book, "de Havilland Enterprises" dehavillandmuseum.myshopify.com/products/dehavilland-enterprise
G'day, Wake up to yourselves. There is NOTHING at all "Strange" about the Wings of a Tiger Moth... Shifting the Upper Centre Section forward, to better facilitate entry and exit to/from the Front Cockpit, obliging the Wings to be swept back, SLIGHTLY...; to maintain the Centre of Gravity, was a Bog-Standard, Garden-Variety style of a Designer's Fudge - back in the day. Nothing at all "unusual" about it..., except that it was done for a Crew Dynamics and Ergonomics reason ; NORMALLY the usual reason for belatedly sweeping back the Wings was that the Factory was already set up to build Fuselages - and the Bumfeathers were found to be far too heavy..., so the Wing-Root Fittings were modified to shift the Centre of Lift to within the limits of flyability If you would dare to demurr, then get ahold of a Plan-View of a Short Sunderland Flying Boat. From memory, the Short Empire Class all had straight Wings, but the Sunderland was encumbered with a 4-Gun Turret under the Fin..., about a thousand pounds bolted retroactively into the worst place possible. So they cut and shut the Wing Roots, cranking the Wings back about 10° - which worked, and it also resulted in the Engines pointing Outboard and the Thrustlines being 20° divergent from Port to Starboard ; which Pilots found to be actually quite helpful whenever any Engine failed - because the Assymetric Thrust was already offset in the required direction to compensate..., meaning that less Rudder Bias was required to continue flying on any Heading. If you would perhaps like to stay in your Lane (?), then maybe try a Video explaining why all but ONE DH-87a was recalled and had their beautifully efficient Eliptical-Planform Wings amputated, and replaced with straight-edged Parallelogram-Planform Wings.... Because Eliptical Wings stall first out near the Tips, and if a DH-87a got a trifle slow in the Circuit it would stall one pair of Wingtips, and instantly spin in, trashing the DH reputation for safety. In 1978, when working at Olde Bowral Airfield, for Neil Cottee who owned a B-Model Hornet, among other old machines and Replicas...; and Cottee was renting Hangar-Space to a bloke called Gunnar Anderson, who had the only remaining A-Model Hornet on Earth. Gunnar told me the story of the Wingplan rethinking while he was swapping his Cylinder-Heads from standard 80/87 Octane to the 100/130 Octane variety - because even then 80/87 was starting to become scarce. Apparently his Aeroplane had been owned by someone who refused the offer of retrofitted Rectangular (defanged) Wings because he wanted to retain the extra Fuel Efficiency and the higher Cruise Speed emanating from the thinner and more efficient Aerofoils producing smaller Wingtip Vortexes. Just(ifiably ?) sayin', Such is life, Have a good one... Stay safe. ;-p Ciao !
I think the Tiger Moth is a very beautiful aircraft. I've built the Airfix model as a teenager. But stating "probably one of the most successful aircraft dH built" standing in front of a large image of the Mosquito :D I saw You looked over your shoulder having just said that.
![[ TEASER ] เงาะป่า - วงL.กฮ. | TMG RECORD](http://i.ytimg.com/vi/M4ObdFfcPww/mqdefault.jpg)
My Dad and couple of his friends bought one surplus for 900. I took my first fight on one. Took my last flight on a 777/300 after 47 years of flying . Wish we still had it .
After they had swept the wings, it still wasn't quite right, so they swept the top wing a bit more. Then the Swedish (the Swedish were the first to recieve them) found out, that the tips of the lower wings were rather close to the ground when taxiing, so the lower wing got a bit more dihedral. And the DH82 was done and got renamed to 82a.
The DH Moth had foldable wings, and the Tiger Moth still use the wing folding hinges at the wing roots although those wings will fold nowhere.
Funny hearing center of lift, here in Canada I grew with a RCAF pilot father, he taught center of gravity, same thing in air cadets. Great explanation you made it easy to understand, great video.
Because centre of lift and centre of gravity may well not be in the same place. Change the angle of attack and you can change the centre of lift while the centre of gravity remains stationary.
Enjoy how British & French engineers find simple solutions without major redesign or throwing money at it like some countries...
Slightly swept back wings are used on many aircraft. This feature can already be found on WW I machines. This was often done to maintain stability around the yaw axis...
the first aircraft with swept wings predates WW1 even.
Around he longitudinal axis you mean, in other words in the rolling plane
what a aircraft ive got the rc version it flies like a dream great fun
Very Interesting!
There's something special about De Havilland aircraft.
Ever since I saw the Dragonfly Rapide I've loved them
I learnt to fly in a tiger moth,in the RAAF,at Archerfield Qld,in 1956
Very informative 😊
Ryan did the same thing with their PT-22 recruit. They swept the wings back to obtain proper center of gravity, And another advantage of having swept wings is that it tricks the air into thinking that the wing is bigger Because on a swept wing the air travels across more surface area.
" it tricks the air into thinking that the wing is bigger Because on a swept wing the air travels across more surface area."
This is so wrong
@@SoloRenegade how?
@@davidhames319 You made teh false, claim, you should be able to back it up.
The area of the wing does not increase. In fact, it decreased. And the wing becomes less efficient. the stall speed increases.
if the surface area of the wing had increased magically, the stall speed for swept wings would be lower, and payload would be higher. You're no introducing the idea of spanwise flow that robs efficiency.
Would it be possible to have a talk about the engineers that went to and stayed in Canada during and shortly after the 2nd WW?
Thanks for the idea. We will put it on the list and see what we can do.
Very interesting...but it brings a question. If the ribs are not aligned with the airflow, then the original airfoil does not work as planned. Did dH change the airfoil accordingly for the swept wings?
As far as we know, the wings were not re-designed at all (other than the re-design of the wing root fixings). So the airfoil would work somewhat differently ! The story of how the DH82 Tiger Moth came about is covered in Graham Simons book, "de Havilland Enterprises" dehavillandmuseum.myshopify.com/products/dehavilland-enterprise
Correct, but the change is minor. the Tiger Moth is not the only aircraft to do something like this either.
Moth goes 100? Really? Not the one I’ve flown.
Thanks :)
I took a drink every time he said Tiger Moth ... 🤪
Instructor sits in the back.
Instructor sits in front. Solo from rear seat only so student is trained from the rear
G'day,
Wake up to yourselves.
There is
NOTHING at all "Strange" about the Wings of a
Tiger Moth...
Shifting the Upper Centre Section forward, to better facilitate entry and exit to/from the Front Cockpit, obliging the Wings to be swept back, SLIGHTLY...; to maintain the Centre of Gravity, was a Bog-Standard, Garden-Variety style of a Designer's Fudge - back in the day.
Nothing at all "unusual" about it..., except that it was done for a Crew Dynamics and Ergonomics reason ; NORMALLY the usual reason for belatedly sweeping back the Wings was that the Factory was already set up to build Fuselages - and the Bumfeathers were found to be far too heavy..., so the Wing-Root Fittings were modified to shift the Centre of Lift to within the limits of flyability
If you would dare to demurr, then get ahold of a Plan-View of a Short Sunderland Flying Boat.
From memory, the Short Empire Class all had straight Wings, but the Sunderland was encumbered with a 4-Gun Turret under the Fin..., about a thousand pounds bolted retroactively into the worst place possible.
So they cut and shut the Wing Roots, cranking the Wings back about 10° - which worked, and it also resulted in the Engines pointing Outboard and the Thrustlines being 20° divergent from Port to Starboard ; which Pilots found to be actually quite helpful whenever any Engine failed - because the Assymetric Thrust was already offset in the required direction to compensate..., meaning that less Rudder Bias was required to continue flying on any Heading.
If you would perhaps like to stay in your Lane (?), then maybe try a Video explaining why all but ONE DH-87a was recalled and had their beautifully efficient Eliptical-Planform Wings amputated, and replaced with straight-edged Parallelogram-Planform Wings....
Because Eliptical Wings stall first out near the Tips, and if a DH-87a got a trifle slow in the Circuit it would stall one pair of Wingtips, and instantly spin in, trashing the DH reputation for safety.
In 1978, when working at Olde Bowral Airfield, for Neil Cottee who owned a B-Model Hornet, among other old machines and Replicas...; and Cottee was renting Hangar-Space to a bloke called Gunnar Anderson, who had the only remaining A-Model Hornet on Earth.
Gunnar told me the story of the Wingplan rethinking while he was swapping his Cylinder-Heads from standard 80/87 Octane to the 100/130 Octane variety - because even then 80/87 was starting to become scarce.
Apparently his Aeroplane had been owned by someone who refused the offer of retrofitted Rectangular (defanged) Wings because he wanted to retain the extra Fuel Efficiency and the higher Cruise Speed emanating from the thinner and more efficient Aerofoils producing smaller Wingtip Vortexes.
Just(ifiably ?) sayin',
Such is life,
Have a good one...
Stay safe.
;-p
Ciao !
I think the Tiger Moth is a very beautiful aircraft. I've built the Airfix model as a teenager. But stating "probably one of the most successful aircraft dH built" standing in front of a large image of the Mosquito :D I saw You looked over your shoulder having just said that.
I thought the same thing. Not to mention the Beaver, Comet, and Vampire.
I thought the same thing. Not to mention the Beaver, Comet, and Vampire.