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Landing gear further aft of the CG


B52

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What are the consequences if the main landing gear was further aft of the CG say below the engine ?

 

It could allow use of a bigger diameter prop and reduce the chance of prop damage during takeoff and landing.

 

It would Increase load on the nose wheel,  increase load on front wing during take off  and therefore increased takeoff speed to get the nose up…But once the nose is up the plane will behave same as a conventional canard.

 

Looking at the landing...>> 

 

dose't look too bad.

 

 

Any input and reading links appreciated.

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You would need to accelerate to a speed at which the canard could lift almost the entire aircraft weight before it could rotate. Impractical.

Aerocanard (modified) SN:ACPB-0226 (Chapter 8)

Canardspeed.com (my build log and more; usually lags behind actual progress)
Flight simulator (X-plane) flight model master: X-Aerodynamics

(GMT+12)

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You would need to accelerate to a speed at which the canard could lift almost the entire aircraft weight before it could rotate. Impractical.

Agreed, we look for solutions to decrease our takeoff and landing speeds, not increase.

 

Still, you could increase the length of the canard, but that would require changes to the main wing airfoil, or possibly increase the distance between the two wings. It would be a completely different aircraft in need of professional review and testing. Not something I would recommend.

 

Find out how the E-Racer was modified so that it doesn't need its nose retracted when parked. http://www.eraceraircraft.com

Jon Matcho :busy:
Builder & Canard Zone Admin
Now:  Rebuilding Quickie Tri-Q200 N479E
Next:  Resume building a Cozy Mark IV

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How does the flying car video relate to your proposal?

Wheels are at rear end.

 

You would need to accelerate to a speed at which the canard could lift almost the entire aircraft weight before it could rotate. Impractical.

You could have an extendable nose wheel similar to navy planes say at 45Knotes on the runway the nose wheel is extended (pump up suspension)  this will get the plane to a lift-off pitch, the tricycle will disengage the tarmac in one go. (B52)  During landing as the speed is reduced the front wing will stall early, the extended nose wheel will soften the drop.  The nose wheel is then lowered for taxing

The only issue would the added AFT weight to the already sensitive trim.

 

Extended_Nose_wheel.jpg

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OK, maybe you could do that... you'd also need to design the structure to have the main gear there, lots of follow-on effects. Worth it to fit a slightly longer prop? Nah. :)

Aerocanard (modified) SN:ACPB-0226 (Chapter 8)

Canardspeed.com (my build log and more; usually lags behind actual progress)
Flight simulator (X-plane) flight model master: X-Aerodynamics

(GMT+12)

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You could have an extendable nose wheel similar to navy planes say at 45Knotes on the runway the nose wheel is extended (pump up suspension)  this will get the plane to a lift-off pitch, the tricycle will disengage the tarmac in one go. (B52)  During landing as the speed is reduced the front wing will stall early, the extended nose wheel will soften the drop.  The nose wheel is then lowered for taxing

The only issue would the added AFT weight to the already sensitive trim.

 

Extended_Nose_wheel.jpg

 

Hard to get access to a good steam catapult anymore.

Let us know how it goes.

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