This is a Hanger 9 ARF for Real Flight 6.5, and can be imported into ver 7.5.
The physics were developed in ver 7.5, so it will fly the same in both versions.
The motivation for making this RF model comes from the Alpha 40 I am modifying for electric power, as part of getting into real world flying.
As the model has been assembled, various component weights such as each wing, the dural gear, etc. have been measured to try and make the RF Alpha 40E as realistic as possible.
Various changes have been made from the original glow powered version:
1. Change to a tail dragger.
2. Mount the motor on a forward piece on plywood vs the supplied aluminum tube extensions.
The real world model is being made for basic training purposes, so for RF users some additional changes exist for appearance and ease of use:
1. The ESC is simply mounted on top of the fuselage, behind the firewall, but is not 3d modeled.
2. Added a steerable tail wheel, vs the actual plywood skid.
3. Due to the severe binding of the rudder push rod where it exits the fuselage, the rudder servo is being remotely mounted, near the fin, but is not 3d modeled.
Some of the details used on the Alpha 40E:
1. Modeled the AXi motor used (the new version 2 of that motor), including the prop shaft threads.
2. Used the 3d modeled tread wheels first made for the Sweet & Low Stik
3. Ball link on the rudder (used on the real plane vs the twisting of the control horn if using the recommended horn and clevis on that angled hinge line)
4. As RF6 and RF7 do not correctly simulate low voltage cutoff used in ESCs, the custom 4S pack approximates that by halving the capacity.
The APC prop selected is the same as will be used initially on the real model.
Flight characteristics:
The Alpha 40E is a Very easy plane to fly.
As is apparently true with planes having larger amounts of dihedral, the rudder control is strong and the ailerons are on the weak side.
If a sharp correction is needed to line up on final, the rudder will work better than the ailerons.
With the large lift of the flat bottom airfoil, the pitch is sensitive to airspeed.
An AV with a symmetrical airfoil and reduced/no dihedral is much more of a sport plane.
When taking off from grass, hold full up elevator, slowly advance the throttle and let the plane get some speed before easing up on the elevator.
If full power is applied without back stick, there will be a prop strike.
Thank you to the following people for all their help and encouragement on this build:
doug schulter
abaser
technoid
BrokeDad
uncle twist
boof69
Ron6234
legoman
Modeled by: Fly_electric
Color scheme: Fly_electric
Physics by: Fly_electric
The physics were developed in ver 7.5, so it will fly the same in both versions.
The motivation for making this RF model comes from the Alpha 40 I am modifying for electric power, as part of getting into real world flying.
As the model has been assembled, various component weights such as each wing, the dural gear, etc. have been measured to try and make the RF Alpha 40E as realistic as possible.
Various changes have been made from the original glow powered version:
1. Change to a tail dragger.
2. Mount the motor on a forward piece on plywood vs the supplied aluminum tube extensions.
The real world model is being made for basic training purposes, so for RF users some additional changes exist for appearance and ease of use:
1. The ESC is simply mounted on top of the fuselage, behind the firewall, but is not 3d modeled.
2. Added a steerable tail wheel, vs the actual plywood skid.
3. Due to the severe binding of the rudder push rod where it exits the fuselage, the rudder servo is being remotely mounted, near the fin, but is not 3d modeled.
Some of the details used on the Alpha 40E:
1. Modeled the AXi motor used (the new version 2 of that motor), including the prop shaft threads.
2. Used the 3d modeled tread wheels first made for the Sweet & Low Stik
3. Ball link on the rudder (used on the real plane vs the twisting of the control horn if using the recommended horn and clevis on that angled hinge line)
4. As RF6 and RF7 do not correctly simulate low voltage cutoff used in ESCs, the custom 4S pack approximates that by halving the capacity.
The APC prop selected is the same as will be used initially on the real model.
Flight characteristics:
The Alpha 40E is a Very easy plane to fly.
As is apparently true with planes having larger amounts of dihedral, the rudder control is strong and the ailerons are on the weak side.
If a sharp correction is needed to line up on final, the rudder will work better than the ailerons.
With the large lift of the flat bottom airfoil, the pitch is sensitive to airspeed.
An AV with a symmetrical airfoil and reduced/no dihedral is much more of a sport plane.
When taking off from grass, hold full up elevator, slowly advance the throttle and let the plane get some speed before easing up on the elevator.
If full power is applied without back stick, there will be a prop strike.
Thank you to the following people for all their help and encouragement on this build:
doug schulter
abaser
technoid
BrokeDad
uncle twist
boof69
Ron6234
legoman
Modeled by: Fly_electric
Color scheme: Fly_electric
Physics by: Fly_electric