TheFlyingBrit
Legendary member
Definitely got further with the build than expected.
Anybody else scratch building tonight?
- Thread starter K3V0
- Start date
Definitely got further with the build than expected.
JasonK
Participation Award Recipient
would depend which way the prop is rotating.
Monte.C
...
Keep this up and FT will want you on staff.
TheFlyingBrit
Legendary member
Right so a std CCW rotating prop would still use RH thrust, if I use a CW prop then the thrust angle is to the left. That means my pods upside down with LH thrust as I plan to use a conventional CCW prop
TheFlyingBrit
Legendary member
Crawford Bros. Aeroplanes
Legendary member
Anyone else notice how the Sea Otter looks like a sweet sloper with the power pod taken off?
TheFlyingBrit
Legendary member
Now I am confused how this Otter power pod is supposed to go, just been watching a video on you tube and the guy had the angle the same as on the Flight Test video.
ie looking down the motor is pointing to the left of the nose (assuming its a CCW prop in its normal configuration, reversed on the motor).
If it was a CW prop as opposed to a CCW, I could understand the logic the thrust angle would be to the left motor rotation is clock wise. But the Flite test video suggests its a std CCW prop so the thrust angle should be to the right ?
Anybody built one of these that can give me some insight ?
ie looking down the motor is pointing to the left of the nose (assuming its a CCW prop in its normal configuration, reversed on the motor).
If it was a CW prop as opposed to a CCW, I could understand the logic the thrust angle would be to the left motor rotation is clock wise. But the Flite test video suggests its a std CCW prop so the thrust angle should be to the right ?
Anybody built one of these that can give me some insight ?
BlockerAviation
Legendary member
Back in January, I built this mm scout for the challenge by @The Hangar . After I built it I said I would make it look nice. Well I did, but I forgot to post it so I guess it never happened... Untill now.
Here it is! It's an absolutely perfect backyard flyer that will do touch and goes for days!
Here it is! It's an absolutely perfect backyard flyer that will do touch and goes for days!
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OliverW
Legendary member
I love it. It's giving off major proctor antic vibes
TheFlyingBrit
Legendary member
Looks great but the pilot lets it down he looks a be wooden.
Tench745
Master member
I assume these pictures are of your build and that you're using a standard rotation prop. If so, this is the correct thrust angle.
Be sure to put some thread locker or something on that prop nut so it doesn't loosen; standard rotation props in the pusher configuration turn the wrong way for the prop nut to be self-tightening like it would in a tractor configuration.
Tench745
Master member
To elaborate slightly,
In a tractor configuration the motor is typically mounted ahead of the CG (center of pressure, center of lateral resistance, they all affect it, but we'll just simplify and call it the CG for this example.) so it needs to be angled to pull the NOSE of the airplane to the right.
In a pusher configuration, the motor is aft of the CG so it needs to be angled in a way so as to push the Tail of the plane to the left. Since the aircraft yaws around the CG this moves the nose to the right the same way as a tractor setup with right thrust would.
In a tractor configuration the motor is typically mounted ahead of the CG (center of pressure, center of lateral resistance, they all affect it, but we'll just simplify and call it the CG for this example.) so it needs to be angled to pull the NOSE of the airplane to the right.
In a pusher configuration, the motor is aft of the CG so it needs to be angled in a way so as to push the Tail of the plane to the left. Since the aircraft yaws around the CG this moves the nose to the right the same way as a tractor setup with right thrust would.
TheFlyingBrit
Legendary member
No the images are of someone else on you tube who built the Otter its not mine. looking down on the plane the motor is pointing to the left of the tail, therefore with a CCW prop in tractor operation ie reversed the thrust angle will be to the left hand side of the nose ! Is that correct ?
Normally a CCW prop in tractor configuration on the nose of the plane requires right hand thrust !
TheFlyingBrit
Legendary member
Got it now thanks, I have never had a motor with a left hand thrust angle on any of the ARFT pusher style planes I've bought in the past so it confused me
TheFlyingBrit
Legendary member
I agree with the thread lock good idea I will be sure to use some.
flyingkelpie
Elite member
It looks shockingly similar to the old Bleriot XI!
flyingkelpie
Elite member
How did the flight go? Looks really strong!
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