Official FlightLine 1600mm P-51D Mustang Thread

[xviper]

I have searched for years to find a 4-blade prop that would work on the FMS 1700mm P-51 but to no avail. The closest I came was this German company but their props are very expensive and may not be in the size I need.

https://www.ramoser.de/home_d/varioprop_d/varioprop_d.html

Most one-piece 4-bladers don't even come close to the size needed for the Mustang.

[Elbee]

Most one-piece 4-bladers don't even come close to the size needed for the Mustang.

X,

What would be the ideal size in a 4-blade prop for this model?

Have you changed out the electric motor for one with more grunt/RPM?

Back in the 'days or yore' we built larger 4-bladed props from 2 bladed props.

These were 'Rev-Up" maple props with the wide blades.

Sometimes by notching one against the other and using epoxy and metal pins to build one prop and sometimes by machining/building a back plate that would allow for using a portion of the prop & hub of four 2-bladed props.

I never had one come apart, but it certainly could depending on use/abuse.

Best, LB

[xviper]

X,

What would be the ideal size in a 4-blade prop for this model?

Have you changed out the electric motor for one with more grunt/RPM?

Back in the 'days or yore' we built larger 4-bladed props from 2 bladed props.

These were 'Rev-Up" maple props with the wide blades.

Sometimes by notching one against the other and using epoxy and metal pins to build one prop and sometimes by machining/building a back plate that would allow for using a portion of the prop & hub of four 2-bladed props.

I never had one come apart, but it certainly could depending on use/abuse.

Best, LB

Hugh and I were referencing the FMS 1700mm 'Stang. Mine is already modified with the power system from the Flightline 1600mm P-51. As such, I'm using the stock F/L prop (16x12x4) because I worry that the stock FMS prop might come apart given the F/L motor spins ~100kv faster. Ideally, I would have liked to have used the stock sized FMS prop (17x10x4). "Rule of thumb" - the F/L prop would be equivalent to a (17x11x4), so in that sense, the stock FMS prop "might" be able to take it but I didn't want to chance it as I've had a similar prop on the FMS 1700mm Corsair explode on 2 different models. One day, if I find a way to manufacture that metal brace that comes with the stock F/L and make it fit into the stock FMS prop hub, I'll give it a try.
Hugh is thinking of going with the Eflite Power 60 motor (470kv), 80kv more than the F/L motor. Using the stock FMS prop could be a risky proposition. However, having said that and knowing that RCInformer did try the same V1 FMS P-51 on 7 or 8 cells and it lived to tell the story would make me think that the stock FMS prop might take it. I'm just too chicken to try but with the metal F/L type brace, I would chance it.
I've read some modellers have considered that the proper "scale" prop for the FMS plane is closer to an 18" 4-blade and for the F/L plane, a 17" 4-blade. IMO, the F/L P-51 would look amazing with a bigger prop but one would have to take extra care so as to not nose over and break all kinds of stuff in the nose. I don't have the calculations to confirm or deny these "claims". The pitch for such props would be dependent on the motor used based upon an E-calc determination, something I'm not well versed in performing.

[Elbee]

xviper..

Makes sense, it would seem reasonable to think one could build props, even scale sized props, given current technologies.

As stated, we used to build 'em from maple 2-bladed props.

I still have a 3-bladed and a few 4-blade props I made from those days.

Best, LB

[xviper]

Those home made 4-bladers are spectacular.

[nuts-n-volts]

Scale Hamilton Standard for this 63" Mustang would be 19"

[Elbee]

Those home made 4-bladers are spectacular.

Thanks, X.

I ran those on a OS .40 FSR ABC and a OS .91S 4-Stroke.

A little much for the .40, though performance was really good and the drag at lower throttle was realistic.

The 3-blade was never run on an engine, as I didn't finish the model, Pica (Dave Platt design) Spitfire with a OS .61 FSR ABC.

Still have the partially built kit, wing needs top sheeting and fuselage needs empannage completed.

Big fun for little money in those days.

Best, LB