Needle Valve Protector

[Casey]

Hi Everyone

Which needle valve protector design should I adopt between these 2 designs or are there even better designs?

[GERALD WIMMER]

Hello From my experience it is easier to make a needle valve assembly (NVA) less vulnerable then it is to make a protector that will survive all manner of crashes and inverted landings. Rotate the NVA towards the case or shorten the needle down or use a remote needle set up. A remote NVA set up works better on pressure then suction feed. Look at a few current combat models. Regards Gerald

[bob whitney]

what plane are u putting it on

[Brad LaPointe]

If it’s possible to install a Fora type NVA this works very well. Fine threads and very well protected.

Brad

[FLOYD CARTER]

Make a half circle of 1/16" piano wire and mount it into the maple motor mount.  Naturally, the wire must be taller than the NVA

[Richard Entwhistle 823412]

Stop landing upside down!

Later
Richard

[Peter in Fairfax, VA]

I'd vote for the short needle.  Super Tigre and PA NVAs accommodate that well.

[pat king]

The ENYA spring shaft needle valve does not have a problem with inverted landings when the engine is mounted on it's side. The "pilot in training" landed my Ringmaster inverted many times.

Pat

[Casey]

I putting it on a combat wing

[John Given]

I putting it on a combat wing

If you are using a bladder then definitely use a fine thread remote NVA.  It can be mounted for crash damage resistance and it gets your finger away from the prop.

[Ken Culbertson]

Get yourself a McCoy.

Ken