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Post  Marleysky Mon Oct 02, 2017 2:41 pm

I actually have to sent out a big THANK-YoU! to Bob (RSV1cox). He boxed-up and sent Roddie  and I some of his Testor/McCoy engines to be used as parts  donors.  I had a little time to play around with them today and found a neat way to fix a problem we all run into  now and then. Needle Valves that have broken off inside the spray bar. I've tried drilling them out with a Left Handed Drill, with out much success. this time, with Bob's donated engines I tried something a little different.  Heat and a soft but strong bamboo stick ( Chop Stick, thank-you,  Mr Woo Take out Dinners)  I heated the broken end of the NV with a Soldering Iron( just to loosen any old sticky castor) , then pressed the flat pointed end of the chop-stick on the ragged end of the needle valve and turned it to the left, spinning it between my thumb and finger. After a few spins the broken NV had exposed enough threads I could grab on with needle nose pliers and extract the broken stub of the NV.  The second engine was a bit more troublesome, but after running the point of a #11 blade around the ID of the spray bar, and rocking the blade back and forth on the broken NV to create a "lip" for the Bamboo to grab on to, it too spun out enough to grab with the NN pliers and totally remove the stub.  WOW two outta Three, that ain't bad!!

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Anyone notice anything "Different" about the glow head on the engine on the Left?
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Post  Oldenginerod Mon Oct 02, 2017 4:20 pm

Yeah, left hand one is the early Wen Mac version glow head, MkX engine. The type with the flats took over with the acquisition by Testors I believe. No, the left one is not a Cox head. They don't fit.
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Post  rsv1cox Mon Oct 02, 2017 5:39 pm

Now I want 'em back..... Smile Smile

I thought that one with the different head would draw some interest. As you know the one with the spinner is from an Airacobra. I have so many of the dang little things, I'm just happy to share and duplicates of all I sent to you and roddie.

Have fun guys, I know I did when I first got them. Congrats on removing those broken needles too, maybe I learned something.

Bob
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Post  roddie Mon Oct 02, 2017 6:51 pm

That's a cool trick Rene! It might work on other types of broken needle-valves too.
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Post  Oldenginerod Mon Oct 02, 2017 6:58 pm

roddie wrote:That's a cool trick Rene! It might work on other types of broken needle-valves too.

Being loose enough to undo like that probably means they broke off in a crash, meaning te needle wasn't bottomed with the engine running. If the needle was closed and was bumped, breaking it off, or snapped due to overtightening, I wouldn't like your chances.
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