Author Topic: Modified Black Widow (Read 1403 times)

Dwayne · « **on:** July 05, 2010, 07:23:43 PM »

Just thought I'd share a couple of pics of a Black Widow I bought a few years ago, it's the one at the end of Cox, plastic tank and backplate, I ordered a black case from Cox international press fitted some alum tubes into the tank and sealed the original fill/overflow holes, now at least it sorta looks like a Black Widow and it will run inverted.
Thanks

kenneth cook · « **Reply #1 on:** July 06, 2010, 03:26:12 AM »

Dwayne, use caution with the way your needle is set up there. If that engine quits while your inverted, you could surely lose that needle valve. Ken

Dwayne · « **Reply #2 on:** July 06, 2010, 05:38:59 AM »

Thanks Ken
Ya know you're not the only one who's said that so I guess I'll be careful but you know I'm sure there were designs in 60's and 70's that had the engine set up this way, or did I um partake in to much combustible spirits

john e. holliday · « **Reply #3 on:** July 06, 2010, 06:46:57 AM »

I see the needle assembly is part of the back plate. All you have to do is rotate it 90 degrees and move the pickup inside the tank. Other wise you will be replacing the needle every time the plane goes in inverted. Leave the tank itself as is.

don Burke · « **Reply #4 on:** July 06, 2010, 09:53:03 AM »

Rotating the backplate gets the needle horizontal and out of the way of your fingers in the exhaust, as well as saving it in case of inverted oops. Also if you adhere to the advice of "MR COX engine himself, Larry Renger", for some reason they run a little better if the cylinder is pointed toward the control lines instead of away from as most do.

Larry Renger · « **Reply #5 on:** July 06, 2010, 10:05:49 AM »

If you do the needle opposite the cylinder thing, but the cylinder toward the center of the circle, it is a bear to get the fuel pickup hose to the outside! They only run very slightly better that way and well enough with the cylinder outboard.

minnesotamodeler · « **Reply #6 on:** July 07, 2010, 04:30:01 PM »

Only thing is, rotating the backplate 90d. means drilling more mounting holes--the layout ain't square.

john e. holliday · « **Reply #7 on:** July 08, 2010, 10:59:35 AM »

Looks like enough ply in the pic to rotate the back plate. Use small sheet metal screws to hold the engine in place. I found sheet metal screw hold better than wood screws. Usedn them for years until I started Mouse Racing. But, then the other day I just discarded the remains of an old mouser that still had the sheet metal scresws holding the engine in place.

Dwayne · « **Reply #8 on:** July 08, 2010, 11:39:29 AM »

Thanks guys, for now I'm going to live dangerously and leave it as is, hopefully I'll be ok, famous last words huh? lol

Bill Little · « **Reply #9 on:** July 08, 2010, 12:42:00 PM »

Quote from: Dwayne Donnelly on July 08, 2010, 11:39:29 AM

Thanks guys, for now I'm going to live dangerously and leave it as is, hopefully I'll be ok, famous last words huh? lol

\
Go for it! I never did try and rotate the NVA out of the way, guess I was just lucky!

Big Bear

George · « **Reply #10 on:** July 10, 2010, 12:30:06 PM »

I remember guys mentioning that they ran the engine with cylinder and needle outboard, fill and vent on top horizontally. The only thing changed from box configuration was the pickup inside the tank.

You could also have cylinder and needle inboard with vents on top horizontally plus pickup tube change. I THINK this is one of Larry Renger's configurations.

I have not tried it either way, I just keep it all upright.

George

Bill Little · « **Reply #11 on:** July 11, 2010, 12:42:29 AM »

Quote from: George Bain on July 10, 2010, 12:30:06 PM

I remember guys mentioning that they ran the engine with cylinder and needle outboard, fill and vent on top horizontally. The only thing changed from box configuration was the pickup inside the tank.

You could also have cylinder and needle inboard with vents on top horizontally plus pickup tube change. I THINK this is one of Larry Renger's configurations.

I have not tried it either way, I just keep it all upright.

George

HI George,

I have rotated the jug to face outboard, just never the back plate. Supposed to aid outboard weight and cut down on the need for WT weight. Who kows!

Mongo

Author Topic: Modified Black Widow (Read 1403 times)

Dwayne

Modified Black Widow

kenneth cook

Re: Modified Black Widow

Dwayne

Re: Modified Black Widow

john e. holliday

Re: Modified Black Widow

don Burke

Re: Modified Black Widow

Larry Renger

Re: Modified Black Widow

minnesotamodeler

Re: Modified Black Widow

john e. holliday

Re: Modified Black Widow

Dwayne

Re: Modified Black Widow

Bill Little

Re: Modified Black Widow

George

Re: Modified Black Widow

Bill Little

Re: Modified Black Widow