AMF Wen-Mac parts or help

Pat, its a Testors, not Cox. There were several companies manufacturing plastic 'ready to fly' control line gas powered airplanes in the 60's: Comet, Aurora, Gilbert, Wen-Mac & Cox.

To use with a throttle, you'd need the throttle assembly and then basically connect that to a servo.

Mark Boesen wrote:Pat, its a Testors, not Cox. There were several companies manufacturing plastic 'ready to fly' control line gas powered airplanes in the 60's: Comet, Aurora, Gilbert, Wen-Mac & Cox.

To use with a throttle, you'd need the throttle assembly and then basically connect that to a servo.

I saw a picture of the throttle assembly on a parts list, the throttle is a muffler/throttle assembly the cylinder has to be modified or a throttle cylinder needs to be made or found the fins above and below the exhaust port are missing. I think someone was offering up both styles of engines on ebay, but sans throttle. I'm sure I can figure it out. According to the 0.049 users group the Testors label wasn't until 1966, I know I got mine in 1964 I remember it came with a can of COX fuel, was almost certain it was a Cox oh well guess it was a Wen-Mac then, at least that is what the motor has on it. They also had the glow plug thread specs., .5575 40tpi, I measured .555 36tpi, my guess is 14.150 X 0.75 is most likely the correct thread, since it is a standard extra fine thread.

Finding out a lot of information.

Thanks Pat

Cribbs74 wrote:What does a MKIII look like? I several testors/wen mac engines that I have no use for. $20 including shipping and they are yours.

How do you want me to pay for it, I will take them, maybe something I can work with.

pat

Kim wrote:

goody wrote:

Kim wrote:Think so...but also thought Pat was going for as original as possible.  We'll see when he checks in...

Kim the Mk XIII picture you posted is the right one.   The head in the far right is the one I have left.   I use to buy my heads from Testors I think, don't really remember.   I at one time had several heads, and a cylinder but they have been lost in 50 years.     According to the 0.049 users group the Mk XII and XIII are interchangeable, mfg dates 1964-1966.   The difference in the motors is Testors on the Mk XII.    Heads and a needle valve or two would be good, or if you want to get rid of it I can take the whole motor.      I would like to be able take a burned out plug and adapt it to use a standard short 1/4 in. plug.    I have both pieces of my needle valve and can possibly silver braze it back together.   I can also turn a new one from 3/16" bar but the compound taper may be a problem, very crude machinist skills, and a Unimat micro lathe.

pat  

Hey Pat,

Yeah the poor Wen Mac needles AWAYS took it on the chin, and they're the one item I have to swap around to run my engines.  There are probably some in Ron's batch, so you should be in business.  If you think you have a use for this engine, I got it turning easy with good compression, and the spring starter IS good! (Miracles!)

Anyway. let me know and I'll shoot it to you on the cheap !

Waking Kim

I will take it, if for nothing else then parts. I found the prop for the engine yesterday, surprise surprise, but no heads.

pat

You got it. Please PM me your mailing address, and I'll get it on it's way !

Kim,

I picked up a couple of scrappers on ebay, both seized, one testors throttle head Mk XII (broke crank), and one Wen-Mac Mk XIII, good needle valve. Haven't tested the heads to see if they will work.

Were you going to send me some parts, how much you need for the shipping??

pat

Yo Pat,

You should get that core engine and it's two heads tomorrow or so.  I included the notched-style head in case you could use it as-is or, as a spare practice part for your experiments in threading a plug into the thing.

I sent it on the cheap for 2 bucks and change so the money's no factor...just do a post on your progress if you get it going!

Later!

Will most certainly post progress with pictures in case someone else wants to duplicate my efforts. I want to remember the old glow heads burned out frequently, mostly when the engine started and the clip wasn't jerked off immediately. I went though a bunch of heads.

pat

What voltage were you using?

Cribbs74 wrote:What voltage were you using?

1.5 volt dry cell lantern battery, I used to fight that over and over.

Will be making my own fuel now for a few runs, I have the ethanol and castor oil. When I flew in college the club made fuel in a 25 gal drum, several of the guys in the club raced dragsters too, we usually flew every weekend, 3 or 4 combat sessions burns up a lot of fuel, we flew 1/2A and 1A mostly, although one of the guys had a Stearman biplane scaled for a barbie doll, somewhere around a 5-6 foot wingspan, Enya 90 was the engine, 14" prop, he flew wire control on 80# test steel shark leader with a throttle.

The club had roughly 60 flyers, we usually had 3 circles running at any given time. I still have the wing from my 1A
Zero, it didn't make it through the last battle.
I don't remember the exact mixtures but will start with 80/20 then see if I can get some nitro to add to it. I don't want to run hotter than 5% nitro or will smoke the old engines.

pat

ive got a few of those it uses the same head as the fibreglass pipe bomb wich i have several

iff interested shoot me a PM

dont forget those engines use a thin aloy gaskit outher wise the compression is to hi it mite explain the glow plugs blowing quickly

ekitten2 wrote:dont forget those engines use a  thin aloy gaskit  outher wise the compression is to hi   it mite explain the  glow plugs  blowing quickly

Actually the Wen-Mac heads with the flats do not use a gasket, they have a 3mil aluminum ring turned into the base of the head and that acts as the gasket. The other style heads I will have to check to see if they have the ring. So far I have taken apart all 4 of the engines I have and none have a gasket. I plan on using a thing copper gasket on the twin and the singles.

pat

yes i knew the newerfiberglass cased engines use a mschined ridge as gaskit

Cribbs74 wrote:What does a MKIII look like? I several testors/wen mac engines that I have no use for. $20 including shipping and they are yours.

Ron, Last I knew you were out of the country until Nov. 24, so I finally got around to posting you back. I have sort of started the design for the build. Let me know where to send the $20 to for the parts you have.

pat

Pat,

I sent you an email.

Ron

If anyone has any broken or worn out Wen-Mac .049s of any year I would be interested in buying them.
Happy to pay shipping etc. and can do Paypal.

OK, I just bought one of these that is in real bad shape,should be fun to restore.I need to fabricate a cowl canopy and elevator.one good thing , the engine stil has the needle , That seems to be a rareity in the wen mac engines.

how many would you want?

akjgardner wrote:OK, I just bought one of these................

One of these what? Sounds like you got a plane. What is it?

Oldenginerod wrote:

akjgardner wrote:OK, I just bought one of these................

One of these what? Sounds like you got a plane. What is it?

wen mac AT6