Re: Cox Spyder/ Queen Bee 074

aspeed Wed Oct 23, 2019 9:44 am

There were some guys drilling with a drill press, then using a particular size Phillips screwdriver which gives the diameter and angle, and then tapping. This was all done without removing the piece so it is aligned. It would be better to just get the Kamtechnik head, or find someone with a lathe if you don't have one.

getback Wed Oct 23, 2019 10:39 am

Thanks aspeed , No lathe so just wondering and yes get from Kamtechnik and the testing 1/2 a nut put in to them would bee better . Small Cox Logo

Surfer_kris Wed Oct 23, 2019 12:21 pm

ticomareado wrote: I once read somewhere that that you can seal them in a tapped out adapter head with RTV sealant in the threads.

Yes, RTV helps but you still need a lathe to fix the adapter-head, here is a link to that discussion on RCU: The great glow plug run-off

bilchiri Sat Oct 26, 2019 5:33 pm

getback wrote:That sounds like a PIA to me with the silicone , I would bee interested in how to adapt one without a lathe and not mess up the outside ?

you can try the easy way......

test stands - Cox Spyder/ Queen Bee 074 - Page 2 20191015

aspeed Sat Oct 26, 2019 9:04 pm

It will run that way, but there will be a substantial loss of power from the stock TD head. The turbo plug will be about the same as stock, maybe better.

1/2A Nut Sat Oct 26, 2019 9:23 pm

aspeed wrote:It will run that way, but there will be a substantial loss of power from the stock TD head. The turbo plug will be about the same as stock, maybe better.

Alan this turbo plug adapter is far from stock power...

Cox Queen Beast .074 / Kamtechnik Turbo Plug Adapter Test
Works with the .074 and Tee Dee .09
APC 6x3
Static Peak 19,783 rpm / .214 hp - 158w / 56.2 mph pitch speed
Impressive 23.3 oz thrust!
OS P4 turbo plug / 25% nitro / 20% oil / two head shims as I recall.
This is now a viable power house well exceeding the TD .051

Greg bought a new CNC machine and has been setting it up once happy with it I
expect these will show up on his web page.

Small Cox Logo

Rare to actually find some flying vid with these engines:

MA 6x3 prop unloaded to 17k range

aspeed Sat Oct 26, 2019 9:55 pm

That will be interesting to see what Greg comes up with. What do the numbers compare to with a stock TD plug with one washer? I ran mine with a bigger prop which I thought was about right. A 6 - 3.5 MAirscrew prop using no muffler and only 10% fuel. If I am reading this correctly, the head with the standard plug in it went 14,600 and 16,000 with the TD head. It says open muffler, and 15,400 with no muffler. Might be wrong running faster with the opened muffler from open exhaust? Still pretty good I think. I don't run really small props normally. These things are pretty old and parts are fairly hard to get.

1/2A Nut Sun Oct 27, 2019 5:14 am

Per Sceptreflight engine reviews they have two posted see link for reviews.
It was said the engine runs best with a 6x3
http://sceptreflight.com/Model%20Engine%20Tests/Index.html

With muffler / Kamtechnik prototype turbo plug per test vid.
APC 19,783 rpm / + 1,783 rpm over the best number below.

Vs

Cox Super Power Fuel #551 with muffler
Cox 6x3
16.2k slightly rich
17.5k slightly lean

Other brand 10% nitro
Cox 6x3
16.7k slightly rich
18k slightly lean

2nd write up:

6x3 K&W prop
16.9k

FYI
Reviews on the Tee Dee .049 / 6x3 props
1st write up - Top Flite Nylon / 18.4k
2nd - Top Flite Nylon / 18.3k
3rd - Cox Grey 18.1k
4th - Unknown prop 17k

aspeed Sun Oct 27, 2019 9:41 am

Those old reviews likely were with the plug head, and the APC was not born yet. The Kamtechnik would be the way to go. That song from the Mambo video will be in my head all day. I have the Queeny in this plane, still have not flown it, so no video here either.

test stands - Cox Spyder/ Queen Bee 074 - Page 2 Jr_fal10

bilchiri Sat Nov 02, 2019 6:33 pm

6 flights since the Renaissance, 2 oz. tank 8 minutes flight,it's like having a new engine, fitting is loosened from the exhaust, exhaust metal too weak?, here the video https://www.youtube.com/watch?v=jqqceE_85Og

Scratch049 Thu Nov 07, 2019 1:28 pm

Aspeed-
Is that a Jr Falcon?
Great looking air frame.
Scratch...

aspeed Thu Nov 07, 2019 4:55 pm

It is a swap meet item that I got mostly for the motor which did not run for some reason. Sorted it out, pinched fuel line, it had an AM radio so it just sits. I am pretty sure it is a Jr Falcon, likely a kit. I should get it going, it wouldn't take much, have an Orange receiver somewhere. It isn't a top priority. I keep getting swap meet stuff, I have so much that I don't know where to start.

Scratch049 Fri Nov 08, 2019 12:02 pm

If it is, I just down loaded the plans from Outerzone.
Shows a Cox Golden Bee and has a 37" wing span.
I like the look.

getback Sat Nov 09, 2019 6:05 am

Crazy flight bilchiri , Love the music Windy Mommys and the papies Very Happy

bilchiri Sun Mar 01, 2020 1:21 pm

https://www.youtube.com/watch?v=gAawoQzCNZc

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Cox Spyder/ Queen Bee 074