Tee Dee .049/.051 tuned pipe?

Awhile back Servimg (which is owned by the company that hosts this forum) had a problem where pictures were lost. I used Google image search to bring up some of the missing pictures (which I replaced on the thread). Ken would have to reupload the rest of them though https://www.coxengineforum.com/t2096-tee-dee-049-on-a-pipe

Check out this thread. http://www.rcgroups.com/forums/showthread.php?t=2391197

Look for the topic Tee Dee Performance crank where in the later threads 1/2Anut and I discuss tuned pipes.

http://www.rcuniverse.com/forum/speed-rc-nitro-boats-117/8498373-1-2a-size-dumas-boat-club.html








Using Sportwerks header etc for high performance Non SPI  .05 car engines.
Starting post #163 I push through to the next level
http://www.rcgroups.com/forums/showthread.php?t=1499068&page=11
My SPI AP .061 has done very well hitting 99.4mph.

You can take a candle stick reshape to the size pipe you want and pull carbon sock over per this pic. Once the resin is cured just heat up with a hot air gun and let the wax drip out the header pipe side into a throw away paper cup.

1/2A Nut wrote:You can take a candle stick reshape to the size pipe you want and pull carbon sock over per this pic. Once the resin is cured just heat up with a hot air gun and let the wax drip out the header pipe side into a throw away paper cup.

Now that's clever!! I like that idea. So simple yet so good.

Yes just use high heat resin / hardener the pipe gets oil spray inside actually helps keep things cooler. You can fabricate a
separate header / sleeve over the cox cylinder set up to block one exhaust port. Take note not to use an SPI cylinder.
I haven't made one myself but about 5 months back I bought two sizes in the carbon sock out of Canada before the shipping
prices went through the roof. I want to fabricate a 7in pipe for the TD .020. For .049 engines you need 11in from the
start of the stinger to the piston face. You want to use a silicon coupler so you can adjust at the header to tune the
engine to the prop. 22.5k static tuned to 25k in the air is the max you can go to safe guard the ball socket and rod. Providing
you are not pulling around a heavy plane. If the plane is more than 16oz you can not exceed 24k without risk to the engine.
Ideal target range for a piped 1/2A is 8oz to 12oz RTF.
Now for boat use the loads are different. You can needle to 25k static use a RC carb as throttle is an absolute must with boats.
When starting up you want to keep the rpm down till it hits the water and rap small metal tube around the head for water cooling.

@1/2A Nut

I want to build 2 pipes for a TeeDee .05 and .02 KillerPeeWee as described.
Can you please give me the exact dimensions you determined in millimeters for the construction of the wax molds?
Or maybe you still have drawings.

The carbon sock is so expensive that I don't want to build anything for the garbage.

Thanks in advance
Emanuel

Hi Emanuel,

This is a older thread my last response was in 2015, I have some updates.

Search and buy a Profi .8cc Tuned Pipe.
http://www.hobbyclub.com/index.php?main_page=product_info&products_id=1803&zenid=e850f369cfd563d802b6a591886c4cbe
I have 7 of these pipes two on boats 1 for bench testing engines and the others are on planes.

Study the shape and why it is proportioned that way it is. The shape can be reduced in size and
constructed in carbon fiber tube. The tube comes in small rolls different diameters and thicknesses,
ready to be stretched over a mold and layed up with high temp epoxy. I have two sizes in carbon tube sock
it was cheap in small 3ft. rolls.


Cox Killer Bee .049


TD .051


Cox TD .051


TD .020 manifold muffler with pressure tap needs a custom pipe.


TD .020 with .8cc tuned pipe for fun, more so function check of a RC throttled Venturi mod.
Needs a .3.5cc aluminum tuned pipe for .02 thru .030


AME Norvel .061


AP .061


Picco .05


Fuji .05


Fuji .05


SH .07


SH .07

Many other vids and flights on my youtube channel:

https://www.youtube.com/user/AmpAbuser?disable_polymer=true

How I did my pipe testing projects here:
https://www.rcgroups.com/forums/showthread.php?2684743-Speed-Planes-010-to-15-Size-Engines

Thanks for the answer,

I've been watching your videos for a while. I like them very much

Apart from the dealer in the USA, I have not seen these pipes anywhere.
But importing from the USA is no longer possible, the tax has become too high plus shipping costs I come to around $ 180.
The only option for me is to build it myself.
But I can't do that without exact measurements.
I need a drawing like the one in the appendix but with millimeters for .05/.049 and .02

Thank you glad you have enjoyed. Here is the .8cc measurements

You need to reduce down for volume .35 cc from there you will need a MRP mean reflective point
for required rpm per prop and plane type. This will allow you to have the correct pipe length
when you do the final design.

When I get a moment there is another photo I have for .010 and .020 engines.  

Y want 1 for m'y cars tee dee powered y need chort pipe Drawing desinged for 1\10size To 1\12 cars frame is Somting from plane wil fit cars use of flywheel is changing size lenght ????? Like the look of large pipe on speed plane

So first .05 draft.

I want to try that with a stencil.

Note understanding pipes / a longer stinger will help back pressure and retain more heat for cool weather flying.
A airborn pipe cools and increases wave cycle time making a MRP longer in duration. Cowled pipe will stabilize
internal gas temp / or rap. Just factor in cooling loss when selecting props.


TD .051
Example 1
HQ 4x4.5 /  8.1oz RTF
Peak 33,100 rpm / 141 mph pitch speed reached down wind pass
Static 25.8k rpm /  110 mph pitch speed
MRP 7.5


Example 2
APC 4.3 x 5.5N /  8.1oz RTF
Peak: 28,181 rpm / 147 mph PS / 143 mph per doppler down wind pass
Best static 21,962 rpm /  115 mph pitch speed
MRP 7.5"

The .15 size FAI speed pipes have interchangeable tips with different sizes. Some are 4mm and up. A smaller size gets on the pipe easier, but it can overheat easier.

I sourced this Profi .15 pipe owner had bought it in 1996
He sold it on the 29th to me for 70 and 10 shipping.
Never used he had two for sale, length 260mm / diameter 32mm
Novosibirsk, Russian Federation


More modern version from 2015

Old post y no wanted To chare  y just found a very Good setup for Reed valve engine using cars part from litle exceed blure bugy 1\16 nitro its tuned pipe is very Good for cox engine m'y test just surprise me how mutch gain in rpm y have wit m'y particular setup look mount on es bee for test
List of parts used blure bugy 1\16 nitro tune pipe ..gtp exaust collector modified large texaco tank ventury size of back plate Bolt a Bolt can enter tight in ventury wit trumpet look crankcase anodised red    wit old crankchaft from black widow || back plate plastiques from tink qrc engines Bolt from back plate also fit in ventury part from the backplate screen is on help fuel draw during starting of engine cylinder its like killer bee wit no spi cylinder uncut exaust port straight oem no modification To it the glow plug its from ??? Tink is qrc Not hi compression from killer bee or oem tee dee hi compression y try wit cox plug only wit that one engines run extrodinary fast rpm for new unmatched parts asembly y try multiple cylinder piston and boom waaaattttt after couple test finaly found right seting after multiples back plate model de one used ofer way To presurised the tank y use smal tube on litle niple next To it very smal hole covered wit larger tubing as see on picture no rpm reading no Good light outside today y try wit black on prop cant read tack it cylinder like furious asp wasp on 30% nitro Nice sound very powerful want To vidéo just dont no how To post vidéo cant Find wy it say its To big if y just vidéo like 2 second???

This is feasible once unloaded in the air, the rpm will sync to the pipe length well.
Slow NV peaking to avoid a lean out to a rare engine.



Oct 25, 2020
Kamtechnik Nelson Plug adapter test / Piped 1996 Killer Bee .049
APC 4.6x3 prop / best static 22,609 / 10.4oz thrust / 64 mph PS
.111hp - 82w / if this prop is used to fly it will unload and stage
on the pipe likely boost to unload at 27.5 -28k / 80mph PS
For speed a 4.4x4.5N  120 mph PS expected.

That Bad Boy is singing for some Air !!! Nice run

David, I think you have to load your video on to Utube and then copy/paste. I did it once from Facebook and it worked the same way. I did not have a Utube account yet. Still have not made any videos on Utbe yet, but likely will some day.

Y dont have YouTube acount tink of start Channel m'y self To share m'y experiment wit difrent engines y tink the engine in vidéo of 1\2a nut run lean can hear engines slowing down litle and look hard To set remember its impossible To change neadle in flight its wy use presure from tune pipe wil help for constant fuel and as the engines rev up on bench tes just try wit larger tube on tank and point To the prop close To it like 1 cm it wil help tink wel it worked on m'y tigermoth .049 look now its place close To its prop
Just try post test vidéo if posible