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Tee Dee .049/.051 tuned pipe? Babe_b10
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Tee Dee .049/.051 tuned pipe?

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Help! Tee Dee .049/.051 tuned pipe?

Post  duke.johnson on Fri Jul 31, 2015 12:47 pm

I'm currently in the plannig stages of a Tee Dee .049 hydroplane project. The project is in need of a tuned pipe exhast system. I've searched CEF for info and found a thread stated by Ken, but the pictures are not linked to the thread anymore. Anyone have pictures or info of a tuned pipe? Preformance results? Know where I can find one or how to make one?

I have some friends who race boats and they think this is a good project, but think the little engine needs a pipe.
Thanks
Guys
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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  Jason_WI on Fri Jul 31, 2015 1:06 pm

There was a guy selling carbon fiber tuned pipes on ebay a while back for Cox. I don't have a link to the seller though. You might be able to make one from a Cox GTP Nissan Maples throttle exhaust collector and then need to just find a small tuned pipe and couple with silicone tubing.

http://coxengines.ca/cox/www.mh-aerotools.de/airfoils/javapipe_en.htm

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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  Admin on Fri Jul 31, 2015 4:13 pm

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

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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  balogh on Sat Aug 01, 2015 12:07 am

Look for the topic Tee Dee Performance crank where in the later threads 1/2Anut and I discuss tuned pipes.
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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  1/2A Nut on Sat Aug 01, 2015 12:51 am

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






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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.

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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  1/2A Nut on Sun Aug 02, 2015 3:38 pm

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.

Tee Dee .049/.051 tuned pipe? Hf983710
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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  dinsdale on Sun Aug 02, 2015 9:13 pm

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.

Tee Dee .049/.051 tuned pipe? Hf983710
Now that's clever!! I like that idea. So simple yet so good.
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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  1/2A Nut on Sun Aug 02, 2015 11:06 pm

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.

Tee Dee .049/.051 tuned pipe? Wu595710
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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  emanuel on Thu Oct 01, 2020 7:01 am

@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
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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  1/2A Nut on Thu Oct 01, 2020 7:46 am

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

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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  emanuel on Thu Oct 01, 2020 11:40 am

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

Tee Dee .049/.051 tuned pipe? Fospip10
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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  1/2A Nut on Thu Oct 01, 2020 1:17 pm

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.  

Tee Dee .049/.051 tuned pipe? Imag8827

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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  davidll1984 on Thu Oct 01, 2020 7:46 pm

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 Thumbs Up
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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  emanuel on Fri Oct 02, 2020 9:27 am

So first .05 draft.

I want to try that with a stencil.Tee Dee .049/.051 tuned pipe? Pipe-010
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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  1/2A Nut on Fri Oct 02, 2020 10:48 am

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"
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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  aspeed on Fri Oct 02, 2020 2:09 pm

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.
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Help! Re: Tee Dee .049/.051 tuned pipe?

Post  1/2A Nut on Fri Oct 02, 2020 10:07 pm

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
Tee Dee .049/.051 tuned pipe? S-l16043

More modern version from 2015

Tee Dee .049/.051 tuned pipe? Sff2ap10

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Help! Re: Tee Dee .049/.051 tuned pipe?

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