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Wingtip smoke - 4/21/2002 3:15:22 PM   
Biplane-RCU


 

Posts: 24
Joined: 2/19/2002
From: Houston, TX
Status: offline 		Several years ago I read an article regarding the installation of wingtip smoke. Anyone have a better memory and can point me to the magazine or article?

Anyone have any experience or ideas?

Bulding an upsized CG Ultimate (65" wing) and now is the perfect time to install.

Thanks

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       Post #: 1

Wingtip smoke - 4/21/2002 10:23:36 PM   
MHawker



Posts: 2581
Joined: 3/1/2002
From: San Diego, CA, USA
Status: offline 		That sounds cool. Let us know if you find out how to do it.

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Mike

Anyone know any good blonde jokes? I'll start- "There was this blonde customer service rep..... "

(in reply to Biplane-RCU)
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Wingtip smoke - 4/22/2002 5:48:01 AM   
geardaddy


 

Posts: 426
Joined: 1/20/2002
From: Bloomington , USA
Status: offline 		I recall an article in RCM with a 1/3 laser or similar with copper tubes in the wing to route exh/smoke out there. Looked like a lot of stuff.

(in reply to Biplane-RCU)
       Post #: 3

Wingtip smoke - 4/22/2002 6:01:26 AM   
Biplane-RCU


 

Posts: 24
Joined: 2/19/2002
From: Houston, TX
Status: offline 		Thanks for the heads up on the RCM article. Do you have any idea how far back?? I do remember a friend sending me a copy of an article approx. 5 - 6 years ago, cannot remember where it came from. That's old age for ya.

Thanks again I'll search their site.

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Build straight, fly fast, crash with pride

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       Post #: 4

Wingtip smoke - 4/22/2002 7:54:26 AM   
Emissions


 

Posts: 108
Joined: 12/25/2001
From: Illinois
Status: offline 		in model aviation a guy built a 1/2 scale formula 1 racer. He used a small diameter metal tube in the LE to get the smoke to the wing tips. I thought there was more in the article but it just mentions the tubes.


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FREEDOM ISNT FREE!

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Wingtip smoke - 4/22/2002 8:35:42 AM   
gelcoat-RCU


 

Posts: 52
Joined: 1/6/2002
From: Ste Julie, QC, CANADA
Status: offline 		Biplane et al,
An article written by Dan Santich on this subject appeared in the Octobrer '85 issue of Model Airplane News concerning this topic. Dan, later on, (unfortunately I do not have the date) again wrote in MAN on this subject piping a BIG HOTS for tip smoke. He used brass tubing and high temperature nylon fittings for the job. MAN can probably dig out the article upon request
John (MAAC - 13304L)

(in reply to Biplane-RCU)
       Post #: 6

FYI - 4/22/2002 8:11:34 PM   
wbrian



Posts: 125
Joined: 2/9/2002
From: Satellite Beach, FL, USA
Status: offline 		found this on google-- hope it helps

So, a small thread going here previously about whether or not you can get
smoke out of a tuned pipe. Despite the naysayers - YOU CAN! Here's my
setup:

A Supertiger .61 with ST Tuned pipe, 12x6 prop (this is not a long stroke
engine!), 10% fuel. Pressure tap on the crankcase, with a check valve,
going to the smoke tank. Du-Bro shutoff valve. 18" of brass tubing
wrapped around the cylinder head (not obstructing any cooling fins), and
then another 36" of tubing wrapped around the exhaust header, as close to
the exhaust port as possible. The header tubing has been wrapped with
flame resistant cloth, which is originally from a pad sold in hardware
stores to protect areas from torch burns while soldering water pipe. The
insulation is used to keep heat in, and wind chill off. The smoke tap is
about 1" from the exhaust port. My ST header had cooling fins on it, which
I ground off to make room for the tubing. Smoke trail is not as fantastic
as that previously produced using my YS 120, but is still very acceptable.
Clearly visible, good hang time, produces enough that I can pull VERY large
loops and complete the smoke circle. Residual heat is good for smoke
throughout a stall turn, if I keep the power off for a minimum of time. No
flameouts at idle. I do loose a few hundred rpm with smoke on. Unsure
whether this is due to the change in crankcase pressure, or blow back of
fluid into the cylinder. 1 gal. of Bennet's Best smoke oil use, no sign of
problems when I pulled the head to check. No, I wouldn't use this system
on a YS or any engine with silicon parts, but I have no reason to believe
it wouldn't work on most other 61 piped installations. Consumption is 16
oz. in about 10 min.
--
Ted Sander
University of Minn.
**sande005@tc.umn.edu**

(in reply to Biplane-RCU)
       Post #: 7

Wingtip smoke - 4/22/2002 9:58:08 PM   
gelcoat-RCU


 

Posts: 52
Joined: 1/6/2002
From: Ste Julie, QC, CANADA
Status: offline 		Hi Biplane,

A thought crossed my mind just minutes ago. (Not often but I get one of those every other fix.)
Question the net on "SMOKE" for R/C planes of Radio control planes and tons of accessible sites will show up just about all with information regarding smoke. It may not provide infor on your specific need but will provide you with everything else.
Good lick
Jean

(in reply to Biplane-RCU)
       Post #: 8

Wingtip smoke - 4/22/2002 10:14:33 PM   
gpmikemorse-RCU


 

Posts: 142
Joined: 1/2/2002
From: Garrett Park, MD USA
Status: offline 		My flying buddy has a plane with wing tip smoke. When he was building the wing, he put in flexible electrical conduit (it looks a little like BX cable). It's a pretty big plane, so the weight was not a big issue. He jerry rigged a connection to the exhaust of the Quadra 40 (called something else now) using high temp silicone tubing. It works great. If you have any questions, let me know.

(in reply to Biplane-RCU)
       Post #: 9

Wingtip smoke - 4/23/2002 6:13:52 AM   
Biplane-RCU


 

Posts: 24
Joined: 2/19/2002
From: Houston, TX
Status: offline 		"OK", here's the plan so far. I found out that my employer sells a nylon tubing in sizes 1/4>1/2" ID with fittings. It is rated up to about 60 psi and is made to carry hydraulic oil, temp rating over 250 degrees for sure.

The plane is set up with a Webre 120 and tuned pipe inside the fuse.

If I follow wbrain's post I can easily get smoke to the wingtips. Unique, but would it become boring?

I can do both by using the new smoke nozzle injector and wrap the pipe, add one valve and wingtip is on and off.

Might be adding to much weight. Will have to weigh the finished pieces and do some calculations.

I know the CG Ultimate ARF flys really well on an OS 1.08. that's been my biplane trainer. That plane weighs 9.5 lbs. The smoke system added 1 lb. (total 10.5 lbs.) with it's own battery. You can mount two 16 oz tanks side by side on the CG in the stock Ultimate fuse. With the tuned pipe in the fuse have not yet determined tank arrangement.

This board is great, the people here are very helpful. Thanks

_____________________________

Build straight, fly fast, crash with pride

(in reply to Biplane-RCU)
       Post #: 10

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