HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Aug 15, 2011, 10:47 AM
Registered User
Sudbury ON Canada
Joined Nov 2009
120 Posts
Discussion
Boosting a stock H.L. smoke unit

Until now , one of the way to boost the smoke output of a H.L. smoke unit was to replace the pumping system by a mini fan ....Even if it meant loosing the pulsating effect provided by the original system ....

Then It occurred to me : Why not simply add a mini fan on the top of the air cylinder to boost the output and restore a positive pressure inside the cylinder on the back stroke of the piston ....


The modification is quite simple and the results are stunning ....

In the following video , I am running 2 brand new smoke units together to show the difference ...

-The nichrome heater elements of both smokers have been measured at 15.5 Ohms .
-Both units are connected to the same power supply and the same RX-14 board ...
-Both units have been drained and refilled to the same level .

So the only variable in this video is the addition of the mini fan on one of the smokers ...

Boosting a stock H L smoke unit (2 min 30 sec)
strmnd54 is online now Find More Posts by strmnd54
Reply With Quote
Sign up now
to remove ads between posts
Old Aug 15, 2011, 11:05 AM
Registered User
Blitzkrieg65's Avatar
Escondido, California
Joined Apr 2007
925 Posts
Very Good, but still very noisey that is one reason why the guys wanted to change over to the fan, but I like the idea. So can you just change the nichrome wire with a 1/4 watt 15 ohm resistor and get a more reliable unit as well?


Thanks for showing your testing,

The Blitz
Blitzkrieg65 is offline Find More Posts by Blitzkrieg65
Reply With Quote
Old Aug 15, 2011, 11:19 AM
Registered User
Sudbury ON Canada
Joined Nov 2009
120 Posts
Yes , for sure ...I intend to replace the nichrome wire by a 1 Watt 14 Ohms Wire wound resistor , with a kevlar wick ; and even use my refilling ( low level ) probe in it ...
I figure that this mod. is an easy and cheap way to keep the pulsating effect of the original design as some guys wanted it .... ....
strmnd54 is online now Find More Posts by strmnd54
Reply With Quote
Old Aug 15, 2011, 12:37 PM
Registered User
Blitzkrieg65's Avatar
Escondido, California
Joined Apr 2007
925 Posts
Quote:
Originally Posted by strmnd54 View Post
Yes , for sure ...I intend to replace the nichrome wire by a 1 Watt 14 Ohms Wire wound resistor , with a kevlar wick ; and even use my refilling ( low level ) probe in it ...
I figure that this mod. is an easy and cheap way to keep the pulsating effect of the original design as some guys wanted it .... ....

Right on, great work and keep those ideas coming!

The Blitz
Blitzkrieg65 is offline Find More Posts by Blitzkrieg65
Reply With Quote
Old Aug 15, 2011, 03:27 PM
Registered User
Sudbury ON Canada
Joined Nov 2009
120 Posts
In the previous video , the noise level was high because the 2 units were running at the same time ...

In the next video , I keep switching between the 2 units ...

At first glance , the modified unit seems to be running smoother and quieter than the stock one ....

Boosted H L smoker 2 (2 min 36 sec)
strmnd54 is online now Find More Posts by strmnd54
Reply With Quote
Old Aug 19, 2011, 09:15 AM
Registered User
Sudbury ON Canada
Joined Nov 2009
120 Posts
I proceeded with the full mod. of the smoke unit ..
Here's a short video and some pictures ...
Notice in the video the ease of maintenance provided by the refill probe : When smoke is coming out of the probe , there is around 1/16 " of fluid left in the unit ; just add a full Syringe to refill ...
This way you don't need to worry about running dry or overfill ...

Boosting a H L smoker full mod (1 min 18 sec)
strmnd54 is online now Find More Posts by strmnd54
Reply With Quote
Old Aug 24, 2011, 12:16 AM
Registered User
scrooem's Avatar
Joined May 2011
32 Posts
great info!

Quote:
Originally Posted by strmnd54 View Post
I proceeded with the full mod. of the smoke unit ..
Here's a short video and some pictures ...
Notice in the video the ease of maintenance provided by the refill probe : When smoke is coming out of the probe , there is around 1/16 " of fluid left in the unit ; just add a full Syringe to refill ...
This way you don't need to worry about running dry or overfill ...

http://youtu.be/0Uo89du7FoE
i have 2 hl's and the tiger's smoker is not functioning at the moment...
when i figure out which screws to pull to separate the hull from the bottom i will think this mod through...

i am guessing the 15. om is the heat generator that replaces the original wire, therefore the connecting wires are already in place to reattach... correct?
scrooem is offline Find More Posts by scrooem
Reply With Quote
Old Aug 27, 2011, 03:06 PM
Registered User
Joined Aug 2011
2 Posts
Quote:
Originally Posted by strmnd54 View Post
Notice in the video the ease of maintenance provided by the refill probe : When smoke is coming out of the probe , there is around 1/16 " of fluid left in the unit ; just add a full Syringe to refill ...
This way you don't need to worry about running dry or overfill ...
And how do you know that the tank is empty? Over what period of time the tank is empty? Can I make a tank of Plexiglas that you can see the oil consumption? What brand Kevlar yarn did you use? Can you give a link where to buy Kevlar thread? I know that Kevlar yarn sold in stores for the fishermen. Kevlar yarn like no white.
Gora77 is offline Find More Posts by Gora77
Reply With Quote
Old Aug 27, 2011, 07:22 PM
Registered User
Sudbury ON Canada
Joined Nov 2009
120 Posts
Quote:
Originally Posted by Gora77 View Post
And how do you know that the tank is empty? Over what period of time the tank is empty? Can I make a tank of Plexiglas that you can see the oil consumption? What brand Kevlar yarn did you use? Can you give a link where to buy Kevlar thread? I know that Kevlar yarn sold in stores for the fishermen. Kevlar yarn like no white.
You know the tank is empty when you see the smoke coming out of the refill probe ( like on this video where the refill probe is over the rear of the right track
low on fuel (1 min 0 sec)


The smoke unit runs for around 55 minutes between refilling ....
As for the kevlar wick , here's a link where I buy it ; and a picture of the wick itself ....http://cgi.ebay.ca/Kevlar-Wick-50mm-fir ... tem2a11924
strmnd54 is online now Find More Posts by strmnd54
Reply With Quote
Old Aug 29, 2011, 12:16 PM
Registered User
Sudbury ON Canada
Joined Nov 2009
120 Posts
I was asked a week ago by someone who is in the trucking and excavators hobby to suggest a smoke unit for his models ...I tough about the boosted H.L. unit and wondered how it would perform with longer exhaust pipes in a vertical position
Since there wasn't many ways to answer that ; I came up with this video ...

Boosted H L extreme test (1 min 22 sec)
strmnd54 is online now Find More Posts by strmnd54
Reply With Quote
Old Aug 29, 2011, 01:00 PM
Registered User
Joined Aug 2011
2 Posts
Quote:
Originally Posted by strmnd54 View Post
I was asked a week ago by someone who is in the trucking and excavators hobby to suggest a smoke unit for his models ...I tough about the boosted H.L. unit and wondered how it would perform with longer exhaust pipes in a vertical position
Since I have a truck and pipe should be long, I went to the store and bought a set of spare parts hoses to the washer for VAZ cars. Costs 30 rubles, or one dollar. Hose length about five feet. Ideal for tank Heng Long smoke generator.

My question is, why, and the piston and the fan? It seems like one fan is better?
Gora77 is offline Find More Posts by Gora77
Reply With Quote
Old Aug 29, 2011, 01:32 PM
Registered User
Sudbury ON Canada
Joined Nov 2009
120 Posts
Using a fan only will produce a continuous exhaust smoke that looks more like a jet engine exhaust than a piston engine ....
strmnd54 is online now Find More Posts by strmnd54
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold Jpower 50mm AMX and F22, wemo fan and stock fan unit The Don Aircraft - Electric - Jets (FS/W) 4 Aug 03, 2011 12:19 PM
Sold Jpower stock 50mm edf unit RC_Bob Aircraft - Electric - Jets (FS/W) 1 Jul 10, 2011 05:57 PM
Sold Jpower stock 50mm edf unit RC_Bob Aircraft - Electric - Jets (FS/W) 2 Jul 05, 2011 11:09 AM
Discussion Recycling broken H.L. smoke units strmnd54 RC Tanks 10 Mar 13, 2010 11:01 AM
For Sale 64 Mm Ducted Fan Unit- H.l Mirage Parts Lot crashEMhard Aircraft - Electric - Jets (FS/W) 2 Sep 25, 2007 06:55 PM