Nic

7 hours ago, Mikey98118 said:

Now you need to at least double the hight of your forge.

I won' be changing that forge but maybe in a bit make a bigger one

6 hours ago, ThomasPowers said:

No the sound is very distinctive.   In my NA burners I can often back out the choke and give a big puff of air and push the burn out the end of the tube.  With my blown burner I was always able to open the gate to the blower to accomplish that.

It didn't happen when inside the forge but rather happened in the vise outside the forge....

I can' say for sure.... the steel wool is out.. . The gas is coming In at the 90deg bend.... i sand papered the tube to make it shine again now the bottom of the burner tube when I took it out from about 10 mins of burning....was hot but not red hot... and the steel for about 2 inches had gone that hot blue colour .... once it twice while I was adjusting things I would hear like a thump     the flame would go out and then I'd hear a sort of hollow echoey sound. .. I'd swith off gas then switch on and light again.. .. is the only way to tell if it' burning in the tube is when the tube starts to glow?  

The steel wool was the 1st thing to go...i cleaned up the burner and gave it a try today.. .. the bottom of the burner tube heated up but not red.

The hair dryer is just a temporary thing... my actual blower I am collecting tommorrow.... it' is a jumping castle blower that I'll add a valve to to adjust the flow.... designer didn' specify the steel wool ... someone else suggested it....the designer specified a 150cfm blower....  but I think bottom line is ... it is to big for my forge.... which is fine as I am sure I'll be building another one at some stage...  I did however today made some changes to it so now it is to the exact specs the designer specified .... I took the flame holder / rings out today and it actually melted the back end of the pipes ... this is with the adjustments.... needle valve and changed the entry positin of the gas... Will test in tommorrow morning 

4 minutes ago, jeremy k said:

The size of your forge is nowhere near what the drawing is. It appears way to small for that size burner.

I sha'll keep it for the next forge then 

Attached is the plan I'm working too (now).... my question is it says a 2 inch coupling which I have then a 2 inch nipple.... is that the length of the nipple when it is screwed betweeb the coupler and the 90 set bend .... coz i have a 3 inch nipple but a two inch gap.... I haven't seen 2 inch nipples.... my other question is the position of the orifice matter to much as in how far into the burner should it go....  and should I knock the flame holder out and cut it shorter as @thomas powers 'mentioned

On 28/01/2018 at 12:41 AM, ThomasPowers said:

The flame holder rings in the one I built with Hans Peot looking over our shoulders were quite short.

Hello.... 

Attached is the plan I'm working too (now).... my question is it says a 2 inch coupling which I have then a 2 inch nipple.... is that the length of the nipple when it is screwed betweeb the coupler and the 90 set bend .... coz i have a 3 inch nipple but a two inch gap.... I haven't seen 2 inch nipples.... my other question is doesbthe position of the orifice matter to much as in how far into the burner it should go....  and should I knock the flame holder out and cut it shorter as @thomas powers 'mentioned

On 28/01/2018 at 12:41 AM, ThomasPowers said:

The flame holder rings in the one I built with Hans Peot looking over our shoulders were quite short.

Thank you

Sorry 

.... was tryin  to edit .... no.. can not.... but it is out now 

No

The plan  I have says 3 inch... Maybe I got confused as I work in millimetres... let me check 

Hi all..

I just made a two inch forced air burner.... I followed the plans of hans peot except  that my gas comes into the tube slightly different ...... I have a 1/16 inch orifice.. .. all the metal tubes are two inch... I have a hair dry as a temporary air supply that blows warm air... I have welded rings that are three inch long at end of burner tube that are I had stainless steel wool at the top of the tube to aid the air gas mix.... the chamber is and I'm South African so it' in millimetres... . 300mm x 100mm x 70mm which I think is 210 cubic centimetres..... I run it at between 1psi and 5 psi with the blower adusting airflow according to gas pressure..... I think possibly the stainless wool might've melted a bit and blocked a bit of the flame holder as it was roaring and then I heard a sound and then it sounded different and when I took the burner out it looked like bits had been welded to the end... I shall attach pics and videos .... let me know if you need more info.... oh and the back door was closed with a cm gap a long the top and front door has a mouse hole..... thanks guys

Hi Thomas... 

It is just the 1st time I have heard anyone say or talk about  a two inch pipe .... but yes.... when I started on this journey I didn't research anything and it cost me about two months and lots of cash and not working.... anyway it' finally working but I would like to try the forced air one for more control of air and gas mixtures.. .. unfortunatey here is South Africa not all the parts are available.... simple things like 1/8  brass nipple.... cannot find one anywhere..... black pipe.... nobody only galvanised pipe.. some places sell very few fittings and some sell no pipe but have fittings.. a needle valve or gate valve.... on order and waiting but not readily available ... So the reason why I ask these questions is because sometimes I just can't get what is in the design so I'm trying to figure out alternative. I think I will go with the hans peot design and yesterday was the 1st time I found a place that has a wide variety of galvanised pipes very far out of cape town .... I was like a kid in a candy store ... anyway.. . Thanks again... I will keep you all posted  

The blower i have has a 1 - 6 speed control already....it just gives a very high pitch sound...  So you reakon I should up my pipe size to 2 inch?

Hi.... sorry... i thought i had edited that... it is meant to be 100 cubic metres per hour   .. I read for a hans peot burner I need a blower that blows 150cubic feet per minute but that is with 2 inch black pipe... the blower I am using is just a blower i have aleady at my factory .... So isn't meant to be used permanently 

Hi.. not a compressor... a mactec dust blower... very noisy  .. could I use a fab with a 100squre meter per hour air flow

Hello.... I have a few questions... I'm in the process of making a forced air burner.... my question  is my gas comes in from the side at 90deg to the air pipe... I feel that it would be better if it came in from the same direction as the air does... I've attached a pic of my 1st attempt and then a pic of my next sort of plan..... someone said to me for forced air I should use 1 1/2 in piping for burner tube and air intake.... can anyone give some input... thanks

Nic