# Iller forwarder
**URL:** http://forum.driveonwood.com/t/iller-forwarder/6154
**Category:** Projects
**Created:** [November 22, 2021, 11:34am UTC](http://forum.driveonwood.com/t/iller-forwarder/6154 "2021-11-22T11:34:59Z")
**Posts on this page:** 20
**Page:** 5
### Author:  [@JO\_Olsson](http://forum.driveonwood.com/u/JO_Olsson)
#### Post date: [November 15, 2022, 3:45pm UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/81 "2022-11-15T15:45:04Z")
> [@Jan](#):
>
> but drove the last load on petrol then.
Another possibility - depends on what type of woodgas shut-off valve you’re using?
If that valve leaks through just a little, the gasifier could have been slowly smoldering - producing tary gas while you where running gasoline???
---
### Author:  [@Jan](http://forum.driveonwood.com/u/Jan)
#### Post date: [November 15, 2022, 3:52pm UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/82 "2022-11-15T15:52:32Z")
I think the valve is quite tight, the throttle is for a v50.
It worked fine the day after I ran the last load on petrol.
It was after I drove with the bubble can as it was tar the next day.
Can you turn your burner upside down and have a nice flame? (like a welding flame)
---
### Author:  [@JO\_Olsson](http://forum.driveonwood.com/u/JO_Olsson)
#### Post date: [November 15, 2022, 4:06pm UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/83 "2022-11-15T16:06:23Z")
I used to be able to do that, but the torch quit on me (plastic junk). I use an old brass valve with no nozzle now. I let a rich yellow flame get sucked down into the charbed at lightup.
---
### Author:  [@Jan](http://forum.driveonwood.com/u/Jan)
#### Post date: [November 15, 2022, 4:10pm UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/84 "2022-11-15T16:10:42Z")
Ok, I thought it would be possible to reverse this one, but there is a yellow flame on this one.
> **[Mixgasbrännare | Cyklonbrännartyp | RIMAC | Jula](https://www.jula.se/catalog/verktyg-och-maskiner/svets-och-lod/lod/gasdrivna-lodverktyg/mixgasbrannare-218540/)**
>
> För allt från grilltändning och köksbestyr till lödning/lossning av kopparrör/bultar/muttrar! Cyklonbrännarmunstycket har utrustats med pistolgrepp, piezotändning och justerbar låga. Gas ingår.
---
### Author:  [@JO\_Olsson](http://forum.driveonwood.com/u/JO_Olsson)
#### Post date: [November 15, 2022, 4:13pm UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/85 "2022-11-15T16:13:47Z")
Yeah, some cans don’t like being upside down.
---
### Author:  [@Jan](http://forum.driveonwood.com/u/Jan)
#### Post date: [November 15, 2022, 7:22pm UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/86 "2022-11-15T19:22:12Z")
From what I understand from what is written, the restriction is the main cause of tar in the engine?
---
### Author:  [@Woodrunner](http://forum.driveonwood.com/u/Woodrunner)
#### Post date: [November 15, 2022, 7:52pm UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/87 "2022-11-15T19:52:15Z")
Even the charbed has much to do with the tars, even a perfectly pre-filled hearth with good charcoal needs a lot of time settling, get a good mix by small and bigger pieces of charcoal.
Could it be it keeps smoldering some time after shut-down, when next start-up wood chunks pass way down the nozzles?
(Happened to me sometimes with the Volvo)
How is gas looking when start up, and even if you run the blower some after shut-down? Yellowish traces/smoke?
And also what JO says, old tar in piping/filter?
---
### Author:  [@Tone](http://forum.driveonwood.com/u/Tone)
#### Post date: [November 15, 2022, 7:54pm UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/88 "2022-11-15T19:54:10Z")
Jan, a tractor or work machine behaves much differently than a car on the road, so the tractor operates a lot with little load, then suddenly it needs a lot of power, but if we look at what happens in the gasifier, a small intake of gas causes the hot zone to cool down, and then suddenly increased consumption, which creates a negative pressure and tar gases and water vapor, which are located in the upper part, make their way through the already partially cooled coal. Would a smaller restriction opening prevent the passage of tar gases? I don’t think so, I have an advantage on my diesel tractor, because at low load I can throttle the air flow and thus increase the amount of gas, otherwise some of the pin is lost unused, but the gasifier remains hot and I haven’t detected tar in the pipeline yet, I also think that a large filter made of hay and sawdust packed tightly, catches a lot of tar.
---
### Author:  [@KristijanL](http://forum.driveonwood.com/u/KristijanL)
#### Post date: [November 16, 2022, 5:46am UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/89 "2022-11-16T05:46:29Z")
A tighter restriction can help, but like Tone sayd, its not a guarantee.
In my experiances, l got most of my tar from bridging. When a bridge forms, there is no longer a supply of wood and the gasifier uses up its charcoal. Sometimes down to ths restriction. Then the bridge collapses and there is no way to burn the tars anymore untill the charbed is astablished
---
### Author:  [@Jan](http://forum.driveonwood.com/u/Jan)
#### Post date: [November 16, 2022, 12:33pm UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/90 "2022-11-16T12:33:21Z")
I cleaned down to restriction today, it looks like it has been very hot just above restriction, very gray ash in the middle.
I haven’t seen anything like that on the Cheva.
This also has a high temperature at the top of the hopper, around 80-90 degrees C.
---
### Author:  [@JO\_Olsson](http://forum.driveonwood.com/u/JO_Olsson)
#### Post date: [November 16, 2022, 1:41pm UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/91 "2022-11-16T13:41:14Z")
I wouldn’'t worry too much about the hopper temp. It will lower as soon as the funnel fingers tar/seal up and slow down the hopper’s internal circulation.
> [@Jan](#):
>
> very gray ash in the middle.
I think that would happen to any gasifier after shutdown if a little oxygen was present.
What’s the distance between nozzles and restriction? Looks a lot shallower than I imagined, looking at your building pics. I was under the impression you were running pretty much WK-depth.
---
### Author:  [@Jan](http://forum.driveonwood.com/u/Jan)
#### Post date: [November 16, 2022, 2:47pm UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/92 "2022-11-16T14:47:36Z")
It’s about 16cm, measured today.
---
### Author:  [@SteveUnruh](http://forum.driveonwood.com/u/SteveUnruh)
#### Post date: [November 17, 2022, 11:18am UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/93 "2022-11-17T11:18:14Z")
Good Morning Jan A.
Up on post #79 you said something very meaningful,
“Yes, the problem is that I am standing in the middle of a forest.”
You were relating your frustration of being surrounded by wood but with none gasifer useable for you.
I do not know if you have any interest or experiences with the salty Seas and Oceans. It is the same. Surrounded by water but none fit to drink to maintain your life. I have life-long read in-the-ocean survival experiences stories. Those who could convert or capture a just a little bit, useable, survived.
The same here in our mountains (or yours along the Norwegian border). Surrounded by woods - over half of the year too wet to be able to use to easily life-preserving warm with.
Yet . . . those who can make-it-work have indeed survived. Having large wax candles pocketed is the trick here. The one rare waterproofed match lights the candle. The candle provided the continuous heating to dry the fire starter tinder. The next year done better. Even thrived, thereafter. No more one-use matches:
> **[English Flint and Steel Fire Striker Kit Traditional Hand - Etsy](https://www.etsy.com/listing/1114772676/english-flint-and-steel-fire-striker-kit)**
>
> This Camping item by RayNorthOutdoors has 115 favorites from Etsy shoppers. Ships from United Kingdom. Listed on Nov 15, 2022
Has the needed cotton char-cloth too.
My point is your Iller has the ability to pre-dry condition at least some of it’s it’s own fuel wood if you shift designing to make it so.
“Let no Calorie Escape un-Worked!” becomes a make-work mantra to achieve this.
Regards
---
### Author:  [@tcholton717](http://forum.driveonwood.com/u/tcholton717)
#### Post date: [November 17, 2022, 1:21pm UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/94 "2022-11-17T13:21:12Z")
Is this not the essence of being a prepper? If I were fortunate enough to have Jan’s Iller I would always have a bag of Bobmac rocket fuel in reserve and a design that would allow me to dry more fuel with the heat from that bag and on and on. Who would go out in the woods to cut firewood with only one saw or at least a way to free it when the bar get pinched? There is always something out there waiting to bite you in the ass. Always try and anticipate what it could be and KISS it.
[ ](https://www.youtube.com/watch?v=eXXKkKMf6eQ)
---
### Author:  [@Jan](http://forum.driveonwood.com/u/Jan)
#### Post date: [November 17, 2022, 3:00pm UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/95 "2022-11-17T15:00:38Z")
It wasn’t the wood I was thinking about in the middle of the forest, it was that I didn’t have enough electricity for a bigger spot, as Cody suggested.
I have firewood for Illern at home, but I didn’t take more than 2 sacks out to the forest, and Illern ate a little more before I had finished driving.
---
### Author:  [@Jan](http://forum.driveonwood.com/u/Jan)
#### Post date: [November 17, 2022, 3:13pm UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/96 "2022-11-17T15:13:17Z")
Don’t know if I showed these, but it was before the Illern broke again.
https://www.youtube.com/embed/prpLfBN4i5A?feature=oembed&wmode=opaque&start=47
https://www.youtube.com/embed/64Dw3YwfKFU?feature=oembed&wmode=opaque&start=1
---
### Author:  [@KristijanL](http://forum.driveonwood.com/u/KristijanL)
#### Post date: [November 18, 2022, 6:17am UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/97 "2022-11-18T06:17:52Z")
Your pictures of the hearth showed a familiar sight. I have seen this often, more often in charcoal gasifiers. Ash pugged charbed. When a litle ash starts acumulating, it gets to this point quite fast. And at this point you basicly dont even have a charbed anymore, whatever gasification happens happens above this ash plugged charbed.
I have since learned the importance of slipping char. The charcoal must be moveing down and away slowly to poop out any ash pockets.
---
### Author:  [@Jan](http://forum.driveonwood.com/u/Jan)
#### Post date: [November 18, 2022, 6:31am UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/98 "2022-11-18T06:31:28Z")
ok, so I have too far between the nozzles and restriction, or what is wrong?
---
### Author:  [@KristijanL](http://forum.driveonwood.com/u/KristijanL)
#### Post date: [November 18, 2022, 6:34am UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/99 "2022-11-18T06:34:09Z")
I dont think that shuld be a problem. Most gasifiers still work ok even if they are on the big side.
Whats your grate like?
---
### Author:  [@Jan](http://forum.driveonwood.com/u/Jan)
#### Post date: [November 18, 2022, 7:36am UTC](http://forum.driveonwood.com/t/iller-forwarder/6154/100 "2022-11-18T07:36:30Z")
I’ve made it somewhat similar to Ben’s, grate.
[Previous page](http://forum.driveonwood.com/t/iller-forwarder/6154.md?page=4)
[Next page](http://forum.driveonwood.com/t/iller-forwarder/6154.md?page=6)