Quietstove silent cap on Radius 42

Here I am setting up for lunch in the garden:



My much loved and extremely practical Radius 42 kit.



It now sports a Quietstove 123 silent cap.



It is a very solid-feeling item and drops straight into the burner without fuss.



It does make the burner a little taller but not much, you can see I have plenty of clearance here.



Flame! Lighting was no problem. I used meths to preheat, let that burn out then opened the valve and applied a second match to that. Due to a stiff breeze the preheat was not hot enough and there was some spitting, but with the valve turned low this soon cleared up. The flare-ups from liquid fuel were much less dramatic than with the roarer plate. The flame holes are almost all below the top rim of the burner bell so there is plenty of thermal feedback.



I then got down to the serious business of making lunch. The wind in the trees was louder than the stove once it had the kettle on. It boiled and fried perfectly , resisting the gusts well thanks to the protection of the No 7 case.

When I had finished I shot this short video clip:

[media=youtube]BI-DWCxO1eg[/media]

This makes it seem louder than it really is. It is extremely quiet, certainly usable first thing in the morning without disturbing the peace.

I am very pleased with it

 

Very well written recap.

Quietstove contributes one very important thing to the viewers of the forum “choice”. As you say, having used both products, Quitestove has a good StoveCap that works as advertised and for people that can’t or don’t want to afford Gary’s product, they now have an option.

To those that seem intent on bashing Quitestove-Gary’s obviously a smart, gifted product developer…he’ll come up with better stove caps (perhaps that heats more quickly) or other ways to improve stove performance (like holding cook gear in a more stable position). He may also improve/refine his manufacturing techniques to lower his costs. The fact is, his best option for the future is to compete with Quitestove is to create new innovative products that are better/offer better value. He will!

To attempt to sink an competitor by character assassination or bad publicity insults Gary and his talents. He’s better, your better! Take the high road.

 

Nice custom mix n match outfit David

 

Sure looks pretty alright.

Did you pay full retail ($119) for that Quietstove cap or is it one of the freebies that are shipped out for evaluative purposes?

Cheers,
Gary

 

a useful report with some great pics. thanks

 

I say, that's a great cap and a spiffing report of your fry-up and brew time on the back porch of Chez Colter, old bean.

Jolly good show.

Those Yank Quietstove converter cap manufacturing fellows are dashed clever chappies and thoroughly good eggs.

Ta-ta for now.

 

wheres the rest of this post gone??

 

https://classiccampstoves.com/threads/22906

https://classiccampstoves.com/threads/22905

 

I totally give up

 

Hi David

Does it simmer well? Better or worse than the original flame plate?

 

Nice avatar, Ross! - IMO, much better than your old one. 8)

...and how appropriate, methinks...

 

Mikko,

I have run the Radius 42 again and tried simmering. I discovered that at the lowest output there was a tendency to make a big crown of sooty yellow flames underneath the pan. This went away as soon as I took the pan off and came back when the pan was on again. This was not liquid fuel, there was no spitting from the jet.

One time with these flames under the pan, the cap went into underburn so I shut off and relit.

At about half power the flame was clear and stable and I cooked on this for ten minutes or so.

I left it running at its lowest possible output without the pan on for five minutes, this went without a problem. The tank was still hot at the end of this period.

I suspect that the low flame speed was allowing hot gasses to recirculate down below the burner and get drawn into the burner bell a second time, starving the flame of oxygen. It was probably one of the big sooty flames that recirculated and ignited the underburn.

So, the cap will certainly support simmering but the setup of your stove case / windshield etc may limit how low you can run it with a pan on.

 

Too bad David.

Ealing comedy film of the 50's you'll most probably have seen, 'Man in the White Suit'. Alec Guiness as a boffin, invented a yarn that was indestructible and repelled dirt.

Alas, he'd overlooked one thing during development. First shower of rain on his suit made from fabric woven from the yarn and it disintegrated on contact with water.

Burner cap that won't simmer?

John

 

How do you get

From

 

Hi, David,

Actually, I was a tad confused on that issue, too, as I was thinking that, if the cap did not simmer on every stove on which you tried it, then it did not simmer across the board, which to me is a problem. So, I can see how Presscall took your comments in a different manner, as did I. Thanks for clearing that up. Take care, and God Bless!

Every Good Wish,
Doc

 

The problem, as I diagnose it, is that the case is not designed for a silent burner. There is a prominent raised lip at the top edge of the case which impedes outward flowing hot gasses underneath the pan.

With a roarer burner the flame speed is always high enough and angled outward enough to prevent these pooled gasses from sneaking down past the burner.

With a silent burner there is not enough flame speed to prevent this if the flame is turned right down.

I can test this tomorrow by running the stove without the case and holding the pan over it.

 

There's surely nothing paradoxical about my statement in saying that a burner that won't simmer reliably with a pan on board even though it will without the pan 'won't simmer'. I'm talking 'real world' where pan+stove is key.

No.7 case that messes up combustion of a silent burner?

Well I've the very same combination of stove and case as you saw here ...

Radius 42 and No.7 case


... and a BD Minicap doesn't fail to simmer in that set-up, even with a pan on board.

 

How about a side-by-side test? I can pop over on the train if you have a free weekend?

 

Hi John. Interesting to see the link to your 42 in a No7 case. I was giving my 42 a quick shine last night and looked despairingly at it's case. It's the original case but is total rust inside and out with the Radius logo just visible if you use your imagination. The tin is rusted through in places. I've got a Governor Lamb in a No7 case so tried the 42 in it. Like you say a perfect fit.

I can see an order going off to the 'No7 man'. I think I might get 2 or 3 while I'm at it. His stock won't last forever!

Regards,
Terry

 

Yes Terry, those No.7 cases are pretty solid.

I like the fact that the pot rests are just four pieces of steel angle section pop-riveted in place. It means they're easily replaceable when heat and rust take their toll as they did on so many original cases for 71's and all the rest.

David Colter said,

Heck Dave, must we? Smacks of boy racers going head-to-head in souped-up Renaults.

Tell you what, let the pictures tell the story for now eh?

Radius 42, BernieDawg Minicap (No.81 in the production run) and army surplus No.7 case




BD Minicap in brass






Priming




Max




Sort of 'middle'




Min




The acid test, how's it do with a pot on board? (Answer: just as well as without a pot, perfect combustion from simmer to max and all points in-between)

Max




Min




I didn't bother keying-in 'mid-way' but you get the idea.

John