Brisbane control line club

[danny_galaga]

Just ribbing ya, Nev 😊

[facthunter]

That OHLSSEN is Actually a Brown Junior. The first model engine to be mass produced in the USA. About 50,000 were produced between 1935 and 1941. Nev

[danny_galaga]

5 hours ago, facthunter said:

That OHLSSEN is Actually a Brown Junior. The first model engine to be mass produced in the USA. About 50,000 were produced between 1935 and 1941. Nev

Well spotted! I was googling for ohlssen with the ignition set up to emphasise it's 'olden dayness ' 😄

 

No idea why that came up instead 🤔

[danny_galaga]

So, continuing with scratch building stuff I could just buy, heres the other end of that clip. Made from some pen barrels, K & S tubing and a small bullet head nail. I don't want lots of paraphernalia or a giant flight box, so this keeps things about as simple as can be. The glow driver is USB charged and fits almost everything else. Now I can use it on Cox ☺️

[facthunter]

Whip the leads off as soon as the engine starts to save the Glow Plugs.. The blog I mentioned is Adrians Model aero engines. It's well laid out. I only have about 8 engines remaining of My collection having been persuaded to Part with the others by serious collectors who I trust to care for them..  Nev

[danny_galaga]

7 hours ago, facthunter said:

Whip the leads off as soon as the engine starts to save the Glow Plugs.. The blog I mentioned is Adrians Model aero engines. It's well laid out. I only have about 8 engines remaining of My collection having been persuaded to Part with the others by serious collectors who I trust to care for them..  Nev

While it's been a while, it's not my first rodeo ☺️

 

Once started, the glow plug still glows, so I'm not sure how much life I'm saving. But it's prudent to be fairly quick to not flatten the battery. This was super important as a kid when I only had those huge 1.5v alkaline batteries. 

[facthunter]

IF you get the revs up the Plug element gets heat from the combustion plus the Battery and that's not good for the engine OR the Glow Plug. I always used ONE cell of an old 6v Lead Acid Battery which is 2.2 Volts Cut the Hard Rubber case. Money was short. Nev

[danny_galaga]

4 hours ago, facthunter said:

IF you get the revs up the Plug element gets heat from the combustion plus the Battery and that's not good for the engine OR the Glow Plug. I always used ONE cell of an old 6v Lead Acid Battery which is 2.2 Volts Cut the Hard Rubber case. Money was short. Nev

One cell is just a smidge over 2V. 2.2V will actually do in the plug faster than leaving my 1.2V connected.

[facthunter]

I used Much longer Leads than you Might have, and also got the leads off fast. I wasn't hard on glow plugs. No way could I afford those Large 1.5 V carbon zinc batteries that can't be recharged. 

[facthunter]

The Title of the Blog I recommended is "Adrian's Model  Aero Engines" .  Nev

[danny_galaga]

Well, I took the lil model to the club today. It wasn't playing the game. The guys recommended 3 to 3 1/2 turns on the needle valve. I ended up flattening my battery and getting way more raps on the knuckles than I do without a spring start 😄 

 

Went home and pulled the attached fuel tank apart because we all suspected something was not quite right. Crimped fuel pick up or missing reed valve etc. Sure enough the fuel pick up end was kinda squashed. I fixed it up and started it up at home. Running at 1 1/2 turns! A couple more tanks will see it settle in.

 

 

[facthunter]

Can't you put the spring back on? Fuel hose for a chainsaw may be better  with sharp bends. The type used inside the tank. Nev

[danny_galaga]

1 hour ago, facthunter said:

Can't you put the spring back on? Fuel hose for a chainsaw may be better  with sharp bends. The type used inside the tank. Nev

What I mean is, compared to my rotary valve 049 on the other plane, this one, with its ostensibly safer spring start has caused me more injuries 😄

049 fuel hose is way smaller diameter than chainsaw hose. As you can see, it's running now 🙂 

[ClintonB]

You never forget that sound, even on the iPad speaker. 

[facthunter]

There's different sizes of chainsaw fuel line.  The stuff used inside the tank will NOT Kink. It's  a Klunk tank. Bending every time you change position. Like some Medicinal stuff to look at. Honey coloured.  Nev

Edited Friday at 07:46 AM by facthunter

[danny_galaga]

2 hours ago, facthunter said:

There's different sizes of chainsaw fuel line.  The stuff used inside the tank will NOT Kink. It's  a Klunk tank. Bending every time you change position. Like some Medicinal stuff to look at. Honey coloured.  Nev

The fuel hose has a roughly 2mm ID. I can't imagine any 20+ cc engine running on that size hose. Besides, there's no need to screw around with incorrect stuff when there's stuff available for model engines. 

049 fuel tank is just not a great design. If the fuel hose is a tad long, the end gets blocked like mine did. It actually has a tiny spring inside to help stop it kinking. If the hose is a tad short you're seriously reducing your run time.

[facthunter]

It's NOT INCORRECT stuff IF it works better. Some of the fuel line I've purchased from normal outlets is rubbish.  IF you are competing it could jeopardise all your effort.  Nev

[danny_galaga]

5 hours ago, facthunter said:

It's NOT INCORRECT stuff IF it works better. Some of the fuel line I've purchased from normal outlets is rubbish.  IF you are competing it could jeopardise all your effort.  Nev

Radial mount Cox 049s have a fuel tank attached to the back of the engine, from the factory. I'm pretty confident they are using the correct stuff ☺️. The only problem is variation in length, sometimes the end gets squashed 

Edited Saturday at 06:30 AM by danny_galaga

[facthunter]

I'm Not talking JUST about Cox's. That spring would alter flow a Lot.. Nice Pics by the way. Nev

[danny_galaga]

14 minutes ago, facthunter said:

I'm Not talking JUST about Cox's. That spring would alter flow a Lot.. Nice Pics by the way. Nev

It's designed around that spring. So much so that there's anecdotes that taking the spring out makes it run rougher! A Cox engine compared to any other engine we are familiar with is like quantum mechanics compared to Newtonian physics- you just have to accept it works, without fully understanding why 😄

 

Pic is from the net BTW. However, THIS pic is mine. If I'm having trouble with an 049 (0.75cc) imagine what it'd be like running this 010 😲 . But then again, strangely enough, at this size they go back to rotary valve, notice the venturi and external fuel hose. It would probably be easier to start ☺️

 

I will never run it through. It's worth more as a collectors item in its box.

[facthunter]

Is that a Glo Head? I have a Merlin I've never run. Nev

[danny_galaga]

23 minutes ago, facthunter said:

Is that a Glo Head? I have a Merlin I've never run. Nev

Yes, Cox have the glow plug built into the head. There is a diesel conversion for 049 but it's not very good. In the case of the 010 (0.15cc!) a regular glow plug would be nearly as big as the piston 😄

[Marty_d]

2 hours ago, facthunter said:

 I have a Merlin I've never run. Nev

27L V12 Nev? Let's build a Spitfire!

[facthunter]

 Nah A Ratbike. It's an Albon Merlin. Tiny diesel in my Model motor collection.  I'll BET someone has a Pic of one. Nev

[onetrack]

An Albon Merlin diesel...