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Search: Posts Made By: downunder
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Forum: Glow Engines
11-02-2020, 04:06 PM
Replies: 5
Views: 617
Posted By downunder

The needle valve is just a standard OS needle...

The needle valve is just a standard OS needle valve much like they've been making for the last 50 odd years but they did tend to change the length of the needle. My son has one of those H-80's but on...
05-28-2020, 03:18 PM
Replies: 3
Views: 2,114
Posted By downunder

The neck on the carb is 9.4mm and extends ~11mm....

The neck on the carb is 9.4mm and extends ~11mm. The very early carbs were extremely crude (RC was just beginning back then) and simply used the CL spray bar through the barrel (I've got one of them...
Forum: Glow Engines
04-05-2020, 04:18 PM
Replies: 2,271
Views: 229,829
Posted By downunder

There's a test of a slightly earlier version of...

There's a test of a slightly earlier version of yours here (http://sceptreflight.com/Model%20Engine%20Tests/ST%20G21-29RV.html). The difference mainly being no muffler/pipe ears on the exhaust and a...
Forum: Glow Engines
02-25-2020, 03:26 PM
Replies: 5
Views: 841
Posted By downunder

You're in luck for this one because only two days...

You're in luck for this one because only two days ago someone kindly scanned it and sent the scan to me.
Irvine 53 (http://sceptreflight.com/Model%20Engine%20Tests/Irvine%2053.html)
Forum: Glow Engines
08-10-2019, 05:29 PM
Replies: 4
Views: 1,150
Posted By downunder

My very first engine back in the late '50's was a...

My very first engine back in the late '50's was a second hand ETA 29 which I used to learn to fly CL. I now have a Mk4 (from Ebay) that needed a new cylinder head (maybe from you Ray? I forget now)...
Forum: Glow Engines
02-14-2019, 03:07 PM
Replies: 10
Views: 632
Posted By downunder

According to this test ( ST S.75 (2)...

According to this test ( ST S.75 (2) (http://sceptreflight.com/Model%20Engine%20Tests/ST%20S.75%20%282%29.html) ) the S75 has no shims and a .005" squish clearance with a compression of 10.8:1...
Forum: Glow Engines
02-14-2019, 02:25 PM
Replies: 2
Views: 357
Posted By downunder

As 1Q said, normally it's to remove the wrist pin...

As 1Q said, normally it's to remove the wrist pin however I've never pulled mine apart to check this. I've got a G20/19 (1960) and a G20/15 (1965) both with that hole. The 19 has a baffled piston...
Forum: Glow Engines
12-27-2018, 12:49 PM
Replies: 39
Views: 10,171
Posted By downunder

You can find tests of the various T4's at Model...

You can find tests of the various T4's at Model Engine Tests (http://sceptreflight.com/Model%20Engine%20Tests/Index.html)
10-21-2018, 07:04 PM
Replies: 91
Views: 9,167
Posted By downunder

The problem is that what we, as modellers, call a...

The problem is that what we, as modellers, call a diesel is incorrect. Our "diesels" are more correctly called a compression ignition engine. True diesels work quite differently. Our "diesels" need...
Forum: RC Fuels
09-08-2018, 03:39 PM
Replies: 6
Views: 2,243
Posted By downunder

No he won't, well, maybe :). There's a fairly...

No he won't, well, maybe :).
There's a fairly good read about various fuels including both acetone and propylene oxide at https://holdfastmac.asn.au/technical-articles/all-about-fuels/
Way back...
Forum: Glow Engines
07-30-2018, 05:33 PM
Replies: 7
Views: 2,130
Posted By downunder

Late '60's going by this road test :). ST G.40...

Late '60's going by this road test :).
ST G.40 R/C (http://sceptreflight.com/Model%20Engine%20Tests/ST%20G.40%20RC.html)
Forum: Glow Engines
12-18-2017, 07:20 PM
Replies: 2,944
Views: 336,510
Posted By downunder

Hi Amnon, It's best to use the .com...

Hi Amnon,
It's best to use the .com (http://sceptreflight.com/Model%20Engine%20Tests/Index.html) site because I haven't been able to update the .net site for a couple of years. The main idea of the...
10-17-2017, 05:19 PM
Replies: 11
Views: 2,354
Posted By downunder

That's the one area that tends to get overlooked....

That's the one area that tends to get overlooked. What I do is to invert the engine (backplate off of course) and fill the inside of the piston with acetone. Then use an allen key to hook behind the...
Forum: Control Lines
09-27-2017, 07:09 PM
Replies: 4
Views: 847
Posted By downunder

As the commentator said after the flight, that...

As the commentator said after the flight, that was Paul Eisner who's been setting records for years. Not bad for a 2.5cc engine and zero nitro fuel :). The single wing is used to cover as much of the...
Forum: Glow Engines
07-09-2017, 05:06 PM
Replies: 15
Views: 1,039
Posted By downunder

Is the small end of the rod sliding freely along...

Is the small end of the rod sliding freely along the wrist pin?
Forum: Glow Engines
06-13-2017, 06:08 PM
Replies: 2,944
Views: 336,510
Posted By downunder

Agree it's a 60III and will have two piston...

Agree it's a 60III and will have two piston rings. The next version was the 60IIIB which had a single ring and no exhaust baffle plus many internal changes.
Forum: Control Lines
05-06-2017, 08:01 PM
Replies: 199
Views: 48,341
Posted By downunder

1957 and 13YO, an old guy (must have been at...

1957 and 13YO, an old guy (must have been at least early 20's) down the street from me gave me a second hand ETA 29 and taught me how to mix my own fuel and start the engine (the engine actually came...
Forum: Glow Engines
01-10-2017, 04:12 PM
Replies: 16
Views: 1,178
Posted By downunder

Try asking at...

Try asking at https://www.rcgroups.com/forums/showthread.php?1402733-Vintage-Glow-Engines/page978 where there are quite a few very knowledgeable people. That link takes you to the last page unless...
Forum: Glow Engines
01-09-2017, 04:22 PM
Replies: 2,944
Views: 336,510
Posted By downunder

Adjusting (screwing) it out gives more throat...

Adjusting (screwing) it out gives more throat area so lets in more air which gives a little more power at the expense of fuel draw. Screwing it in does the opposite, less power but better fuel draw.
Forum: Glow Engines
10-26-2016, 04:16 PM
Replies: 2,271
Views: 229,829
Posted By downunder

There's a test of your engine at...

There's a test of your engine at http://sceptreflight.com/Model%20Engine%20Tests/ST%20G21-46.html where it states it's a ringed engine with a chrome plated steel liner. If it was my engine I'd run it...
Forum: Glow Engines
08-16-2016, 05:10 PM
Replies: 3
Views: 394
Posted By downunder

I think it's a Fox 74 like the one I have going...

I think it's a Fox 74 like the one I have going by the red head with twin plugs and the carb. Also there's an indication of a 74 underneath that muffler retaining screw. There were two versions, the...
Forum: Glow Engines
07-05-2016, 03:26 PM
Replies: 3
Views: 653
Posted By downunder

Angry sceptreflight

For those who read engine tests, I have a problem right now in that I can't access the .net site to do any updates (the problem is with the server the site is stored on). However the alternative...
Forum: Glow Engines
07-05-2016, 03:16 PM
Replies: 11
Views: 677
Posted By downunder

Generally these pressure taps (if original) have...

Generally these pressure taps (if original) have the same thread as the rest of the backplate screws so find a screw from another OS. Other than that, as said above, the short bit of fuel line...
Forum: Glow Engines
07-02-2016, 06:14 PM
Replies: 2
Views: 543
Posted By downunder

I'm not an expert but the Max-III (both 29 and...

I'm not an expert but the Max-III (both 29 and 35) came out in 1959 and are fairly common. These were the last of the steel finned engines and were quite high performance in their day.

The H29R...
Forum: Glow Engines
06-28-2016, 06:06 PM
Replies: 14
Views: 1,680
Posted By downunder

Crankshaft offset from the cylinder centre line...

Crankshaft offset from the cylinder centre line is called DeSaxe and is fairly rare although all Mercos used it and the Fox 35 (at least) and SC 120 had it. It's not one of those things that engine...
Showing results 1 to 25 of 500
 


 
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