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Old Sep 28, 2012, 10:18 AM
skypup is offline
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Originally Posted by alan0899 View Post
G'day Skypup,
I ran the FG21 this morning, what a sweet running engine !!!!, idle's at 1850 RPM, with instant pickup, have not touched the idle mixture, HS needle is very rich, about 6 turns out, still running about 5,000 RPM with a 17x6 APC.
I know I'm gunna love this engine when it eventually runs in, sorry you blokes call it break in, I just can't use those words, it suggests I'm breaking it, & I don't want to do that.
I'll continue to run it on the bench for another 30 odd minutes, then it's flying time.

Cheers
Allan.

Keep Thine Airspeed up, lest the ground arrise & smite thee.
Allan

What will you be flying her in? Can't wait for your flight report.
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Old Sep 29, 2012, 05:06 AM
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Allan

What will you be flying her in? Can't wait for your flight report.
G'day Skypup,
She is destined for a Phoenix Spacewalker, the exact same as yours, see post # 27.
I may be some time before I get to fly her, as I'm still waiting to get my shed built, I have the concrete slab, & the shed arrived last week, but my builder was in hospital, until Friday of this week.
This how I set her up.
Old Sep 29, 2012, 07:14 AM
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Originally Posted by alan0899 View Post
G'day Skypup,
She is destined for a Phoenix Spacewalker, the exact same as yours, see post # 27.
I may be some time before I get to fly her, as I'm still waiting to get my shed built, I have the concrete slab, & the shed arrived last week, but my builder was in hospital, until Friday of this week.
This how I set her up.
Looking good Alan. I may need to try a 17x6 APC. Using a lighter and smaller wooden prop my idle was not as low.
Old Nov 02, 2012, 01:25 PM
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3 blade prop


horizon hobby website sugest that FG21 should swing 3-blade prop 14 x 9 to 15 x 7

Do you think I can install a 3 blade 16X10??
this one in particular:
http://www.troybuiltmodels.com/items/BP1610-3BY.html

I just like this Biela becauseit looks scale...OR
DO you guys/girls know of a good 3-blade prop 15X8??

THANKS
Last edited by cerralvo78; Nov 02, 2012 at 01:26 PM. Reason: add more info
Old Nov 02, 2012, 02:22 PM
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Originally Posted by cerralvo78 View Post
horizon hobby website sugest that FG21 should swing 3-blade prop 14 x 9 to 15 x 7

Do you think I can install a 3 blade 16X10??
this one in particular:
http://www.troybuiltmodels.com/items/BP1610-3BY.html

I just like this Biela becauseit looks scale...OR
DO you guys/girls know of a good 3-blade prop 15X8??

THANKS
I can't say for sure. Since gassers run hotter than nitro engines if I had to make that choice I would stay with a recommended prop, especially until the engine was well broken in. 16x10.....quite a bit of pitch. Just my opinion. I can't back this up with experience.
Old Nov 04, 2012, 09:35 PM
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Good advice from Mr Skypup. Stick with the recommended props - the engine will overheat if you overprop it. Not a big deal, but you will find the engine running ragged at WOT after about 5 minutes until it dead sticks.
Old Nov 05, 2012, 03:14 AM
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I can't say for sure. Since gassers run hotter than nitro engines if I had to make that choice I would stay with a recommended prop, especially until the engine was well broken in. 16x10.....quite a bit of pitch. Just my opinion. I can't back this up with experience.
G'day Skypup,
In my FG21 manual, it states the prop range as 15x6 to 17x6, I have not overpropped it, I'm just at the upper limit.
I finally have my shed built, see pix, all I need to do now, is to get power & lights, & all my benches, lathe, drill press, grinder, tools & planes, in it & I will start my Spacewalker.
Last edited by alan0899; Nov 05, 2012 at 04:38 AM.
Old Nov 05, 2012, 04:12 AM
bogbeagle is online now
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Spiffing shed.
Old Nov 05, 2012, 04:41 AM
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Spiffing shed.
G'day Mate,
Taa. It has taken 17 months to get it this far.
Not much to do now.

Cheers
Allan.
Old Nov 08, 2012, 02:16 PM
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Is that the well known British 'Garden Shed', known in the US as a 'Man Cave'

John C
Old Nov 11, 2012, 11:53 PM
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Is that the well known British 'Garden Shed', known in the US as a 'Man Cave'

John C
G'day John,
I'm NOT British, I'm an Australian, & NO, It's my shed, we don't live in caves here.
Cheers
Allan.
Old Apr 07, 2013, 03:43 PM
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I just picked up a used fg-21. I started it ok but it stops as soon as you get above half throttle.
As it is used it is not set to factory settings . I am looking for some tips on tuning this engine.

Do you tune as per a glow 4 stroke or being gas is there a different procedure
Old Apr 07, 2013, 08:57 PM
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I would try opening the needle valve 1/2 turn at a time and see if this solves the problem. Otherwise try blowing through the fuel line and see if it is clear at full throttle. Sounds like blockage from needle valve setting or stuff in the high speed jet system is your problem.

John C
Old Apr 08, 2013, 01:43 PM
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I will check for blocks cheers John I also have ordered a new plug as the old one looked worn away making the gap very large
Old Jun 09, 2013, 01:35 PM
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I ended up sending this back to the shop. One new carb and it now runs well. A strange thing keeps happening though. Idle is good on the ground and in the air but every time I land the engine idle slows right down then cuts. The prop clearance is good so its not catching. It has not been a problem as it only cuts once on the ground. I just would like to know why?
Last edited by philip b; Jun 09, 2013 at 01:46 PM.


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