Screamin Demon .65, flights 3&4
10-02-2012, 02:28 PM
#26
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RE: Screamin Demon .65, flights 3&4
Sounds like you are right on par for the course! I opened up my flight box one day at the field and a fellow modeler asked me if I had a spare glowplug. I replied that.... yeh.....I always carry at least 12 of them with me on any single day. Then I had to try to explain to him why they would probably not work in his sport engine. I gave him one anyways just to get him back in the air. After his flight and a dead stick landing he brought it back and told me they were no good. Go figure! 
10-02-2012, 02:43 PM
#27
RE: Screamin Demon .65, flights 3&4
ORIGINAL: MJD
In four flights I've eaten two plugs and one prop, that works out to about $26.00, or $6.50 per flight plus fuel.
In four flights I've eaten two plugs and one prop, that works out to about $26.00, or $6.50 per flight plus fuel.
OTOH, that can happen on the 1st flight if you are too lean, overly compressed or too much vibration.
I was hoping to hear that these engines could easily take a little plane like this to 200 mph without any issues, but as usual my wishfull thinking is met with the reality that there is no free lunch in physics.
10-02-2012, 04:05 PM
#28
RE: Screamin Demon .65, flights 3&4
The danger with using old plugs is having the element break off and end up getting wedged between the piston and the liner.
10-02-2012, 04:22 PM
#29
RE: Screamin Demon .65, flights 3&4
The worst case of indigestion for me was with a RIRE K&B that ate a #4 lock washer that was rattling around in the engine bay. Split lock washers really don't have any business being on engines, but that's a long story.
Figure a bad "routine" flight eats a $4 Nelson plug, breaks a $15 prop and guzzles $1 worth of fuel. I might as well just pay my $20 and go drag racing.
Figure a bad "routine" flight eats a $4 Nelson plug, breaks a $15 prop and guzzles $1 worth of fuel. I might as well just pay my $20 and go drag racing.
10-02-2012, 04:44 PM
#30
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RE: Screamin Demon .65, flights 3&4
What about iridium element glowplugs?
Anyone tried these:
http://www.lrp.cc/en/products/nitro-...kerze/details/
What are the F3S guys using?
Just curious.
Anyone tried these:
http://www.lrp.cc/en/products/nitro-...kerze/details/
What are the F3S guys using?
Just curious.
10-02-2012, 06:11 PM
#31
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RE: Screamin Demon .65, flights 3&4
Platinum-iridium alloy is pretty standard for glow plugs, it is stronger and has better chemical resistance than pure platinum, which is quite soft.
10-02-2012, 06:39 PM
#32
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RE: Screamin Demon .65, flights 3&4
ORIGINAL: combatpigg
I was hoping to hear that these engines could easily take a little plane like this to 200 mph without any issues, but as usual my wishfull thinking is met with the reality that there is no free lunch in physics.
I was hoping to hear that these engines could easily take a little plane like this to 200 mph without any issues, but as usual my wishfull thinking is met with the reality that there is no free lunch in physics.
12-30-2012, 10:34 AM
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RE: Screamin Demon .65, flights 3&4
Hi.
I would like to ask for help.
What engine do it 722cm Wingspan
machine? Me 6.5ccm MVVS engine is.
http://www.modellhungaria.hu/gfsrabcrc-3066-p-4359.html
which direction engine draft?
I would like to ask for help.
What engine do it 722cm Wingspan
machine? Me 6.5ccm MVVS engine is.
http://www.modellhungaria.hu/gfsrabcrc-3066-p-4359.html
which direction engine draft?
