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HomeAircraftHelicopterMain Discussion › If Nitro is done...
01-22-2015 05:13 AM  3 years agoPost 81
EEngineer

rrProfessor

TX

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real developments on nitros is bigger displacement
Not quite....Ronald Valentine(Speed-Demon) has developed further how to hop up 2-cycles further even more.

Google him....now, he's into diesels....

"XenaLook", with Ron's help, have hopped up 2-cycle Cox engines by additional porting...Cox are 2-cycles, for those not familiar.

If they had a tuned pipe for a Cox....it'd be ballistic....

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01-22-2015 12:33 PM  3 years agoPost 82
jharkin

rrApprentice

Holliston, MA - USA

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Yeah, there are ways to increase power in a 2 stroke without increasing displacement - changes to porting to support higher RPM, going to higher nitro (requires lower compression), playing with ignition timing via changing the plug heat rating, and most importantly of all tuned pipes.

Just look at the nitro pylon racing crowd. A lot of the classes are displacement limited and you have specialist manufacturers like Nelson and Jett Engineering making very high power 40 size nitro engines.

The downside is that all that work is expensive, and results in an engine that is very peaky and makes that ridiculous power in a very narrow high RPM band. Fine for racers who are WOT all the time but not useful for everyday sport and aerobatic plank pilots.

As a matter of fact I have a Q500 pylon ship, with an old O.S 46FX on it that I modified with a "ceramic" anodized alum liner, ceramic main bearings and Jett engineering tuned muffler. the result is it turns a tiny 9x9 pylon prop at over 16k on the ground on 15% and is probably good for 120+ mph. If I wanted to I could get even more by shimming the head to drop compression and going up to 40% nitro... but I dont race so why? Downside is that I have to wear earplugs to start it, I only get 4 minutes on a tank of fuel and the throttle is basically an on/off switch.

anyone want to buy it?

All of that is a very long winded way to say that these power modifications are good in specific applications... but for many of us its a lot cheaper, easier and more flexible to just go up in displacement.

-Jeremy
Whiplash-G
Helix 700G
T-Rex 450 fbl conversion
alot of planks

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01-22-2015 12:38 PM  3 years agoPost 83
jharkin

rrApprentice

Holliston, MA - USA

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Right. It's just a hobby too. Easy to get carried away. It's all for fun, and not right or wrong. My favorite is what I am flying at the moment...
Amen!

To get back on topic - 100% agreed. I'm glad that there is still new development ongoing in nitros as I like to and hope to continue to fly nitros, gas and electrics. I find all of them interesting and each has its strengths.

I love glow engine 4 stroke planes or being marvels of engineering and having such a cool sound. I love gas for cheap long flight time with no fuss, no cleanup and minimal support needs. I love electric for ridiculous power and cool quiet operation. I would want to give up any of them.

I saw a while back that Horizon tired introducing an EFI gasser engine for planks recently. If this where to catch on I would be willing to try it, my only hesitation is like I said there is a track record of theis being introduced before but then goes off market because nobody buys them.

EDIT - As I suspected, that Horizon EFI engine got discontinued very quickly, a shame. (Evolution 62GXi).

-Jeremy
Whiplash-G
Helix 700G
T-Rex 450 fbl conversion
alot of planks

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01-22-2015 05:37 PM  3 years agoPost 84
Mikerobe

rrVeteran

Green Turtle Cay,Abaco, Bahamas.

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Shipping the popcorn from here is gonna be expensive!

The lot I got is not a lot, but I thank God a lot for the lot I got!

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01-22-2015 07:09 PM  3 years agoPost 85
ICUR1-2

rrElite Veteran

Ottawa, Ontario

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we'll all chip in for the popcorn

I never really understood changing the plug for timing,
because I wouldn't know what to look for

I have a hearing impairment and could not tune a guitar to save my life
if two people talk at same I can't understand either. any med/background noise does same as 2 people talking.

I just went by temp & then performance but I can still burn a ring easy

sometimes flying electric will trick you when I fly my nitro
It will be wow it's peppy today then 5 min later OH wait this ain't E and sure enough pop went the ring

sounds like an angry bee hive sometimes

if "OS" could "INNOVATE" something for The "MARKET"
I would sign up for one

spending time, paying attention

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01-23-2015 01:25 AM  3 years agoPost 86
hoosierheli

rrNovice

South Bend IN

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ahf 50 greatest heli ever built....
This gave me a laugh, (hate to admit looked a bit like me with my hawk 30 when I started).

Watch at YouTube

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01-23-2015 02:07 AM  3 years agoPost 87
BobOD

rrElite Veteran

New York- USA

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LOL
Yep, I guess that video is a great example of why electrics are so popular with most folks today.

Team POP Secret

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01-23-2015 02:49 AM  3 years agoPost 88
don s

rrElite Veteran

Chesapeake, VA

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Nice video, blame the engine.

Poor craftsman blames his tools...

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

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01-23-2015 05:24 AM  3 years agoPost 89
ICUR1-2

rrElite Veteran

Ottawa, Ontario

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video
that's why a lot of heli guys quit right there.

lack of experience and expecting good results right away

keep those flying clubs alive

spending time, paying attention

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01-23-2015 05:34 AM  3 years agoPost 90
EEngineer

rrProfessor

TX

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I remember some video here...that after an embarrassing crash...he kicked the wreckage....thought this guy might do the same...

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01-23-2015 12:08 PM  3 years agoPost 91
S.Dykes

rrApprentice

Wesley Chapel, FL - USA

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Funny video. That guy should stick to electric.

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01-23-2015 12:25 PM  3 years agoPost 92
FastR1Red

rrApprentice

Melbourne Australia

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Great production, thought it was funny LOL....

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01-23-2015 02:36 PM  3 years agoPost 93
kingmeow

rrApprentice

The Garden State, US

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Man, that engine exhaust sure left a lot of black crap on the ground! Was it burning diesel????

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01-23-2015 02:57 PM  3 years agoPost 94
JasonJ

rrKey Veteran

North Idaho

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That video was awesome. That was how my first flight went except it was a crappy little Walkera 22E electric and I crashed much faster than he did. On the plus side my neighbor was outside, saw the whole 10 second awesome fest and said "I don't think they are supposed to do that". Yep, that 10 second flight started it all......thank God it was a cheap electric and not an expensive fuel helicopter.

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01-23-2015 05:28 PM  3 years agoPost 95
Santiago P

rrProfessor

South West, Ohio

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( warning, the following post contains dangerous
amounts of sarcasm, parental guidance is adviced
)

I am so glad nitro (ICE engies) was all we had for so long.

It helped weed out the true modelers from the flash in the pants crowd who wanted to try it cus it was cool. You had to be a persistent moron to hurt yourself with one.

These days anyone can go from opening the box to the hospital in little time, with minimum skills...

LOL

I like my electrics, but LONG LIVE internal combustion engines

S

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01-23-2015 05:40 PM  3 years agoPost 96
rudyy

rrElite Veteran

E. Amherst, NY

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Do not think it is the engine giving in. I can hear some stripped gear noise when the heli was spooling up, which is a sign of NO GO.

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01-23-2015 06:04 PM  3 years agoPost 97
Aaron29

rrProfessor

USA

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flash in the pants crowd
Sounds serious! Ouch.

LOL!

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01-23-2015 06:05 PM  3 years agoPost 98
Aaron29

rrProfessor

USA

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Let's get an external combustion engine going. No?

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01-23-2015 06:40 PM  3 years agoPost 99
rexxigpilot

rrProfessor

Florida

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It helped weed out the true modelers from the flash in the pants crowd
Ouch! That could be painful. I'd rather have that flash in my pan. That's an old gold miner's term BTW, not cooking.

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01-23-2015 06:43 PM  3 years agoPost 100
don s

rrElite Veteran

Chesapeake, VA

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Flash in the pan?

Flintlocks right?

E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.

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