Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Control Line Engines

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Old 10-07-2011, 11:40 AM
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BiggerDanno
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Default Control Line Engines

I have access to quite a few NIB control line engines from .09 to .60 ci.
Most have rear intakes using a venturi. Most do not have provisions for an exhaust.
Many different manufacturers.

Would any of them make a decent speed engine?
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Old 10-07-2011, 01:29 PM
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Default RE: Control Line Engines

any engine can make a great speed engine if you can get enough air and fuel in. We have taken FP/LA/GP cheap sport engines and made them turn some great numbers. The GP 42 is the best of them 10x7 at 15,000. just have to have the right combo. i think most control line engines are set up for torque which would lend them well to mods.
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Old 10-09-2011, 09:48 AM
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Default RE: Control Line Engines

Hi all.

To avoid opening new thread on rather simmilar question.

Ihave old Russian (USSR) Raduga 7 control line engine.

www.youtube.com/watch

It has 7 ccm, and runs on 3:1 methanol : castor oil.

Video above is first run with stock propeller, and glow plug (engine is manufactured on 8/1/1975)

Would it suffice for some kind of speed plane?

RPMrange is in 12000 +/- 1000 static.

I would run it with stock venturi (throttle on 2-position switch).
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Old 10-09-2011, 10:11 PM
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Default RE: Control Line Engines

The original speed engines were ALL control line engines...and to this day a true RC speedplane does not have a carburetor...just a control line venturi.
It is actually impossible to build a nice fairing around a RC type carburetor mounted up front.
Having a carburetor is useless on a RC speedplane and is comparable to having training wheels on a racing bicycle.
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Old 10-10-2011, 08:52 AM
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Default RE: Control Line Engines


ORIGINAL: combatpigg

Having a carburetor is useless on a RC speedplane and is comparable to having training wheels on a racing bicycle.
Nice comparison, thanks.

Could you, please, give me some pointers in size and/or plans for the model Icould build around this particular engine? What fuel tank size should I look for? Would 150 ccm (5 fl. oz.)suffice?

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Old 10-13-2011, 10:45 AM
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Default RE: Control Line Engines


ORIGINAL: BiggerDanno

I have access to quite a few NIB control line engines from .09 to .60 ci.
Most have rear intakes using a venturi. Most do not have provisions for an exhaust.
Many different manufacturers.

Would any of them make a decent speed engine?
Details on displacement and manufacturer?

To briefly answer your question ...... MAYBE.

Many control line engines are very specialized.
CL speed engines - (tiny props, huge rpm, tuned pipe, need proper fairing/cooling)
CL carrier engines - (have to go both fast, and go slow throttled usually open exhaust)
CL stunt engines - (ported for lower rpm, sometimes nearly 4c operation)
CL scale engines - (most like r/c sport engines)
VERY different in construction, porting, intake timing, compression.

Likely if the are rear rotor engines they are configured for speed use.

Pictures?
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Old 10-13-2011, 11:21 AM
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BiggerDanno
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Default RE: Control Line Engines

There are quite a few different ones.
A few that caught my eye because they can attach an exhaust are:
Rossi 60
Veeco 50
and a couple of other 40-60's that I can't remember the make.
There are a lot of smaller diesels too.
Some guy died and left them to our club, I can purchase any I want for $40 ea
Most are not equipped for exhausts and therefore would not be usable where I fly.
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