RunRyder RC
 7  Topic Subscribe
WATCH
 1 page 710 views POST REPLY
ProModeler Scorpion Power
HelicopterMain Discussion › How does the regulator work in 55HZ-R or 105HZ-R ?
08-27-2016 11:54 AM  10 months agoPost 1
Vaderluck

Senior Heliman

Melbourne - Australia

My Posts: All  Forum  Topic

I would like to know how the regulator work before disassemble it to clean.
Anyone got info how they work ?

PM  EMAIL  GALLERY  Attn:RR
08-28-2016 02:36 AM  10 months agoPost 2
dkshema

rrMaster

Cedar Rapids, IA

My Posts: All  Forum  Topic

What's inside:

From left to right, along the bottom row of parts:

Needle valve
Lever
Spring
Pin which holds the lever in place, and about which the lever pivots
Silicone diaphragm
Screws that hold the two halves together.

Top parts are the housing top and bottom halves. Note the the bottom piece has five holes in its center, therefore this side of the silicone diaphragm is subject to ambient air pressure.

-----

How it works:

Fuel, pressurized somewhere between 2 and 12 PSI (from the crankcase via a one-way check valve connected between the backplate of the motor and the vent line of your fuel tank) will enter the regulator at the carburetor nipple.

The needle valve (stop valve in the picture) is spring-loaded (by the lever and spring) such that normally, the fuel inlet is plugged, and no fuel enters the regulator.

The top side of the silicone diaphragm is at ambient air pressure. When the piston in your motor is on the up-stroke, there is an area of low pressure in the venturi of your carburetor, where the spray-bar is located. This puts the bottom side of the diaphragm at a lower pressure than the opposite side which is at ambient air pressure. The center of the diaphragm moves downward, the right end of the lever goes down with it, while the left end pivots up slightly. This pulls the needle valve up slightly, so it's no longer plugging the carb inlet, fuel flows into the regulator body, and into the engine's main needle/spraybar assembly.

On the downstroke of the piston, the low pressure area in the venturi is no longer present, the spring and lever force the inlet needle valve closed again, until the next cycle.

This is a demand regulator. Fuel is only allowed into the lower chamber when the engine needs it.

The OS regulator is a refinement of the Cline regulator which James O'neal at OMI used to install on certain large OS 91's.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

PM  EMAIL  GALLERY  Attn:RR
08-28-2016 02:51 AM  10 months agoPost 3
balsapro

Veteran

Gallatin,TN

My Posts: All  Forum  Topic

other than location how is this different from the YS regulators?

seems very similar to me.

Build the Best, Fly the Best, Crash the Best

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR
08-28-2016 03:14 AM  10 months agoPost 4
dkshema

rrMaster

Cedar Rapids, IA

My Posts: All  Forum  Topic

They are similar, just implemented in a different manner.

The other difference, is that YS pretty much has had a demand regulator all along.

OS had to go through several iterations of fuel delivery systems before finally going with the obvious solution.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

PM  EMAIL  GALLERY  Attn:RR
08-28-2016 03:26 PM  10 months agoPost 5
Four Stroker

Elite Veteran

Atlanta

My Posts: All  Forum  Topic

YS and OS similar idea. YS went through many iterations of what the diaphragm should be made from. Settled on tiny condoms. YS uses timed positive pressure to open the fuel valve. YS diaphragm not exposed to the atmosphere.

Model carburetors started out as low venturi pressure sucking fuel and an idle air bleed screw. After many years of iterations we now have more real carburetors.

Similarly we now have real battery chargers that monitor individual cells. Would have been better on nickel cadmium cells as well. Original NiCD chargers were a diode and a resistor at 120 Volts.

PM  EMAIL  GALLERY  Attn:RR
08-29-2016 01:10 PM  10 months agoPost 6
Vaderluck

Senior Heliman

Melbourne - Australia

My Posts: All  Forum  Topic

Thanks dkshema. Always very helpful.
The diaphragm is made from silicone. So would it suffer the same fate as the the fuel tube clunk where it is soften/broken down sometime later ?

PM  EMAIL  GALLERY  Attn:RR
08-29-2016 02:19 PM  10 months agoPost 7
Four Stroker

Elite Veteran

Atlanta

My Posts: All  Forum  Topic

More importantly, it will be destroyed if you use the typical non-silicone safe after run oil.

PM  EMAIL  GALLERY  Attn:RR
08-29-2016 03:58 PM  10 months agoPost 8
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

On the OS, due to the reg's physical position on the engine, you can get away with using ATF or similar petroleum based preservative oil and not foul the reg's diaphragm. We all did so for years, and in that "we" was the man who was instrumental in the design of it. In the case of the YS reg, there is a direct communication between the crankcase and the reg on the bottom of the front housing, so a silicone safe oil is imperative.

The silicone diaphragm in the OS has excellent longevity. Remember that the primary reason the silicone tubing in a fuel talk goes bad is due to exposure to exhaust gases as occurs with a muffler pressure set up. Tubing lasts WAY longer in these backplate pressure driven engines.

Ben Minor

Team Synergy Team Futaba Team Kontronik USA
Progressive RC

PM  EMAIL  GALLERY  Attn:RR
08-29-2016 10:26 PM  10 months agoPost 9
ssmith512

Key Veteran

Indianapolis, IN USA

My Posts: All  Forum  Topic

Tubing lasts WAY longer in these backplate pressure driven engines.
I concur. Been using the same tank clunk line for over two years now.

Steve

PM  EMAIL  GALLERY  Attn:RR
09-02-2016 12:54 AM  10 months agoPost 10
YankieSole

Senior Heliman

Lynchburg, virginia

My Posts: All  Forum  Topic

Is there a trick to getting the diaphram back inside the regulator after disassembly? I took mine apart to clean it after buying the engine second hand and man was it a pain in the arse to get back together.

Robert

PM  EMAIL  GALLERY  Attn:RR
09-02-2016 01:27 AM  10 months agoPost 11
wjvail

Key Veteran

Meridian, Mississippi

My Posts: All  Forum  Topic

Hmmm... It shouldn't be hard to reassemble. The diaphragm just drops in and the case bolts up. How was your's difficult to put back together?

The below video won't help you put your diaphragm back in but does speak to the OP question.

Watch at YouTube

"Well, Nothing bad can happen now."

PM  EMAIL  GALLERY  Attn:RR
09-02-2016 01:58 AM  10 months agoPost 12
YankieSole

Senior Heliman

Lynchburg, virginia

My Posts: All  Forum  Topic

Sorry about that. Didn't mean to hijack the thread. My diaphram didn't want to sit down in its place. It was a pain to get the two halves back together without pinching it

Robert

PM  EMAIL  GALLERY  Attn:RR
09-02-2016 03:43 AM  10 months agoPost 13
Locktite

Veteran

N.J

My Posts: All  Forum  Topic

Nice video

Synergy 766 - SAB Black Thunder 700x2- Black Nitro 650- Align 700X/700N DFC SAB 500 Sport

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR
WATCH
 1 page 710 views POST REPLY
ProModeler Scorpion Power
HelicopterMain Discussion › How does the regulator work in 55HZ-R or 105HZ-R ?
 Print TOPIC  Make Suggestion 

 7  Topic Subscribe

Friday, July 21 - 3:41 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online