RunRyder - Webra .55 P5

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Engines Plugs Mufflers Fuel > Webra .55 P5

dialarotor
Veteran
Location: Traverse City, Michigan

Anyone out there seen, heard or flown one of the new WEBRA .55 P5 engines?
Would like to hear what others have to say. Webra also makes two mufflers for this engine depending on if you are using it on a Raptor, Caliber, or Sceadu. Would be a good choice for the Tiger/Pantera.

Dialarotor

Carbon fiber paint stick maker

04-21-2006 Over year old.

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amoss007
Senior Heliman
Location: Sydney, Australia

Just started running one in on the weekend in my sceadu evo 50. Using the magic pipe that is designed for the 55. Starting off with a mix of 0% nitro 20% rc3 castor and 80% meth

it is unbelievable to see a heli run on 0 nitro as I'm used to running 20% in my hyper.

Will post more as she runs in. Plan on running 10% nitro which is the most that webra specify before having to muck around with shims

Heli pilots do it inverted

04-24-2006 Over year old.

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tomthumb
Senior Heliman
Location: Duarte California

Please keep us posted as I am very interested as well.

LOWER LOWER DOH!!!

04-25-2006 Over year old.

amoss007
Senior Heliman
Location: Sydney, Australia

next day of run in

going great guns - although i hate cleaning up the castor. Going brilliantly - brought in the low / mid needle and have the response a lot better while keeping the high needle quite rich as exhibited during the climbouts.

What is amazing is that the flight times while just mucking around hovering / pirouetting has gone to about 13 ~ 14 minutes which is just fanstastic.

About to move to my primary mix of kl198 and 5% nitro will keep treating the engine with kid gloves till after 20 flights. At approximately 5 flights at the momement.

For all those with evos it is a drop replacement for the os 50. I have had absolutely no vibrations in any parts of the heli.

loving the zero nitro.

will report back with more on sunday (aussie time)

Heli pilots do it inverted

04-25-2006 Over year old.

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Jafa
Elite Veteran
Location: Sydney, Australia

04-26-2006 Over year old.

PietervA
Veteran
Location: New Zealand

8 litres through mine: 4 of castor/meth, 4 of 5% nitro/18% Klotz. Not quite the power of my Hyper on a pipe, but perhaps it's early days. Certainly smooth and sounds nice. Was surprised how well she ran on castor, and how much c**p I had to clean off the heli afterwards.

A word of warning: there appears to be far more interaction between top and idle needles than in previous Promix II carbs. Perhaps it's the regulator. Certainly had to richen the hover needle, as I leaned the top.

Ultimate test for me is P5 with pipe (Hatori 540). We're contending with floods in NZ at the moment, so might be a while!

04-26-2006 Over year old.

suek_sern
Heliman
Location: Penang - Malaysia

is it easy to tune versus hyper? More power?

04-27-2006 Over year old.

amoss007
Senior Heliman
Location: Sydney, Australia

won't know fully - but it has been pretty easy so far and pretty predictable. The manual say to make sure all your changes are small. A mate has pointed out that the thread on the main needle is coarser then the hyper so each adjustment is bigger so instead of two clicks I'm doing 1 at a time. Also each click in on the main results in a change to the mid needle. Will work out the relationship and report back.

Heli pilots do it inverted

04-27-2006 Over year old.

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andyp
Senior Heliman
Location: New Zealand

The Webra 55 P5 looked like an interesting engine so I was keen to try one - I have been fortunate enough to have tested the 55 P5 for a couple of weeks now.

I have put together a review which is available for download in My Gallery

So far I have run over 12 liters of fuel thru the engine and it is producing good power and is very smooth and reliable. The engine is definitly not short of power! I have been running it on 15% nitro and 23% oil.

The new Webra regulator works very well and the mixture is very consistant from full tank right down to the end of the header.

Please feel free to ask any questions on the set up or performance.

Andrew

QuickUK Flight Team
Fromeco Regulators and Batteries

04-28-2006 Over year old.

Gary Jenkins
Elite Veteran
Location: Wilmington, DE

Anyone selling the regulator in the US?

04-28-2006 Over year old.

PietervA
Veteran
Location: New Zealand

Cyberheli has them, and will (for a small fee) post them to the US

04-29-2006 Over year old.

Jafa
Elite Veteran
Location: Sydney, Australia

Nice review Andrew

Most carburetors don't make much vacum, that's one reason why we need at least exhaust pressure. This is also why the 60M carb off the PS does not work without a perry pump, that carb has even lower suction (note that OMI refuse to mod this carb). AMoss007 and I tried a cline regulator on a standard CSpec, it ran out of fuel supply during climbouts, so the OMI modifications are absolutely essential.

The exhaust pressure feed to the Webra Regular is a way of assisting the carb to open the regular on a "demand" basis, the more revs the more it opens the regulator. It's a great idea...

Lepton | TRex600Nitro | Sceadu | Freya | Avant | Predator Carbon Max

04-29-2006 Over year old.

amoss007
Senior Heliman
Location: Sydney, Australia

more flights on the webra today

Started running my normal fuel mix of 5% nitro (angus) 20% kl 198 and the rest meth. Had a friend who is exceptionally good at auto do the flying for me which made tuning a breze as I could hear the low end the whole way down.

Did 2 flights before the rain came and managed to move in 4 clicks on the high end needle. The webra is smooth and predictable. The head speed is around 1830 but still rich. On each change on the main needle I had to check the midrange to make sure it didn't become lean. I think twice I brought it out about 1/4 ~ 1/3 of a turn to bring it back inline.

I find the webra carb reliable and easy to tuen. Can't wait to get this engine on the hammer. At all times through the run in backplate temperature remained stable.

stay tuned

Heli pilots do it inverted

04-30-2006 Over year old.

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andyp
Senior Heliman
Location: New Zealand

A bit of an update - going great!

This engine keeps getting better and better. Over 6 gallons (24 liters) thru it. It has been very reliable and certainly no sign of any bearing issue (which has been a thorn in OS's side).

Running with a head speed of 2000rpm on a R50 it really pulls well under load.

It does seem to have found a permanant home in my heli!

Andrew

QuickUK Flight Team
Fromeco Regulators and Batteries

05-18-2006 Over year old.

PietervA
Veteran
Location: New Zealand

Just a quick word of warning regarding the one-way valve, unless you have Webra's latest low resistance valve. There's a real risk of running your motor lean if the tank doesn't pressurise adequately.

The one that came with my P5 last month needs quite a high pressure to allow crankcase gas through, and doesn't seal particularly well. The issue appears to be a spring that's a tad too firm (where removal of a turn on the spring goes part way to solve the problem), and oil collecting behind the membrane as a column of fluid.

I've had to resort to a medical-grade silicone one-way valve to carry on flying, until a replacement arrives. The motor is (valve problems notwithstanding)) a real gem, with great power, transition that's smooth as, and a carb that's really easy to tune.

Take care out there.

05-19-2006 Over year old.

dogg5306
Senior Heliman
Location: Brussels, Belgium

>>> andyp

Quote
Running with a head speed of 2000rpm on a R50 it really pulls well under load

Isn't 2000rpm supposed to be the maximum the engine can handle...

For hovering 1600rpm should be enough... am I correct on that one

____________________
Miniature Aircraft Stratus
Avant Aurora
JR Vibe 50 3D (soon!)

05-19-2006 Over year old.

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Jafa
Elite Veteran
Location: Sydney, Australia

Most 50's can do 20,000 rpm - the OS50 and the Webra's certainly can
On a Raptor 50 that would be a head speed of ~2300
Way to high for the head and blades

2000 rpm on the head is great for 3D

Lepton | TRex600Nitro | Sceadu | Freya | Avant | Predator Carbon Max

05-19-2006 Over year old.

robhurlin
Veteran
Location: Pretoria, South Africa

I have just moved up to a head speed of 2100 on my R50SE and Hyper/MPII. It flies better and the engine is happier and everything is solid. Try it!

Rob.

05-19-2006 Over year old.

amoss007
Senior Heliman
Location: Sydney, Australia

andyp what fuel mix are you running??

I'm hoping to get my sceadu evo on song tomorrow.

Heli pilots do it inverted

05-20-2006 Over year old.

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andyp
Senior Heliman
Location: New Zealand

Hi

With the Webra engines I think it is important to follow their recommendation to first run the engine in on a mix of 20% Caster oil and 80% Methanol (no nitro). I would put 1 - 2 gallons of this thru the engine (4 - 8 liters). Some may disagree, but this is Webras recommendation and I find it works very well.

After the run in period I feel any good quality synthetic oil (18-20%HV, 23%LV) based fuel will work well. I have now played with several oils, and 20% CoolPower blue seems as good as any, and I am sure your Klotz will be okay. I am running 15% nitro with no shims and the engine seems very happy on this mix.

I have not tried more or less nitro, but would imagine the engine would need a head shim on 30%. I am very happy with the power on 15% (and I was running my previous engines on 30% and this is going better).

Andrew

QuickUK Flight Team
Fromeco Regulators and Batteries

05-20-2006 Over year old.

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Engines Plugs Mufflers Fuel > Webra .55 P5

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