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HelicopterHenseleit 3DNT - Rocket - 3DMP › help webra engine
10-25-2004 04:01 AM  13 years agoPost 1
ATHAM

rrVeteran

santa clara

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Hi everybody that using 3dnt and webra combination

i tried to tuned my webra last saturday.
i followed stephen instruction to tuned that in...
i can get constant temperature when its idle and little bit of thortle..around 95-100 f (same as my forehead ).

and when i tried into hover...the rpm really low so i bring up the thorttle.
after i can hover....seems the smoke constant but i hear the engine too rich....
what should i do at this point? lean the main or lean the low?


so what should i do guys?

i know its a liittle bit hard to tune this webra engine...
i spend 2 gallon with straight fuel and 12% of synthetic oil after i running in the engine with 10% nitro with all castor.


thanks for everybody help

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10-25-2004 09:52 PM  13 years agoPost 2
GBNT

rrApprentice

uk

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Is this the link Here
If it isnt, then try this (its how I found this link)
click on search, type Stephen into members name box on the right, and type webra in the search box on the left. Comes up with about 25 (some are quite big!) results.
I hear the webra setup has been quite a challenge for some people.
Hope it goes OK

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11-15-2004 05:44 PM  13 years agoPost 3
ATHAM

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santa clara

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TTT

R90 SE YS91
trex600n YS50
trex450 v2 medusa
trex600 xl

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11-16-2004 04:17 PM  13 years agoPost 4
ATHAM

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santa clara

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no one can help me?

R90 SE YS91
trex600n YS50
trex450 v2 medusa
trex600 xl

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11-17-2004 08:19 AM  13 years agoPost 5
G.Man

rrProfessor

Bristol

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Atham

the webra is not like an OS where you can just lean one needle...

If you lean the main 1 click you need to open the idle about 1/8th of a turn or more...

Webra carbs are a balancing act, but when tuned you do end up with great carburetion accross the throttle range, just takes some time to get it spot on... Once done you can usually just adjust the main 1 click either way depending on air temp etc...

Don't Email me as I wont reply - PM Only (spam countermeasures)

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11-17-2004 03:13 PM  13 years agoPost 6
Stephen

rrApprentice

Hong Kong

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no one can help me?
Didn't you get my PM?????

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11-17-2004 03:47 PM  13 years agoPost 7
ATHAM

rrVeteran

santa clara

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got your pm just 5 min ago
thanks amuway
i'll try this weekend
thanks

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11-17-2004 08:05 PM  13 years agoPost 8
blade3d

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New Jersey USA

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I have a Webra 75 and thought it was like an OS boy was I wrong ,, the Webra gave me frustrations I have never experienced in my 15 yrs of flying Heli's untill I fugured it out the low is the high and the high is the low,, they could have just said that, took me about three or four gallons to figure that out.

Blade3d
Rupert

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11-17-2004 08:38 PM  13 years agoPost 9
shuttlepilot

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Mullins, South​Carolina

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I'm running a Webra 50 green head on straight fuel and 16% syn oil. My high speed needle is right at 1 turn out. I think the low speed is right at 2 turns. The Stephen method didn't come at all close for my engine. I started rich and worked my way EVER so slowly to the leaner setting. The low speed needle will show changes with as little as 1/10 of a turn. I'm running a venom temp monitor and hovering around the temp is around 270 degs. Which the folks at Webra said was just fine. When in ff and doing aeros I will occasionally come to hove to check the temp and it is usually around 250 or so. It took over 4 gallons to get this engine boken in, or what I would say was broken in. I have now run over 12 gallons through it and it's still running great. I'm using an Enya #3 (hot) plug. Recently took off the head to check the top of the piston and cylinder. Top of piston looks a little tan, and the cylinder walls still have honing marks in them. Webra's are great engines, but they take much patience and very small tweaks to the needles over gallons of fuel to make them happy. Once they are set though, they run great.

Gas is Great
Camper Fuel is Better!!
QWW Helis

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11-22-2004 01:40 AM  13 years agoPost 10
ATHAM

rrVeteran

santa clara

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hover with low rpm and switch to idle 1 about 1700 rpm...running good
except after i put full + pitch and suddenly put full - pitch the heli a little bit choking...i think the mid is too rich but i dont have much time to deal with that this week.....will try again next week

but so far the result is good

thanks everybody and specially for stephen a really good guy from cyberheli.

R90 SE YS91
trex600n YS50
trex450 v2 medusa
trex600 xl

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11-22-2004 04:36 PM  13 years agoPost 11
ATHAM

rrVeteran

santa clara

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what do you think guys about my situtation above?

im using ultramix carb only have high and mid needle
should i lean the mid needle and rich the high needle?
or just lean the mid and leave the high needle alone?
the smoke had smae trail when i switch between normal mode and idle 1 mode


thanks for everybody input

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11-22-2004 08:41 PM  13 years agoPost 12
blade3d

rrElite Veteran

New Jersey USA

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When you say it choked does that mean it had no smoke or did it stall for a moment ?

Blade3d
Rupert

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11-22-2004 11:13 PM  13 years agoPost 13
ATHAM

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santa clara

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choke like no smoke at moment (1 sec) and then have a lot of smoke (like its too rich) and the rpm going down

i think its too rich but im not sure

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11-24-2004 01:05 AM  13 years agoPost 14
blade3d

rrElite Veteran

New Jersey USA

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When mine did that I was lean on the high end,, richen the high end and try it again keep richening the high end untill it stops,,then lean the low untill you get a good hover,, once you get a good hover punch it full positive then keep leaning the low untill you get the results you want that should do it remember the high doesn't really set from the high end needle it sets from the low about 80% of carb travel.

Blade3d
Rupert

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11-26-2004 09:32 PM  12 years agoPost 15
ATHAM

rrVeteran

santa clara

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hi everybody,
is that normal if on the idle mode around 1800 rpm after couple of second in hover, the engine just has a little bit of smoke sometimes looks like no smoke?
but when its normal its a lot of smoke.....
and the temp reading about 210 f just after flight.

is it too lean on top? if i richen the top its going too rich (no power)

im using 88% methanol and 12 % of oil
thanks

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11-29-2004 02:29 AM  12 years agoPost 16
ATHAM

rrVeteran

santa clara

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i had couple of settup flight and i need help from the expert.

i hovered with 1400 rpm with plenty of smoke and when i hit the idle mode 1 around 1800 still had a plenty of smoke but after about 10 second the smoke seems dissapear or just a little bit and its hard to see (with normal mode i can see it clearly that smoke).

and when i punch the thortle with positif pitch it had a lot of power but when suddenly put negatif pitch suddenly it had wierd smoke pattern(like coughing)
and the engine rpm looks like bogging down (its like too rich)

i have tj pro enggage 1800 rpm while the thortle curve about 1700 rpm

what should i do?

please help

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12-08-2004 09:26 PM  12 years agoPost 17
hepsibar

rrApprentice

Perth WA

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Not sure if this will help but I have the 75P 5 nitro. This is how I have tuned mine so far. ( it is a new engine with less than a gallon through it)

I started hovering the heli with the main needle about 3 turns open and the left the lower needle as it was. It would just idle without quiting(rich) and would take a good few seconds to clear before take off. I had to richen the lower needle a little to ensure a rich run.

In the hover there was plenty of smoke.

I then went to idle up and found the head speed decay considerably due to the engine being too rich.

I tweaked the engine high end needle till there was good power and there was no difference or change in smoke trail between hover climb outs. The engine is still rich but happy and provides enough power for aerobatics providing I am frugal with the collective. As it runs in I will be leaning it off further.

I am running a hot plug enya 3 or max 7 and 16% bekra plus I add an extra 3% clotz for peace of mind. It seems to be a good combination.

Empty Coffee Cup

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