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Search: Posts Made By: arnstein
Showing results 1 to 12 of 12
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Forum: RC Pattern Flying
06-03-2020, 12:04 PM
Replies: 45
Views: 12,686
Posted By arnstein

I have now done some mods to my installation,...

I have now done some mods to my installation, improved the cooling of the engine. Previously I had only foam around the cylinder/head down to the mounting lugs to get high air speed around the...
Forum: RC Pattern Flying
12-22-2019, 06:52 AM
Replies: 45
Views: 12,686
Posted By arnstein

Does the 185 Zero runs hotter than the 185 CDI...

Does the 185 Zero runs hotter than the 185 CDI due to the lack of Nitro in fuel?

My experience says yes, more attention needed to ensure high speed air past the engine.

And therefore the...
Forum: RC Pattern Flying
12-12-2018, 01:45 AM
Replies: 45
Views: 12,686
Posted By arnstein

The manual for the zero you may download from:...

The manual for the zero you may download from: 2262959

Anything on the outside of engine to confirm you know of?
I converted to the zero-version myself, replacing the piston only. So I do not...
Forum: RC Pattern Flying
10-14-2018, 01:42 AM
Replies: 45
Views: 12,686
Posted By arnstein

Having used the YS-Zero this season here is my...

Having used the YS-Zero this season here is my findings / thoughts:

· The engine produces max power on a very narrow needle range setting, compared with using fuel containing 20-30% nitro....
Forum: RC Pattern Flying
05-10-2018, 08:30 AM
Replies: 45
Views: 12,686
Posted By arnstein

I claim that the Zero is not more sensitive to...

I claim that the Zero is not more sensitive to temperature changes than the nitro version wrt pump adjustment. The pump adjustment and needle adjustment I have made is very minor and probably a mix...
Forum: RC Pattern Flying
05-10-2018, 06:59 AM
Replies: 45
Views: 12,686
Posted By arnstein

Yes, I have flown it several times with 0.8 bar...

Yes, I have flown it several times with 0.8 bar setting. Still fine tuning due to ambient temperature change for like 10C to 24C.
Wrt unit conversions have you tried e.g.:...
Forum: RC Pattern Flying
05-08-2018, 09:22 AM
Replies: 45
Views: 12,686
Posted By arnstein

Are you sure it is not 7-8 kPa per 1/8 turn? If...

Are you sure it is not 7-8 kPa per 1/8 turn? If that is the case everything makes sense.
YS 185 nitro: 1.1-1.2 bar @ idle.
For YS 185 Zero, YS suggest leaning the pump på 1/4-1/2 turn:
1/4 turn...
Forum: RC Pattern Flying
05-07-2018, 07:36 AM
Replies: 45
Views: 12,686
Posted By arnstein

I have measured the fuel pressure on the YS ZERO...

I have measured the fuel pressure on the YS ZERO and at idle I read 0.8 bar. YS recommended to lean the pump 1/4-1/2 turn, will that drop the pressure from 1.1/1.2 to 0.8?
Anybody measured the...
Forum: RC Pattern Flying
01-30-2018, 08:33 AM
Replies: 45
Views: 12,686
Posted By arnstein

I am not convinced that you reached the same...

I am not convinced that you reached the same conclusion if using 0% nitro. I guess you are running closer to 30%.

Arnstein
Forum: RC Pattern Flying
01-30-2018, 08:29 AM
Replies: 45
Views: 12,686
Posted By arnstein

An engine with a higher compresion will most...

An engine with a higher compresion will most likely need to run on a different ignition advance also I presume, is the ignition standard or "ZERO"? Just curious.

Not aware of any special ignition...
Forum: RC Pattern Flying
01-29-2018, 02:00 PM
Replies: 45
Views: 12,686
Posted By arnstein

Hi Scott, I have used different types of...

Hi Scott,

I have used different types of Hyde mounts. I modified one mount adding an extra layer of rubber, it improved the idling a little. However, the to get down to 2K, both the Hyde Evo...
Forum: RC Pattern Flying
01-27-2018, 07:49 AM
Replies: 45
Views: 12,686
Posted By arnstein

Ys dz185 zero

There has not been much information about the YS DZ185 ZERO engine, therefore I thought I should share my experience. The only difference to the nitro variant is the piston.

Initially the idle was...
Showing results 1 to 12 of 12


 
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