Ys 185 dz
03-23-2014, 09:25 AM
#26
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I believe the Cosmos fuel was from the Japanese team and it was shipped late to Muncie. They gave it away to other flyers at the end of the week.. It was 10% oil content. I ran some of it with the OS-200 supercharged FI motors and mixed with Coolpower to get an acceptable oil content. Seemed to run well.
Ron Barr
Ron Barr
03-25-2014, 06:47 AM
#27
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I have a question about excess oil( seems to be mostly raw fuel) on the plane. Engine runs well but it seems to be coming out of the check valve on top but I have replaced it and still a problem. My current 1.75 is now doing it as well. Any ideas?
03-25-2014, 07:34 AM
#28
Hi Mike
Check your pump diaphram/gasket and the o-rings on the pump and head. Next , Then resurface the valve cover on a glass plate with 800 wet sand paper, to make sure it`s perfectly flat.
Depending on the engine version , the pump adjustment housing and the faceplate on the pump valve housing will have irregularities causing the diaphram to either get cut over time and leak, or the o-rings are not seated good in the head
Also inspect the hattari O-ring , make sure it`s an original Hattari. All others I`ve tried are not sized correctly and leak under pressure.
This is most likely the problem if both motors are doing it.
These are the most common leak problems.
Bryan
Check your pump diaphram/gasket and the o-rings on the pump and head. Next , Then resurface the valve cover on a glass plate with 800 wet sand paper, to make sure it`s perfectly flat.
Depending on the engine version , the pump adjustment housing and the faceplate on the pump valve housing will have irregularities causing the diaphram to either get cut over time and leak, or the o-rings are not seated good in the head
Also inspect the hattari O-ring , make sure it`s an original Hattari. All others I`ve tried are not sized correctly and leak under pressure.
This is most likely the problem if both motors are doing it.
These are the most common leak problems.
Bryan
03-25-2014, 08:18 AM
#30
Mike, I don`t have enough time on the 185 to make that comparison yet
But I think the good points so far are:
1The removal of the Pulse tube to the pump ( this gave fits to some with clearence issues and cut tubing causing lean up line runs)
2The fuel economy is better resulting in much cleaner runs when set correctly.
3The sound (tone is deeper and sweeter sounding under load)
4The bottom end Torque is improved ,and we can run up to 1" bigger diameter props reducing rpm and noise further.
5The weight is nearly the same
6Vibration is less
7The power jump is equal to the jump from the 160 to the 170 with the hyper pistons.
8 overall tuning is easier to set.
9 less smoke than the 175 ( all plays into fuel economy,and cleaner runs)
Although I must say the 175 has been the best 4 Stroke ever produced by YS as far as trouble free and maintenance SO far, I Think the 185 will be equal to that standard.and this motor is another Grand Slam!
Bryan
But I think the good points so far are:
1The removal of the Pulse tube to the pump ( this gave fits to some with clearence issues and cut tubing causing lean up line runs)
2The fuel economy is better resulting in much cleaner runs when set correctly.
3The sound (tone is deeper and sweeter sounding under load)
4The bottom end Torque is improved ,and we can run up to 1" bigger diameter props reducing rpm and noise further.
5The weight is nearly the same
6Vibration is less
7The power jump is equal to the jump from the 160 to the 170 with the hyper pistons.
8 overall tuning is easier to set.
9 less smoke than the 175 ( all plays into fuel economy,and cleaner runs)
Although I must say the 175 has been the best 4 Stroke ever produced by YS as far as trouble free and maintenance SO far, I Think the 185 will be equal to that standard.and this motor is another Grand Slam!
Bryan
04-02-2014, 04:36 PM
#36
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Test flown the 185 this morning, first flight with a 20.5 x 10 PN, about 7,000 on the ground with slightly rich setting. Changed to a 20 x 10.5 PN from the second flight on to put in more flight & break in time before switching back to the bigger prop. First impression, very effortless for up line & good, slow down line. After about a 9 minute flight on P-15 & a few F maneuvers, it still has slightly less than half a tank of fuel left on a 600cc tank. Since the whole morning was pretty calm, it will be interesting to see how much fuel it'll consume on a windy day. Will fly again tomorrow for more evaluation.
Adrian
Adrian
04-10-2014, 05:51 AM
#37
Senior Member
Test flown the 185 this morning, first flight with a 20.5 x 10 PN, about 7,000 on the ground with slightly rich setting. Changed to a 20 x 10.5 PN from the second flight on to put in more flight & break in time before switching back to the bigger prop. First impression, very effortless for up line & good, slow down line. After about a 9 minute flight on P-15 & a few F maneuvers, it still has slightly less than half a tank of fuel left on a 600cc tank. Since the whole morning was pretty calm, it will be interesting to see how much fuel it'll consume on a windy day. Will fly again tomorrow for more evaluation.
Adrian
Adrian
Adrian, I've been using the same prop on the OS GT33 gas engine. I get practically the same numbers as you indicate with the 33 also brand new.
It's a terrific prop except for its weight. 175 grams is a bunch. I made a wood carbon hybrid which weighs about 77 grams and similar in size.... 20 1/4"x12". I narrowed the blades 1/16" compared to the APC and thinned them compared to the APC, but otherwise the planform of the blades is identical to the APC. Paid very close attention to the trailing edge of the new prop, making is as sharp as the APC. The results are outstanding. Picked up rpm and the thrust from the 12 pitch is noticeable.
If you want to tackle the project, lets talk in private
04-11-2014, 07:59 PM
#39
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04-23-2014, 07:23 AM
#41
Guys
I spent the last few days tweaking my 185 and adjusting the needles.
I`m so impressed with this motor. The flight times are so good I can fly two p or f patterns and land with 2 ounces of fuel left in the tank, an 18.Oz tank. this is the Non CDI Version! it will get better once this thing breaks in and I can lean it some.
Running a 20.5-10 APC the power on the bottom is so good and smooth. the tone is sweeter and vibration reduced throught the whole throttle range. I had so much flight time on a gallon, I almost forgot to charge my on board pack ( kinda ruined my routine ) it confused me a little trying to figure out how I flew all day on a gallon. I lost track of how many patterns I flew. I had to go to a negative throttle curve to get the same power feel from the 175.
I love this motor more every time I run it.
It`s a Home run!
Bryan
I spent the last few days tweaking my 185 and adjusting the needles.
I`m so impressed with this motor. The flight times are so good I can fly two p or f patterns and land with 2 ounces of fuel left in the tank, an 18.Oz tank. this is the Non CDI Version! it will get better once this thing breaks in and I can lean it some.
Running a 20.5-10 APC the power on the bottom is so good and smooth. the tone is sweeter and vibration reduced throught the whole throttle range. I had so much flight time on a gallon, I almost forgot to charge my on board pack ( kinda ruined my routine ) it confused me a little trying to figure out how I flew all day on a gallon. I lost track of how many patterns I flew. I had to go to a negative throttle curve to get the same power feel from the 175.
I love this motor more every time I run it.
It`s a Home run!
Bryan
Last edited by flyncajun; 04-23-2014 at 08:01 AM.
04-23-2014, 07:37 PM
#42
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Guys
I spent the last few days tweaking my 185 and adjusting the needles.
I`m so impressed with this motor. The flight times are so good I can fly two p or f patterns and land with 2 ounces of fuel left in the tank, an 18.Oz tank. this is the Non CDI Version! it will get better once this thing breaks in and I can lean it some.
Running a 20.5-10 APC the power on the bottom is so good and smooth. the tone is sweeter and vibration reduced throught the whole throttle range. I had so much flight time on a gallon, I almost forgot to charge my on board pack ( kinda ruined my routine ) it confused me a little trying to figure out how I flew all day on a gallon. I lost track of how many patterns I flew. I had to go to a negative throttle curve to get the same power feel from the 175.
I love this motor more every time I run it.
It`s a Home run!
Bryan
I spent the last few days tweaking my 185 and adjusting the needles.
I`m so impressed with this motor. The flight times are so good I can fly two p or f patterns and land with 2 ounces of fuel left in the tank, an 18.Oz tank. this is the Non CDI Version! it will get better once this thing breaks in and I can lean it some.
Running a 20.5-10 APC the power on the bottom is so good and smooth. the tone is sweeter and vibration reduced throught the whole throttle range. I had so much flight time on a gallon, I almost forgot to charge my on board pack ( kinda ruined my routine ) it confused me a little trying to figure out how I flew all day on a gallon. I lost track of how many patterns I flew. I had to go to a negative throttle curve to get the same power feel from the 175.
I love this motor more every time I run it.
It`s a Home run!
Bryan
Just imagine how much better it would be with a 10 or 12oz tank... Fuel is heavy!
Cheers,
Jason.
04-23-2014, 09:11 PM
#43
Hi Jason
With the fuel on the cg you cannot tell any difference from full to empty !
I used to run a 12 oz tank in one of my valiants with the cdi and felt I was cheating myself, although the E guys loved it
Having the ability to fly back to back patterns in practice one P one F same conditions is a luxury and time savings you have to experience to appreciate !
With a 20oz tank ,I might get three patterns on a calm day Hummmm,,
Bryan
With the fuel on the cg you cannot tell any difference from full to empty !
I used to run a 12 oz tank in one of my valiants with the cdi and felt I was cheating myself, although the E guys loved it
Having the ability to fly back to back patterns in practice one P one F same conditions is a luxury and time savings you have to experience to appreciate !
With a 20oz tank ,I might get three patterns on a calm day Hummmm,,
Bryan
04-24-2014, 08:16 AM
#44
Senior Member
Hi Jason
With the fuel on the cg you cannot tell any difference from full to empty !
I used to run a 12 oz tank in one of my valiants with the cdi and felt I was cheating myself, although the E guys loved it
Having the ability to fly back to back patterns in practice one P one F same conditions is a luxury and time savings you have to experience to appreciate !
With a 20oz tank ,I might get three patterns on a calm day Hummmm,,
Bryan
With the fuel on the cg you cannot tell any difference from full to empty !
I used to run a 12 oz tank in one of my valiants with the cdi and felt I was cheating myself, although the E guys loved it
Having the ability to fly back to back patterns in practice one P one F same conditions is a luxury and time savings you have to experience to appreciate !
With a 20oz tank ,I might get three patterns on a calm day Hummmm,,
Bryan
04-24-2014, 02:59 PM
#45
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I was only speaking from a power to weight ratio. If one considers that 20oz of fuel weighs approximately 600 grams halving that amount does affect the vertical performance. It certainly did in my old Pinnacle with a 140RX. I did a lot of work lightening this model and it made significant difference at the top of a vertical. The YS would probably not suffer here but I can only presume that performance would benefit. Like towing a trailer behind the car.
A 20 minute flight is probably too much for me. Personally, I like to have a flight (8 min) and then review it in preparation for the next flight. It also gives other members a fair go at the flight line. ;-) Everyone to their own though so if it works for you and you have the field to yourself then do it.
Cheers,
Jason.
04-24-2014, 03:09 PM
#46
We have been flying for years two complete sequences on a single tank of 500 and 600cc, it is so good when after one sequence you can simply start all over again trying to improve the previous.
The 185 is without a doubt the best YS yet, and nothing compares in power and torque to this one yet, and we will see the real animal when the new prop from APC is out, wich should be any moment now.
The 185 is without a doubt the best YS yet, and nothing compares in power and torque to this one yet, and we will see the real animal when the new prop from APC is out, wich should be any moment now.
04-24-2014, 04:06 PM
#47
We have been flying for years two complete sequences on a single tank of 500 and 600cc, it is so good when after one sequence you can simply start all over again trying to improve the previous.
The 185 is without a doubt the best YS yet, and nothing compares in power and torque to this one yet, and we will see the real animal when the new prop from APC is out, wich should be any moment now.
The 185 is without a doubt the best YS yet, and nothing compares in power and torque to this one yet, and we will see the real animal when the new prop from APC is out, wich should be any moment now.
If the new prop pulls that back to around 7100 it will be much better. Make more use of the huge amount of torque these engines have.
When someone knows they are released, maybe they can post here.
04-24-2014, 07:29 PM
#49
Senior Member
Hi Matt,
I was only speaking from a power to weight ratio. If one considers that 20oz of fuel weighs approximately 600 grams halving that amount does affect the vertical performance. It certainly did in my old Pinnacle with a 140RX. I did a lot of work lightening this model and it made significant difference at the top of a vertical. The YS would probably not suffer here but I can only presume that performance would benefit. Like towing a trailer behind the car.
A 20 minute flight is probably too much for me. Personally, I like to have a flight (8 min) and then review it in preparation for the next flight. It also gives other members a fair go at the flight line. ;-) Everyone to their own though so if it works for you and you have the field to yourself then do it.
Cheers,
Jason.
I was only speaking from a power to weight ratio. If one considers that 20oz of fuel weighs approximately 600 grams halving that amount does affect the vertical performance. It certainly did in my old Pinnacle with a 140RX. I did a lot of work lightening this model and it made significant difference at the top of a vertical. The YS would probably not suffer here but I can only presume that performance would benefit. Like towing a trailer behind the car.
A 20 minute flight is probably too much for me. Personally, I like to have a flight (8 min) and then review it in preparation for the next flight. It also gives other members a fair go at the flight line. ;-) Everyone to their own though so if it works for you and you have the field to yourself then do it.
Cheers,
Jason.
The OS GT33 piped 2 stroke gassie puts out similar power to the YS175; a little better top end for the same props but slightly lesser brakes at idle. Very similar mid range tork. The YS185 based on Bryan's and Adrian's reports is at a different, higher level. I'm all for that....but not about to change my gassies....
04-24-2014, 07:42 PM
#50
Senior Member
One of the better props I've made for my GT33 is a 20 1/4 x 12. The engine loves that prop and it is very similar to an APC blade shape. APC's are the best in design.