Question about Brisson 3.2 RPM
08-14-2003, 11:48 PM
#26
Question about Brisson 3.2 RPM
Brison says to use Synthetic right off the bat, think that may make it take forever to break in? Ill be running some normal oil until it makes some power I think, as its only got like 2 gal. through it. I just cant see it picking up that much power, but I sure hope it does.
08-14-2003, 11:58 PM
#27
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Question about Brisson 3.2 RPM
I ran one gallon of regular oil it just seem that one day the motor came alive but I was still happy with the power while it was breaking in as I prop it so that I still had unlimited vertical and I flew around at 1/2 throttle which is almost 3/4 of the rpm of the motor. Mine will still T-roll while it was breaking in as that lets you know you have the power there... 
now 323 flights later and counting....
now 323 flights later and counting....
08-15-2003, 04:41 PM
#30
Question about Brisson 3.2 RPM
OK, just got done running it again, I tried playing with the timing but found no RPM increase in the little adjustments I did so I put it back.
I reset the needles to what the book says, then ran it, only get about 6700-6750 on the 20x10 with this muffler
http://www.rcuniverse.com/attachment...postid=1228601
So, I tried that other muffler, man is it loud, my ears are ringing, but it picked up a bit of rpm. Right off the bat of starting it it hit 7100 but then slowed to a bit over 6900 and that is the best I can get out of it now. Here is the other loud muffler
http://www.rcuniverse.com/attachment...&postid=804404
what do you think? Just need more time?
I reset the needles to what the book says, then ran it, only get about 6700-6750 on the 20x10 with this muffler
http://www.rcuniverse.com/attachment...postid=1228601
So, I tried that other muffler, man is it loud, my ears are ringing, but it picked up a bit of rpm. Right off the bat of starting it it hit 7100 but then slowed to a bit over 6900 and that is the best I can get out of it now. Here is the other loud muffler
http://www.rcuniverse.com/attachment...&postid=804404
what do you think? Just need more time?
08-15-2003, 04:47 PM
#31
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Question about Brisson 3.2 RPM
JohnVH
I'm running the JA Peacekeeper Pitts
It is not nearly as loud as the ones Brison provides
I would suggest keep the one with the more rpms and continue the break-in. your getting closer at the 7000
I'm running the JA Peacekeeper Pitts
It is not nearly as loud as the ones Brison provides
I would suggest keep the one with the more rpms and continue the break-in. your getting closer at the 7000
08-15-2003, 04:55 PM
#32
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Question about Brisson 3.2 RPM
JohnVH
I ran the loud muffler for about a week waiting on my J and H peacekeeper to come hoping I could quiet that noisy plane down. I never did a comparison of rpm change, as I was just glad to get that noise off. We don't have any restrictions at the field I just needed that muffler to enjoy the plane. I DB 87 last week at the triple tree, with the 22 x 8 bambula and the peacekeeper, as I entered my 1st IMAC contest with the Edge.
I ran the loud muffler for about a week waiting on my J and H peacekeeper to come hoping I could quiet that noisy plane down. I never did a comparison of rpm change, as I was just glad to get that noise off. We don't have any restrictions at the field I just needed that muffler to enjoy the plane. I DB 87 last week at the triple tree, with the 22 x 8 bambula and the peacekeeper, as I entered my 1st IMAC contest with the Edge.
08-15-2003, 04:55 PM
#33
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Question about Brisson 3.2 RPM
this one is one a 3.2 brison on a Dave Patrick Extra
this motor has the v-stack taken off to say inside the cowl the above pic has the v-stack on there. i think i picked up about 200 rpm using the v-stack.
Once the motor breaks in more RPM can be had using a can set up
this motor has the v-stack taken off to say inside the cowl the above pic has the v-stack on there. i think i picked up about 200 rpm using the v-stack.
Once the motor breaks in more RPM can be had using a can set up
08-15-2003, 08:23 PM
#34
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Question about Brisson 3.2 RPM
HI GUYS, I have three Brisson engines; 4.8 twin, 3.2S & a new 2.4s. I am not too hung up over Max. RPM's. Brisson suggests we keep them in the 6500 to 7500 RPM range which I do. On my 3.2, I've used regular zingers at 22/10 and cut down to 21/10. I've also used a regular Menz 22/10. They all fly my 16 lb Lasor 2000 very well. But guess what? The prop that flew the plane best was a dinged up regular Zinger 24/8 (off my 4.8) cut down to 223/4/8. Go figure. My 3.2 is 5-6 years old with who knos how many hours. I really like the Brisson engines just in cae you didn't notice! Phil
08-15-2003, 08:46 PM
#36
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Question about Brisson 3.2 RPM
I am not hung on RPM's, but I would like to know what a good base is. This way if I go from 6000 to 5800 I can check to see if its a worn thing like time to rebuild so that i can investigate. I have found that props do make a difference, depending on what you are asking of the prop, i.e. 3d, down line braking, consistence speed, spool up time, spool down time, RPM at idle, ripping vs. non- ripping. When those factors come into play all props are not the same.
08-16-2003, 02:18 AM
#37
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Question about Brisson 3.2 RPM
I am running an MSC 20x10 on my 3.2 and get about 7200-7300 RPM. I fly at 5800' altitude so a lot of time my RPM figures don't mean much to you guys down at sea level. I'm going out tomorrow and try a 21x8 NX prop from Airwild to see if I can get a little more pull. I use Poulan synthetic oil with Chevron premium at 40:1.
Rein
Rein
08-16-2003, 01:34 PM
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Question about Brisson 3.2 RPM
Hi again! When I said I wasn't hung up over max Rpms, it was my way of saying how your plane flies and what you are trying to do with it should be the major issue. If it doesn't do what you want it to, then the investigation starts and includes everything fom plane design, rpms, fuel, props, carb tuning, and even unrealistic expectations! Regardless of make, 22/10's give me 6700 to 7200 rpm's at an altitude of 550' in the hot mostly low humidity of the AZ desert! Above all, have fun!!!! Phillip
08-16-2003, 03:43 PM
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Phillip Hatch
Originally posted by Phillip Hatch
The prop that flew the plane best was a dinged up regular Zinger 24/8 cut down to 223/4/8. Phil
The prop that flew the plane best was a dinged up regular Zinger 24/8 cut down to 223/4/8. Phil
08-17-2003, 01:40 AM
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Question about Brisson 3.2 RPM
Originally posted by JohnVH
Im having RPM issues with my Brison 3.2 also, I get 6100 or so with a ProZinger 22x10, and with a 3W 20x10 I get 6700. About 3 gallons through the engine, is this acceptable? It runs reliable, and smooth, but makes no power.
Im having RPM issues with my Brison 3.2 also, I get 6100 or so with a ProZinger 22x10, and with a 3W 20x10 I get 6700. About 3 gallons through the engine, is this acceptable? It runs reliable, and smooth, but makes no power.
08-18-2003, 12:36 AM
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Question about Brisson 3.2 RPM
My last word: I'm not too brilliant when it comes to computers.
I couldn't figure out any other ( what I thought was simple) way of saying what I did! Maybe 22-34"/8 is clearer. If not, I cut one and one quarter inches off the length and didn' mess with the pitch. Hope that clears it up. Phillip
I couldn't figure out any other ( what I thought was simple) way of saying what I did! Maybe 22-34"/8 is clearer. If not, I cut one and one quarter inches off the length and didn' mess with the pitch.
Hope that clears it up. Phillip
