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RE: Larger Revolver - 2/2/2012 5:37 AM   
mach2


 

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ORIGINAL: MetallicaJunkie


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ORIGINAL: ICEM@N

By the way ...

I need a help ...

I have a Bisson Pitts Mufler at my OS 120 AX , so , Do i need to cut out the tips of the mufflers ou those little holes are dimmensioned ?



i personally would not cut the tips on the Bisson muffler... they are tapered in for a reason, to aid in giving back pressure,,,, i ruined a bisson pitts on my first 120ax, it would always bog going vertical.... i did get about 300 or so more rpm but it wasnt worth it


I cut the tip off of my stock DLE pipe so that my cowl will go on a lot easier. I didnt figure it would change anything since its a straight pipe, and I only cut less than 1/2" off.

But if something is tapered, then it is probably for a reason as you pointed out. Cutting it will open it up, which may reduce some needed back pressure....

however, my buddy is using some kind of pits muffler on on his MLD 35cc and it is killing his RPM. It must be too restrictive. He went back to the stock muffler. The pitts he was trying out has non-tapered pipes on it. But they were very small compared to the single pipe on the stock muffler.




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RE: Larger Revolver - 2/2/2012 6:01 AM   
mach2


 

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Jeremy,

Choke looks like it should work OK. I have my NGK plug capped at .025 and it seems to be working out good so far. I'll know for sure when I do the maiden. I am thinking about getting a Xoar prop for the maiden. I am affraid the Turnigy 17x6 is allowing the DLE-20 to rev up to high. I want it to slow down for landing. Our grass runnway is 600' long with trees at either end so I don't want to over shoot the runway


Thanks. It worked out fine. It was hard to get the geometry just right with my "custom" aluminum brackets I made. But a simple bend of the 2-56 all-thread made it work fine. and with the cowl on, all you see is the Ny-rod with the little screw for grip if you look straight into the cowl opening.

Our 600' asphalt runway is nice and long, but it can disappear very quickly. The grass will soak up speed nicely, enabling you to come in a little hotter without rolling out forever. But the grass is probably not as consistant as the hard surface.

I finally checked my CG with EVERYTHING in place and it turns out that my initial battery placement was right on the money. So im happy that I am able to use the mounting plate I put in for it. And it makes the inside appearance much nicer.

But knowing that the plane is naturally nose heavy, my idea of mounting the smoke pump on the botton of the firewall is outta the question. Maybe i can move my IBEC and mount it there, and put the 6oz oil tank just beind that. That shouldnt change the CG much at all.


She sits ready to fly at 9.8 pounds. The smoke system will ad 1.2 pounds later.....





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RE: Larger Revolver - 2/2/2012 6:19 AM   
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quote:

ORIGINAL: mach2


quote:

ORIGINAL: MetallicaJunkie


quote:

ORIGINAL: ICEM@N

By the way ...

I need a help ...

I have a Bisson Pitts Mufler at my OS 120 AX , so , Do i need to cut out the tips of the mufflers ou those little holes are dimmensioned ?



i personally would not cut the tips on the Bisson muffler... they are tapered in for a reason, to aid in giving back pressure,,,, i ruined a bisson pitts on my first 120ax, it would always bog going vertical.... i did get about 300 or so more rpm but it wasnt worth it


I cut the tip off of my stock DLE pipe so that my cowl will go on a lot easier. I didnt figure it would change anything since its a straight pipe, and I only cut less than 1/2'' off.

But if something is tapered, then it is probably for a reason as you pointed out. Cutting it will open it up, which may reduce some needed back pressure....

however, my buddy is using some kind of pits muffler on on his MLD 35cc and it is killing his RPM. It must be too restrictive. He went back to the stock muffler. The pitts he was trying out has non-tapered pipes on it. But they were very small compared to the single pipe on the stock muffler.




yeah cutting the exhaust pipe on most gassers wont effect the the engine like it can on a glow engine....infact i have cut off several inches on all my gassers... first its a PITA putting on cowls..... and 2 a long protruding exhaust tip can strike the ground if you happen to nose over possible causing more damage

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RE: Larger Revolver - 2/2/2012 4:04 PM   
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Status: offline 		Jeremy,

After looking at your pic's I think I will move my batties back to where you have yours mounted. Right now my CG is at 5 1/4" not the 5 1/2" the manual says. I bit that by moving the batteris back to just behind the rudder & elevator servo's the CG will be right on. I am picking up a Xoar 17x6 or 16x8 prop today if the LHS has one.

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RE: Larger Revolver - 2/3/2012 2:13 AM   
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Status: online 		If you have any chance of the landing gear giving out and putting the weight of the plane crashing on the pits muffler, you may want to do as I did. I cut the to pipes down to about 3/4" and extended them using the silicone exhaust extenders. It can save you the cost of a new $75 exhaust. As with many people on this thread, the gear will eventually give out, even if reinforced.

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RE: Larger Revolver - 2/3/2012 3:19 AM   
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Status: offline 		Well, If i hadn't reinforced the gear, i think i would have busted mine out of the fuse today.

I did the maiden today and my last landing i bounced quite a few times.

the video wasn't that great. The lighting wasn't good today, and i didnt do as much video as i had hoped because i was messing with the carb tuning. it was running good on the ground, but was rich in the air (which i thought would have been the opposite). I left the cowl off so that i could make faster adjustments because we were burning daylight. I was dialed in, then I put the cowl on, and that choked it some. I need to open the cowl some more, see how that works, then maybe need to lean it just a tad more. Hopefully not though.

Vid will be up soon...

Jeremy



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RE: Larger Revolver - 2/3/2012 3:23 AM   
mach2


 

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Status: offline 		Here it is.

I flies great. Remember, this is the first time I have flown ANYTHING other than my Thunder Tiger Trainer!  I think I did pretty well....what ya'll think?

Thanks,
Jeremy





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RE: Larger Revolver - 2/3/2012 12:52 PM   
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Status: offline 		Jeremy ,

Great Plane !!!

Great fly !!!

But I want to see the landing !!!


Ricardo

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RE: Larger Revolver - 2/3/2012 1:18 PM   
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Status: offline 		Looks great! Can't wait to get back out to the field and fly mine. Between weather and moving into a new house, the flying has been pretty non existant. I love the growl these have with the DLE 20 as they fly by. Mine is probably the loudest plane at the field, but everyone compliments it. Now I just have to do it justice by flying better. Good luck with yours and watch those landings if you have not reinforced the gear.

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RE: Larger Revolver - 2/3/2012 1:38 PM   
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Status: offline 		mach2 - Nice maiden! Plane looked great, DLE 20 sounded excellent. What prop were you using? Looked pretty quick. Would have liked to see your first landing... Keep up the good work! (btw - nice field - you people out West have LOTS of room!)

Mike

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RE: Larger Revolver - 2/3/2012 2:15 PM   
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Status: offline 		Jeremy,

Very nice first flight and the engine sounded great. I will have to wait another week for my maiden. I is going to rain all weekend long. I had to order a Xoar 17x6 prop and I moved my batteries behind the rudder and elevator servo's.

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RE: Larger Revolver - 2/3/2012 8:01 PM   
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ORIGINAL: ICEM@N

Jeremy ,

Great Plane !!!

Great fly !!!

But I want to see the landing !!!


Ricardo


HAHA. I will admit, since i had one good landing and one bad landing where I bounced about 7 times, I left it out because, of course, the bad one was the one caught on tape. In my defence though, it was idling real high because we put the cowl on and caused it to keep speed and wouldnt let it settle down. I will post it though if you'd like haha...

I cut  a lot more on my cowl last night so that the carb can get more air. And the plug inspection shows that it is indeed running rich. I also, cut a small hole in the top of the cowl so that I can make carb adjustments without a whole bunch of hassle of taking it on and off.....


Jeremy




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RE: Larger Revolver - 2/3/2012 8:42 PM   
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Status: offline 		the engine ran smooth with the cowl off ( you may or may have not noticed, but i spliced the videos together) and it sputtered from being rich with it on.

BTW, the winds were a stiff 6-10 left to right of the camera view....

afjetmech - It was plenty fast for my first flight (ive only flow the trainer with the GP .42 motor)  with the 16x6 Xoar, but i think the 17x6 would be better for recreational flying, and a 15x8 or 15x10 for showing off for your buddys. And like you said, show off the speed that the DLE's bark tells everyone that it has. When you hear this motor buzz by, you know its got some juice. And my gear are refinforced

Microdon - My first landing with the cowl off was good. The second one with the cowl on was bad (idling too high). AND the only one on video.....I WILL POST IT THOUGH HAHAHA. Im sorry. I'll show off my bouncy landing for ya'll.....

As for the field, It is a fullsize airstrip about 30 min. outta town where they have an RC Turbine Jet meet once or twice a year. Since it is a working airfield you are required to have communications. So I have a icomm transeiver so I can talk to any aircraft that come in to use the field.

Jstanton, the battery location balanced the plane nearly perfectly. No added weight needed. A total of 9.8 pounds = )
I wanted to go out again today, but the wind is outta control. Good thing I didnt wait to do my maiden today, I woulda be extremely disappointed.

I think im going to switch to rubber tires because my foamies are already getting kinda torn up.

OH, and just to let you know, i ended up putting more throw on the ailerons than the high rates, but with 38% expo to make it soft. It rolls real nice like that. The elevator is set at high rate throws with about 20% expo and the rudder between recommended low and high rates with 25% expo. Plenty of performance with a soft touch. More could be added for extreme maneuvers obviously, but im good for now.




< Message edited by mach2 -- 2/3/2012 10:43 PM >


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RE: Larger Revolver - 2/3/2012 9:05 PM   
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Status: offline 		Jeremy,

Glad to see your maiden flight was succesful. Don't wrry about the bouncy landings we all do it on our first 100 flight r so. Did you strengthen up the landing gear supports at all. After reading this forum I am a ittle worried about our grass runway terrin off the gear. I too have cut out a large area around the DLE so it can breath easier and it makes it easier to remove the cowl I also cut a small hole in the top of the cowl for adjust the carb





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RE: Larger Revolver - 2/3/2012 10:00 PM   
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Status: offline 		Jeremy
Nice maiden
As jstanton said, bouncy landings are common, and are often related to landing speed that is too fast. This plane will keep flying at a remarkably low airspeed. In my experience, the key to landing this extremely clean airframe well is a low idle. Consider using the idle-down feature on your radio, so that your in flight idle is reliable (~2400), but your landing idle is SLOW (~1700). With a higher pitched prop (10 or 12), even this low idle might not allow the airframe to slow below flying speed. In that case, spoilerons (not flaperons) might kill enough lift and add enough drag to let you settle her onto the runway (without inducing tip stall tendencies the way that flaperons can) without bounce.


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RE: Larger Revolver - 2/4/2012 1:26 AM   
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ORIGINAL: wjcalhoun

Jeremy
Nice maiden
As jstanton said, bouncy landings are common, and are often related to landing speed that is too fast. This plane will keep flying at a remarkably low airspeed. In my experience, the key to landing this extremely clean airframe well is a low idle. Consider using the idle-down feature on your radio, so that your in flight idle is reliable (~2400), but your landing idle is SLOW (~1700). With a higher pitched prop (10 or 12), even this low idle might not allow the airframe to slow below flying speed. In that case, spoilerons (not flaperons) might kill enough lift and add enough drag to let you settle her onto the runway (without inducing tip stall tendencies the way that flaperons can) without bounce.



And that's exactly what happened. It idled down great without the cowl, and landed great. With the cowl on, it didn't idle down and wanted to keep flying. I should have the "choking cowl" issue resolved. I opened up the bottom of the cowl A LOT and also put a small hole in the top so that I can make carb adjustments without the hassle of removing the cowl every time i need to make an adjustment.....

Im using a Y connector for the ailerons to keep an open channel for my smoker. i am using one channel to power the battery, but now that i know that I can still use the channel and power the reciever via a Y connector on that channel, I might look into removing the aileron Y and use independent channels for the ailerons and set up spoilerons.

THANKS!
Jeremy




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RE: Larger Revolver - 2/4/2012 1:30 AM   
mach2


 

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ORIGINAL: mach2


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ORIGINAL: wjcalhoun

Jeremy
Nice maiden
As jstanton said, bouncy landings are common, and are often related to landing speed that is too fast. This plane will keep flying at a remarkably low airspeed. In my experience, the key to landing this extremely clean airframe well is a low idle. Consider using the idle-down feature on your radio, so that your in flight idle is reliable (~2400), but your landing idle is SLOW (~1700). With a higher pitched prop (10 or 12), even this low idle might not allow the airframe to slow below flying speed. In that case, spoilerons (not flaperons) might kill enough lift and add enough drag to let you settle her onto the runway (without inducing tip stall tendencies the way that flaperons can) without bounce.



And that's exactly what happened. It idled down great without the cowl, and landed great. With the cowl on, it didn't idle down and wanted to keep flying. I should have the "choking cowl" issue resolved. I opened up the bottom of the cowl A LOT and also put a small hole in the top so that I can make carb adjustments without the hassle of removing the cowl every time i need to make an adjustment.....

Im using a Y connector for the ailerons to keep an open channel for my smoker. i am using one channel to power the battery, but now that i know that I can still use the channel and power the reciever via a Y connector on that channel, I might look into removing the aileron Y and use independent channels for the ailerons and set up spoilerons.

THANKS!
Jeremy






Opps, I didn't mean to quote myself.....can a mod delete this post?

thanks




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RE: Larger Revolver - 2/4/2012 1:36 AM   
mach2


 

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Jeremy,

Glad to see your maiden flight was succesful. Don't wrry about the bouncy landings we all do it on our first 100 flight r so. Did you strengthen up the landing gear supports at all. After reading this forum I am a ittle worried about our grass runway terrin off the gear. I too have cut out a large area around the DLE so it can breath easier and it makes it easier to remove the cowl I also cut a small hole in the top of the cowl for adjust the carb






Heck yeah. I did the gear when I installed them. And I think If i wouldnt have, I woulda ripped the bottom of the fuse out!

I think there is a trade off with grass vs. asphalt or concrete. The grass will give a load from the front, but will soak up shock, while a hard surface will cause more shock, but not cause the load from the front because there is less rolling resistance.....I think a nice "golf course green" type surface would be ideal.


Jeremy



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< Message edited by mach2 -- 2/4/2012 8:42 AM >


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RE: Larger Revolver - 2/4/2012 2:20 AM   
mach2


 

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Status: offline 		Okay everyone, here is my porpoise landing.

looking back on it....i should have just killed my ignition and it would have settled down.....

Ill get the motor running better and things should be good. It only has about one 420cc tank through it....



< Message edited by mach2 -- 2/4/2012 8:41 AM >


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RE: Larger Revolver - 2/4/2012 2:36 AM   
mach2


 

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Jeremy,

Glad to see your maiden flight was succesful. Don't wrry about the bouncy landings we all do it on our first 100 flight r so. Did you strengthen up the landing gear supports at all. After reading this forum I am a ittle worried about our grass runway terrin off the gear. I too have cut out a large area around the DLE so it can breath easier and it makes it easier to remove the cowl I also cut a small hole in the top of the cowl for adjust the carb






The larger opening is worth it, simply for the fact that I dont have to remove the plug wire everytime i wanna pull the cowl. Here is the bottom and top openings...



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RE: Larger Revolver - 2/4/2012 4:43 AM   
jstanton



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Status: offline 		Jeremy,


Your mods are looking real good. I really like that extra large opening around the DLE-20. I think I may enlarge mine also. Here are a few pics on some of the mods I did on mine. The Revolver now balances right at 5 1/2" Is that metal plate all that is needed to support the landing gears? I have install a APC 17x6 prop and try it while I am waiting for the Xoar 17x6 prop.

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RE: Larger Revolver - 2/4/2012 4:43 AM   
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quote:

ORIGINAL: jstanton

Jeremy,

Glad to see your maiden flight was succesful. Don't wrry about the bouncy landings we all do it on our first 100 flight r so. Did you strengthen up the landing gear supports at all. After reading this forum I am a ittle worried about our grass runway terrin off the gear. I too have cut out a large area around the DLE so it can breath easier and it makes it easier to remove the cowl I also cut a small hole in the top of the cowl for adjust the carb






Heck yeah. I did the gear when I installed them. And I think If i wouldnt have, I woulda ripped the bottom of the fuse out!

I think there is a trade off with grass vs, asphault or concrete. The grass will give a load from the front, but will soak up shock, while a hard surface will cause more shock, but not cause the load from the front because there is less rolling resistance.....I think a nice ''golf course green'' type surface would be ideal.


Jeremy



nice maiden..... very cool idea to trick the plane its a one piece gear

if you are having trouble slowing it down it may be slightly nose heavy..... with the 120ax i had to mount the elev servos in the tail, and the battery behind the fuel tank and it's still a bit nose heavy.... next time i take her out im going to move the battery behind the rudder servo....

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RE: Larger Revolver - 2/4/2012 8:51 AM   
mach2


 

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if you are having trouble slowing it down it may be slightly nose heavy..... with the 120ax i had to mount the elev servos in the tail, and the battery behind the fuel tank and it's still a bit nose heavy.... next time i take her out im going to move the battery behind the rudder servo....


It's  not nose heavy. The CG was just slightly aft of the recommended CG. I was having to mess with the carb tuning with and without the cowl. I'll get it dialed in though. It was just idling too high, which made it want to keep flying down the runway.

If you scroll up, you will see the cg posts.






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RE: Larger Revolver - 2/4/2012 8:54 AM   
mach2


 

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Jeremy,


Your mods are looking real good. I really like that extra large opening around the DLE-20. I think I may enlarge mine also. Here are a few pics on some of the mods I did on mine. The Revolver now balances right at 5 1/2" Is that metal plate all that is needed to support the landing gears? I have install a APC 17x6 prop and try it while I am waiting for the Xoar 17x6 prop.


My advise is to open it up. here are pics of my original opening...

all i did to the gear is to put an aluminum plate above and below the gear. Basically makining it one peice....





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70" Revolver, DLE20
67" Goldberg Edge 540, DLE20

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(in reply to jstanton)
       Post #: 4224

RE: Larger Revolver - 2/4/2012 2:09 PM   
wjcalhoun


 

Posts: 795
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Joined: 12/25/2008
Last Login: 5/17/2013
From: League City, TX, USA
Status: offline 		Jeremy
Even though the static CG is right on the recommended mark, the dynamic CG may still be nose-forward, as Metallica suggests, leading to a quicker landing speed. GP recommends a setup that is very conservative and 'safe'. Try flying the 1/2-3/4 throttle inverted 45* upline hands off, and see if she curls toward the horizon a little or none (good) or a lot (nose heavy) and make small adjustments to your CG from that info also.


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(in reply to mach2)
       Post #: 4225

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