greyhound man

My Feedback: (5)

I have a moki 210 (dave patrick version) on a 16# edge and the engine runs fantastic but does not have pull out from a hover, Just curious if a tuned pipe might do the trick anyone have any experience with this engine and pipe, or are unsatisfied with their 210 and a bisson pitts "high volume " muffler.

JoeAirPort

My Feedback: (41)

Cutting the ends off the exhaust stacks can give you an additional 200-300 RPM. Use a Perry pump or regulator to make the engine run better. But 16# is a pretty heavy plane for the 2.10 to 3D. A gas engine would be better. Who's Edge do you have? I have the DPM Edge and Moki 2.10 and it flies pretty darn good at 15#. Hover is above half throttle, maybe less than 2/3. The engine is still breaking in so I am running it a little rich. What prop are you running?

greyhound man

My Feedback: (5)

I also have it on a dpm edge with a perrypump (tank on cg). It flies great and has ample power for most maneuvers except hovering it hovers at 3/4 throttlle with no reserve. Ive tried wood bolly 20/8, 20/10, 21/8, BME 22/8, bolly cf 20/8, and APC 22/8 so far the best seems to be the bolly 21/8


I talked to you about servo setups on this plane before, I replaced the 5245's with 5645's and setup as you suggusted, no problems since Thanks Chris

JoeAirPort

My Feedback: (41)

Mine hovers at about the same as you. I think this engine is just not as powerful as everyone expects. I could use more power myself. I would never hover in any strong wind since a bunch of reserve power is needed to bail out in those conditions (stall stall stall).

By the way are you sure about the 16# weight? That's another pound than mine and the setup is the same. Mine is on an accurate scale.

greyhound man

My Feedback: (5)

Yes its 16 pounds 2 ounces on a digital postal scale the only things i did different from stock were to build a tray under the wing tube for the tank and fuel proof the firewall. I guess i could have put some lightning holes in the tank tray but I dont think it will save me much weight.

JoeAirPort

My Feedback: (41)

Ok I just went to re-weigh mine and it's 15 lbs 3.5 ounces. I made the tray under the tube too. I used thick CA to fuel proof the firewall and Ultra coat to cover up all the lightening holes around the engine box. Regardless the Moki 2.10 is really not enough power for this ARF. I think a 40cc or 50cc gas motor would be better. It flies good but it should hover at half throttle or maybe 1/3 to be a good 3D machine. I posted a thread a week ago saying that my Moki 1.80 seems like it's either the same or maybe even little more powerful than the 2.10. Many people have made comments about the 2.10 to the same tune.

Cheech

My Feedback: (19)

Mine weighs 13lb 14oz on the MOKI 1.8. I pull-pulled the elevator halves and the rudder. I did nothing extraordinary to keep it light. The weight is accurate. Maybe it was time to get lucky. My Dave Patrick Extra came in at 16+ lbs. I got rid of it. My Edge is a keeper.

Power is fantastic. Pulls out of hover fine. Power WILL fade off durnig vertical snaps.

http://aeroplano.home.comcast.net/edge540/index.html

-Cheech

marc 540

My Feedback: (6)

Hi all. I also have a DP Edge with a moki 210 and a Bisson Pits muffler and it weighs 14 lbs. 12 oz. It hovers at about half throttle and pulls out slowly. It's not nearly as overpowered as I had hoped. Im using a master airscrew 20x10 at about 7100 rpm richened for flight. Do you think a 20x8 would give me better pullout? I have a Saito 220 and carbon fiber gear ordered. With these two mods. and going to one ele. servo on pull pull system I should be able to get down to 13 lbs 8 oz. ( 20 oz savings) The Saito should turn a 20x8 about 8000 rpm I would think. Do you guys think this would be a better setup? Thanks for your replies.

Marc

Cheech

My Feedback: (19)

The Saito sounds like a good mod. I personally think you are just running the wrong propeller. I use a Mejzlik 20x10 on my Moki 2.1 (H9 CAP) and it spins far better than an APC 20x10 or a Zinger 20x10 ever did.

-Cheech

JoeAirPort

My Feedback: (41)

I like using the light weight wood props like the Bambula 20x8. You will turn the same RPM as what you are getting on the MAS since the Bambula has big paddles. It's a great 3D prop, good pull and down line breaking. DP recommends an 8 pitch prop on these birds to keep the speed down. The CF props are heavier than the beech wood Bambula props.

greyhound man

My Feedback: (5)

For the money you would pay for a saito 220 about $550? or so add another $50 to that and youve got enough for a DA50. with this plane at 16# it would be ballistic. I'm considering a DA50 for mine, don't get me wrong I love my moki it runs great and has power enough for anything i want, except hovering it just doesnt have the power to pull out of a hover

JoeAirPort

My Feedback: (41)

I know what you mean, my friend maidened his GP Patty with a ZDZ 50 and it made my Moki 2.10 look weak. The verticals on the ZDZ were impressive.

marc 540

My Feedback: (6)

A DP Edge at 16 lbs?? No way would I want that. Lets not forget about wing loading guys.


Marc 540

Cheech

My Feedback: (19)

My DP Extra weighed in at a whopping 16# on a BME. It flew good, but I still got rid of it pretty fast. My DP Edge weighs in the high 13'# and flies fantastic.

-Cheech

JoeAirPort

My Feedback: (41)

Well we have a 14, 15 and 16 pound version of the same plane. So that tells you that DPM builds them with large variations in weight since we all have basically the same setup. This happens all the time from what I've seen in this forum.

Getting back to the original topic, the Moki 2.10 is no more powerful than the 1.80. I have both. The 1.80 spins a Bambula 18x8 at 8500 RPM. My 2.10 spins a Bambula 20x8 at 7000 RPM. That's 1500 less RPM! I bet if I put the 18x8 on the 2.10 it would barely spin it at 8500 RPM. I'm tempted to swap props and see. I'm not happy at all with the Moki 2.10. I expected much more from the engine. If you search this forum from corner to corner on the Moki 2.10 like I have, you will see that many people have complained about it's lack of power.

Cheech

My Feedback: (19)

My MOKI 2.1 on a H9 CAP is quite new. I am only into my third gallon. It now spins the Mejzlik 20x10 at 7100. During break in it was spinning a 20x8 Zinger in the high 6'sK. The 20x10 Zinger I was using while waiting for the Mejzlik spun at only 6700.

The CAP weighs in at 14lb 4oz. It has more power than my Moki 1.8 powered DP Edge. The 2.1 IS more powerful than my 1.8.

-Cheech







.

marc 540

My Feedback: (6)

My first Moki 2.1 was on a 12 lb. OMP 80'' Edge 540 profile. All I can say about that is WOW!! This plane would hover all day long at 1/4 throttle and pull out like a rocket at 1/2 throttle. full throttle was totally unesessary. Flew around level between 1/4 and 1/2 throttle. 1600 sq. inches of wing at 12 lbs is pretty awsome. ( I think I got spoiled with this combo.) If anybody get tired of the DP Edge put your Moki (1.8 or 2.1) on this plane and you will not be dissapointed !!!!! My Saito 220 will probably end up on one of these next season. I sold mine to fund another project but now I'm having regrets.

Marc 540

JoeAirPort

My Feedback: (41)

Now tell me what your 1.80 will turn with the same exact props? That's what I want to test out on my 1.80 and 2.10.

cu. in.

So far, nobody uses a Moki engine with a tuned pipe (???)

Bruce

marc 540

My Feedback: (6)

No tuned pipe for me thanks.

Marc 540

rwlewis

My Feedback: (4)

In Pattern, we use tuned pipes large 2-strokes all the time. Most common two strokes used in pattern are Webra 145's, OS 140RX's, OS160's, and 3M Mintor 140's & 170's. In our application, all out top end power is not the driving factor, our pipes are set just short enough to get some power boost at the top end, but long enough to allow good mid-range characteristics. The pipes have a divergent cone and then contant cross-section to the baffle, providing a milder tuning effect and great sound muffling. If you use a divergent/convergent cone pipe set for peak power, the mid-range suffers badly as the motor is either "on the pipe" or not. We are generally are running high pitched props (17x12, 17x13) in these setups.

I think it would be awesome to have a big Moki on a pipe. You would need to get with someone like Karl Mueller to have a custom header made ($40-$50). And you would need large volume pipe like the ES Composites 160 pipe...This would make a very light, very quiet, and very powerful setup...sounds like fun.

I've got a GP Wagstaff Extra that I've considered running a piped motor with the pipe inside the fuse exiting just behind the wing. It would take a little engineering to manage the heat, oil, etc...inside the fuse, but it would sound like an Indy car....[8D]

Richard

marzo91

My Feedback: (57)

I just bought a Mark 2.10 and a tuned pipe and header. I just started to break it in. It's turning a Bolly 20 x 8, 7800 RPM. I've only leaned it for a few seconds at a time, I'm still on the first gallon. When the pipe is optimal length, and it's broken in, I'm sure it'll top 8000 RPM richened for flight.

P.S. RWLEWIS, Yes it does sound lik an Indy car.

cu. in.

marzo91,

What make header and tuned pipe? I have a Moki 210 NIB and would like to try a tuned pipe on it.

Thanks,

Bruce

Julian537

My Feedback: (9)

My moki 2.10 is on a 1/4 scale Sig sukhoi SU-31. I barely have a half gallon of fuel through it. Running it on the rich side still. it spins a master airscrew "simitar" 20x8 prop at 7600. I just put a digital fish scale it and it was pulling 20.5 lbs. Since this plane weighs in at 11.5 lbs. I would think that it is going to have unlimited vertical and pull out of hover.
I cant say what exactly it does, I have not maidened it yet.

marzo91

My Feedback: (57)

Cu. in.,
I got the Mac's header and pipe from Morris when I got the engine. It was $110 for the set-up. It looks impressive and sounds awesome too.