az3d

My Feedback: (59)

I am soliciting opinions. I live in northern Arizona at 5200 ft. I have a Extreme Flight Yak with a DLE 111. I am using a mejzlik 28 x 10 prop that turns 6500rpm. The pull out power is good but I want more. As an example I used to fly a 33% sukoi with a BME 110 (tried the 116 and it was too much, I know it's hard to believe there is such a thing). I have considered the 120 but DA told me they tested it with the Yak with tune pipes. By the time I add the weight and price of tune pipes I might as well put a DA 150 on it. Has anyone done it? Does it fit? Opinions? Thanks.

bubbagates

My Feedback: (32)

I think a Da150 on that airframe would be way overkill, vibration would not be too much of an issue but have you considered ground clearance because now you are dealing with 32 inch props, larger fuel tank, weight beefing of the airframe overall and all those little items that have to go with the larger engine, Personally I'd go with the pipes as you will benefit from them like you would not believe as long as you match the header length to the pipe to help maintain throttle response and best power

I have a friend that has the DA100 on pipes in that plane and though it was a bit on the heavy side at 29lbs with his setup and penchant for 2 of everything for safety and A123 batteries, he used KS1060 pipes on 11 inch headers and a 25x12 three blade and the power was such that gravity was a passing fancy but this is at 400 to 1000 feet depending where we go for a contest

I'd love to see it fly though if you go with a 150, power should be unbelievable. If you could find another BME116 on cans or even pipes (OMG) now that would be the best of both worlds and then some.

show871

DA 120, power power power. Its an awesome combo

az3d

My Feedback: (59)

Its the altitude that is the issue. I use to fly in Phoenix at about 1200 ft. A DA 100 on stock mufflers would pull 35% planes out of a hover with authority. Up at 5200 it is a different story. I am thinking about running a 30 x 10 mejzlik on the 150. With the 28 x 10 on there now even when the plane is sitting level I have 6 inches of prop clearance so that should not be an issue.

az3d

My Feedback: (59)

My Yak with the DL 111 is 27 1/2 pounds. I figure with a DA 150 it should be about 30 pounds. Also where I fly noise is not an issue.

az3d

My Feedback: (59)

Not to sound cheap but did I mention a used DA 150 is 800 and a DA 120 is 1200 plus 500 for tuned pipes and headers = 1700.

bubbagates

My Feedback: (32)

A 30x10 prop is going to be too small for a DA150, even at your altitude. So if you decide to do this and you seem like that is the way you really want to go, I would go with a 30x12 on stock mufflers or a 32x10, the 12 pitch will give you more bite, which I would think that because of where you live you need.

Also, have you given any thought to just putting pipes on the DLE. That way you could remain light. If you are at 27.5lbs now, add another maybe 8 ounces just for the 150, another 8 to 10 ounces for the extra fuel, some more weight to beef the engine box up to handle the 150, not to mention anything directly connected to the engine box and you will be pushing 30lbs on stock mufflers. At that altitude the extra weight is going to increase your stall speed because of the thin air and once the stall happens, it is not going to be subtle. It's all things you need to think about.

I'm not saying it could not be done, but please remember you are going to probably be seriously pushing the limits of the airframe itself and these are very nice flying planes. If you make it happen then power is never going to be an issue. I wish I could get my 170 stuffed into a 30 to 32lb airframe, think about the possibilities of doing multiple vertical snaps on the way uphill and just flying right through them, not having to worry about energy loss [X(], let alone having my thumbs do dumb things to me while 6 inches off the deck and knowing all I have to do is hit the rudder and power and pull out of it

Bryant330L

My Feedback: (126)

You could consider the BME 150 if you want to put a 150 in it. It only weighs a few ounces more than a DA 100. Not as strong as the DA 150 but you will not need that much power anyway. I think the weight of a DA 150 would really hurt how well that plane flys.

JoeAirPort

My Feedback: (41)

I have one with a DA-120 on stock mufflers and the power is amazing. I too considered the DA-150 because when purchased used they are pretty affordable. A friend discouraged me because it's much like putting a DA-85 in the 88" Yak (a guy at his club did it and it kept shaking apart). With the DA-150 you could go with a 3 blade prop. I'd actually like to see you do this because nobody else has. You spark plugs might stick out the sides of the cowling.

Edit: I take that back, somebody has put an MVVS 152 in his. Crazy dudes in UK. Lee McCroy. They actually like their Yaks heavier because they always fly in lots of wind.

Barry Cazier

My Feedback: (17)

I have the 110" with a DA 100 on it with pipes. My all up weight is just a wisker shy of 30 lbs. I'm satisfied with the performance. Not overwhelmed, but satisfied. I get about 46lbs thrust. I'm still expermenting a bit with props. My best so far has been a VESS 27xB. That seems to work the best. I can pull out of a hover "snapally" and with kind of a "B" grade detective authority.
The plane flys great and I love the beast. I would expect the 120 on pipes would really be the cat's meow. I may even go to that this year. But overall I'm satisfied and don't really feel the need to change anything.
Another option you may think about....but pipes on your DL111. That would be the cheapest and would give you at least 3-4lbs more thrust.
Thanks
Barry

AndresAM

That,s the engine I will put on this plane. Check this video I found in youtube:

[link]http://www.youtube.com/watch?v=mi8bCJ8nEyg[/link]

There is also another one with a MVVS 152 that I couldn´t find. Very good setups

Andres

2robinhood

Yep,I would go with the DA-150.
This is the pull out that you are looking for.
110" EF Yak with DA-150

http://www.youtube.com/watch?v=JHf9I...eature=related

bubbagates

My Feedback: (32)

OK I admit, that last video link changed my mind about stuff a 150 in there

az3d

My Feedback: (59)

Bubbagates I think you are right. Im going to do it. What the hell, it will be fun if nothing else. I will have to watch the stall but really the weight will barely be over the designed weight with the DA 100 on tuned pipes. I will go with a 30 x 12 mejzlik. I will reinforce the firewall. I moved the rudder servo to the rear on a direct link already which should help the plane balance. It is very tail heavy now with the DLE on the front. The difference between the two engines cap to cap is 2 inches so 1 on each side. I should have about 1/4 inch to spare. Luckly the DA is 1 inch longer than the DLE but the DLE is on 1 inch standoffs so that will be perfect. When I had my BME 110 on the Hanger 9 sukhoi in Phoenix when I would pull out of a hover it looked like the engine was trying to pull the front end off the plane. That is the effect I want. With that kind of power you are right, the plane gets a little sideways and you just hit the power. Check out this video.

http://en.kendincos.net/video-rflvhj...-aircraft.html

bubbagates

My Feedback: (32)

Actually you really want the prop out about an inch from the cowl on any round cowl plane. I'm not sure of the exact reason but I here is has to do with prop efficiency. I do know that once I did that on my Yak, it did noticeably help so going out that extra inch is going to help with balance and thrust.

After seeing the videos I have a 150 in need of a home and I'm interested in how this is going to pan out

az3d

My Feedback: (59)

Bryant330L, The BME 150 would be a great option but I prefer DA's service.

az3d

My Feedback: (59)

Bubbagates, Why don't we trade my DA 100L for your 150 so we can speed this project up?

az3d

My Feedback: (59)

I have one a DA right now getting checked out before I sell it to fund the 150.

Eganwp

My Feedback: (1)

Don't go with pipes IMHO. I agree with your opinion on buying a bigger engine.

The DA-120 is a good option. But the BME-150 is a better one. It's specifcially designed for overpowering 35% (not 40% birds) and its weight is nearly exactly the same as the 100cc class engines. Not sure on the vibration of the lighter weight, but at least check into it.

Lately I'm in the same shoes as you... Want something overpowered on 35% for high altitude flying and have been checking out the 120 & 150. Good luck with your decision!



EDIT: I actually read the thread and realized the BME has been mentioned above as well. I'm really excited to hear your build/flight reports on the DA-150 if that's what you end up doing!

bubbagates

My Feedback: (32)

Normally I'd go with that option but I really have no use for the 100, sorry.

JoeAirPort

My Feedback: (41)

Wow this makes me wish I had gone the DA-150 route. Easily under a grand used. I didn't think the spark plug caps cleared but apparently they do. The only thing is mounting a rudder servo in the tail. Is this hard to do? Never did it.

krayzc-RCU

My Feedback: (31)

nice looks like you have started something here az3d [8D]

az3d

My Feedback: (59)

I already had the linkage so all I did was mark off where I wanted the servo, cut out the balsa and glue ply in behind it for strength. I found out the rudder is hollow so I cut open one side and cut part of a 1 inch by 12 inch hardwood stick to fit and glued it in place inside. Then I recovered it with balsa and ultracote. I then drilled the hole through it and tapped it for the control arm. I mounted my lipos, smartfly and receiver on top of the rudder tray. If I could figure out how to attach pictures I would.

az3d

My Feedback: (59)

Thanks for the posting pics pm. Hopefully this works.

krayzc-RCU

My Feedback: (31)

u r welcome everything is falling into place nicely[8D]