Mista Bonez - GWS EDF 50

[Aobid]

Does anyone know what the best way to attach the fan unit to the airframe? Any sort of twist and the fan rubs the shroud. I've lost about 1/32 off my fan due to rubbing on the shroud! Now I've got a nice little grove in there. I can't quite figure out how Dave attached that thing. Is there some sort of a wedge of balsa that accounts for the angel of the airfoil to keep the fan level? Any advice would be great.

Has anyone had a chance to fly their? I wonder if it will fly with the Ray-o-vac 9 volt NiMh.

I used some large foam plates to cut out the winglets and ailerons, I had to piece the aileron together, but it works!
Just didn't want to spend the extra bucks to order Zepron.

[Dave Robelen]

Hi Aobid,
I am sorry if the plan is not clear. There is a wedge shaped piece of 3/8" balsa between the fan and the wing. It is about 3/8" high at the inlet. I had good success with contact cement attaching my fan to the wood. I did make sure that the joint was opposite one of the vanes to cut down on the flexing. Apparently some, if not all of the rotors are out of balance a bit, and this leads to the rubbing. a firm mount for the shroud did help mine noticably. Good luck with the Ray-o-Vac, that sucker pulls over 3A, and that is quite a load for a small ni-mh battery. My cells are the Sanyo 120 mah ni-cds that were taken from the Sanyo N6-PT rechargeable 9V replacement battry.
Regards, dave

[Aobid]

That clears it up! The plans are great, maybe I was just looking too much into it. It looks like a great design, can't wait to fly it. Did you cover the servo bay or just leave it open?

So you think I should fly it with my 6 cell 150mah NiCds instead of the Ray-o-vac 9 volts?

What sort of performance should I expect with the 6 cell 150s? I guess the question is, how low and slow can I go with it? Inverted of course!:D

Would I be able to use this as a front street type flyer? I've been flying the GWS Cub and Moth with no problems, just land in the front yard or drive way. Don't know what speed range it will have.

Thanks again Dave for a great design!

[Dave Robelen]

Hi Aobid,
The 150 ni-cds should be the way to go. I have no problem cranking mine around snug quarters, The NBM flying made that clear to me. I actually prefer to land on asphalt or similar, it is less likely to rip the covering. The top speed is pretty zippy. Inverted no problem, but try it a bit higher the first time;) The main thing to adjust to is the rate of accelleration is less than that of a similar powered prop job. That 2" fan takes just a bit to get things stroking. Very jet-like, actually. If my neighbors pet is any example, you will get the undivided attention of any dogs nearby.
Cheers, dave

[CalmAir]

Hi Aobid,

Ordered my plans for "Mister Bones" last week. How long did it take you to receive yours?

Keep us posted on how it goes.

Regards,
Dale

[Aobid]

Hi Dale,

I don't yet have my plans, I ordered them a little over 3 weeks ago. I've been so anxious to get started that I just used The article from Backyard Flyer and enlarged the plans to get them to work for me, I hope I didn't break any copyright laws!:rolleyes:

That's why I had trouble making out the way the EDF was mounted. I expect about a month since that's how long it took for my Punkin II plans. I do think they say between 4 to 6 weeks if I'm not mistaken.

What do you plan on using for the Elevons and winglets? Do you plan on ordering foam? I used foam plates, won't know until I fly it if it's gonna work. What sort of gear are you using? I'll keep you updated on my status. I may put this guy on the back burner for a few weeks, I'm also flying my Ikarus Piccolo heli. That thing is a hoot, no time for relaxing with it......its a full time job flying it....tons of fun!

It doesn't take long to build Mr. Bones, about an hour to two to cut the wood out, another hour for building and about one to two to get the gear in there and cover it. I should have built two while I was at it since it would be easier double cutting right then. I want to build the other off the original plans to compare and see how off I was on things.

Regards,

Aobid

[CalmAir]

Hi Aobid,

Hey, I received my plans today. I ordered on-line and received them in 7 days. They look great and included the article. I have been reading the article in my magazine over and over, and studying the small plans.

Now I need to go balsa shopping and start stripping some wood! I have an aircraft with about 2 evenings worth of work left on it, then I will start working on Mr. Bones.

I am going to order the same foam that Dave used. As far as the radio gear, I'm not sure yet. I may use one of my JR setups.

I'll keep you posted, and let you know when I start the project. Probably get the wood tomarrow so it will be on hand.

Dale

[Steve/dave]

I built a mister bones just by looking at the small plan. I think it will work, but some how i got the wingspan at 23.2" instead of 24.2". I already ordered the edf, but i know I won't be able to fly it right away(too little stick time). I'll start with a pico stick, then transfer over the gws flight system to the delta wing. Question: The transmitter i have won't mix, is there a way to make a "sliding servo"(1st servo is hooked up aileron, 2nd servo slides the 1st back and forward) like gremlins use? Dave, how many mph does mister bones fly on GWS 7.2 volt,270mAh battery?

[CalmAir]

Hey Aobid,

Is your Mister Bones still on the back burner? I'm going to start on mine tonight. Too hot to do anything else, at least that is the excuse I'm using to get out of yard work.:D

I'll post it's progress under the photo section.

Dale

[Dave Robelen]

Hi Steve/Dave,
I have used a sliding servo mixer in other models with fine results. A couple of pieces of brass tubing on the sides of the aileron servo that slide on wire rails combined with a short pushrod from the elevator servo to the aileron servo do the trick. I would put the top speed with a 6 cell battery at around 25 mph.
Regards, Dave

[Steve/dave]

Hey Dave,
Would a v-tail mixer work? One of the intro pilot instructors said there are mixers that would do the trick. I think that all the brass tubing and wire weight would add up. Thanks for the suggestion though. I also think that the 7.2v 270Mah batt weighs too much. I might go down on mAh or 1 cell.

[Dave Robelen]

Hi Steve/Dave,
Something has slid through the cracks. I believe my reccomended battery was a 150 mah ni-cd. The 270 would be too heavy. You will need the 6 cells to get enough thrust from the fan. It has about 2/3 the push(pull) of a similar size drive with a prop. The other consideration is that the GWS EDF draws right around 3.0A while running, so too small a battery cannot hack it.
There are some onboard mixers on the market, but the wire and tube slider actually weighs less than a mixer with the plugs and cables involved. It may sound heavy, but the ones I have made really are decently light. Your choice though, really.
Regards, Dave

[Steve/dave]

Would this mixer weigh too much(5 grams)? heres the address: http://www.hobbypeople.net/gallery/128460.asp
Thanks

[Aobid]

Hi Dale,


Glad to see that you got the plans and about to start working on it. I've actually been sidetracked a bit, I picked up a Ikarus Piccolo electric heli and have been flying it. So I've put all other projects to the side for right now. Nothing against you Dave:D but this little jewel is loads of fun. I find myself hovering and flying this thing through the house and in the garage at late hours of the night. I think I'll pick back up on Mister Bones, she seems like a fun plane to fly. Plus, I ran my heli into the wall (ouch!) and will be out of service for a few days until the part arrives.

I'll keep an eye out for pictures.

Aobid

[Dave Robelen]

Hi Steve/Dave,
5 grams is no problem.
Regards, Dave