Ron101

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I'm sure you did.. but did you rough up the metal joiner?
I used 80 grit and rough it up real good... then clean with denatured alcohol
don't give up on the mig ... my second one is better than the first

tom_eutsler

My Feedback: (2)

Howdee, I've got one on order from HL , found this Forum very helpful with what to do / not do
Much Obliged to all the informative postings Tom E in Asheville

evan-RCU

How are you routing your antenna? The instructions say not to route it through the fuselage but the two I've seen did...

odanield

I ran mine through the fuselage close to the receiver. I ran the antenna down the lower side of the fuselage with clear tape. Looks good. Lasts a long time. I have had no problems with this installation.
Dale

evan-RCU

Okay a friend is building a Mig and it's coming out VERY tail heavy, anyone else have this problem?

Ron101

My Feedback: (22)

not to insult you..
but are you checking the CG with the battery in it?
it should be really close with the batt. in it... I did have to add a 1/2 ounce

thanks
Ronnie

evan-RCU

You're not insulting me because it's my friend that's doing it, but yes he has the battery as far forward and in the plane as it will go. After reading a lot of posts on the competing web site, RC(X), it turns out that with a light battery like he has, a 1200mA 20C norm discharge called Twenty from Hobby Lobby that weighs 3.6oz most people had problems with tail heaviness. If you use a 4-4.5oz pack like a 2200 people got good balance. a 1/2oz to me is a lot for a 16oz plane. Thanks for the input!

Ron101

My Feedback: (22)

your dead on..
I have a 2220 pack... so that explains it
I wasn't to happy with the added weight.. but I built two and that what they both took to balance...
the first one I added no noseweight on the maiden and it shot straight up..
I was lucky to get it to the ground in one piece... after I added the weight it flew great..

Ronnie

Digs9101

Hi guys, I built my wing as some of the others have suggested. I noticed that there seems to be some anhedral (negative dihedral) to the wing. Is this normal? I followed others suggestion... setting the wing incidence with the leading edge in the center of the moulded wing seat and the trailing edge at the upermost of the moulded seat.

Thanks for everyone's hints and advice. It is a big help as the directions leave a lot to interpretation.

Brian

tom_eutsler

My Feedback: (2)

Mine did for sure, used CF tubes down the inside of wing - slid them on the metal joiner and probably dribbled ? toooo much epoxy down the CF tubes without servo battery or anything inside cockpit, it took 133 Gms of lead solder in the nose , to bring the CG bit nose heavy
tom e

sukhoidave

So bud, How'd that model work out?

Digs9101

[/quote]

So bud, How'd that model work out?

[/quote]
As you well know, this plane is a blast to fly. I could not be happier with it. I got 3 great flights in on Thursday.

I had heard that some of the models were coming up tail heavy, so I moved the esc and receiver as far up in the nose as I could. Some people are using a heavier battery to help get the CG right, but I'm using the very light TP 1320 and didn't have an issue getting the CG right on. Even had room to move the battery further up if need be.

I set the wing incidence with the leading edge in the center of the moulded wing seat and the trailing edge at the upermost of the moulded seat. For the tail, I pretty much followed the moulded seat, with maybe the leading edge just slighty above, but not very much at all. The maiden didn't need much trim at all, so this worked out well for me.

Can't wait to get my Mig back in the air, hopefully the weather will cooperate this weekend.

Safe landings,
Brian

mystar46

I have about about 8 flights on mine now. I bought everything that Hobby Lobby recommends. I used a JR micro flight pack with my 10x transmitter. I use the Twenty battery all the way forward and mine balances perfectly with no added weight. My all up ready to fly weight is 15.5 ounces.
I got a flight in today on it and we clocked it at 52 MPH with a radar gun. Not bad for a plane that light and small.
It's a real crowd pleaser at the field and flies like it's on rails.

tom_eutsler

My Feedback: (2)

Anyone know what size , those 3 nylon bolts are ? that hold the Fuse to tail section? Thought I better go over mine this PM , before going to field - the two top nylon seemed a bit loose when i tried to snug em up - Hmmm so took it apart , to put some CA in the wood - to harden it up , after drying, ran the bold/screw back in and out - seemed OK , til I put it back togeather and found the nylon were just turning freely in the wooden bulk head -will have to plug the holes and re-tap them out ....te

bookboy22

Hi Ron,

I'm ready to purchase the Alfa Mig-15, and have some questions. I'm going with the Himax 2025-5300 motor.

1) What fan are you using, the Vasa55, alfa fan gen 1, or alfa fan gen 2?
2) Is the Tanic 2200 your using a 2cell or a 3cell? The Tanic website on shows a 26.4 Amp (nominal) 2220mah 7.4 volt pack 2cell. The Thunder Power 2100's come in either 2100mAh 2-Cell 7.4V LIPO,16GA THP21002SPL or 2100mAh 3-Cell 11.1V LIPO,16GA THP21003SPL
3) Why did you go with the Tanic pack over the TP?
4) What ESC are you using?
5) What RX are you using? Can I use something like the Hitec 05S Flight Pack, as I need the servos also.

Thanks

Ron101

My Feedback: (22)

Hey BookBoy,
I went with the tanic 3c 2220 packs because I bought my whole setup from http://e-flightline.com/
I have four of the packs and they work great. I'm using the stock fan settup... but balance the nose cone and do the mods from andys web site to the fan for cooling .. don't run the tail cone
Here is a link to his great build thread http://astro.umsystem.edu/andy/rc/mig15/
Himax 2025-5300's, phoenix 25 (2) pico servos (use with 3s Tanis 2220)
I called him many times and it is a typo where it says to use a 1550
I'm using a hi tec 555
very fun and fast.. it's so small it look like it's going 200 mph
I have better luck taking off of grass than hand launching
great little plane!!

bookboy22

Thanks for the info Ron,

Here is the setup I'm going with:

Himax 2025 5300
Castle Creations Phoenix-25 ESC
Thunder Power 2100 Prolite series 3s LiPo
Hitec Micro 05S flight pack (Micro 05S - 5 Ch Single Conversion Receiver 8.6g) (3 HS-55 Micro Servos) I'm planning on using Andy's dual the aileron servo setup
Gen 2 Alpa fan - I think this is stock now with the Alpha Mig-15 kit
Do all the cooling and reinforcement mods, with a new red paint job

This Mig15 is going to be a red rocket.

Check out this new Kondor Model Products F/A 18. The setup in the video is totally under powered. The EDF's sound like crap. I'm not sure how sturdy the foam kit is. Very cool size though. Landing gear would probally rip off on ruff landings. It would also be quite expensive to power this baby for top performance.
http://www.kmp.ca/product_info.php?c...3affe891958c9a

Ron101

My Feedback: (22)

No Problem BookBoy,
You know I"m a little worried about the RX choice.. I'd check around abit
but most guys I know are using the smaller micro 05s hitec on park flyers
this plane is by know means a park flyer ...unless it's one big park
it covers alot of space... I use as much space as a 40 size gas plane with the mig
I'd just make sure that it's up to the job

I think I'd go with http://www2.towerhobbies.com/cgi-bin...?&I=LXCXN0&P=0
I see they dont make the 555 any more .. so it looks like the MG04 took it's place

make sure to balance the nose cone... it's easy to do
set it nose down on the table .. add a little thick CA to the light side
once it is balanced it will stand on it's own

I would also not hand launch on maiden... I've built two and they want to go straight up if you don't toss them just right...
most of the time it's fine ... but I've had a few close calls... be ready to go to down elevator

have fun.. I love mine

bookboy22

Hey Ron,

It's funny you picked up on that RX choice of mine. I just got back from my LHS, and they suggested that I go with the Castle Creations Berg 4L RX instead of the Hitec 05S. The Hitec 05S does say 1+ miles range though. Anyway I'm going with the Berg 4L and three Hitec 55 servos. They were also saying that some of their customers have been having problems with Thunder Power LiPo's. Different issues like swelling and not holding charges. They were suggesting the 6.2oz Polyquest 2100 mAh PQ21003 LiPo pack. They also said that I shouldn't get the battery right now as LiPo prices will go down, and that I should make sure about the best size fit for the Mig battery comparment.

Has anyone played around with the Castle Creations Phoenix 25 programming? I guess it really depends on the motor and battery your using. The manual looks pretty straight forward. I think I'll just program it through the radio, and forget about purchasing the USB cable for the PC link.

That e-flightline company http://e-flightline.com/ has a great deal on the Mig package I wanted. You just saved me $100. Forget about my LHS

Thanks

Ron101

My Feedback: (22)

Glad to hear .. they saved you a few bucks
As far as Castle Creations Phoenix 25 programming... it doesn't need a thing... just plug it in and your set
I'd just buy your batt. threw e-flightline .. they can tell you what wil fit good... my tanics (3c 2220) fit perfect
9 minutes flat out... nice thing is they also fit well in my stryker
you can build they mig in about three nights after work
make sure you check the CG well
good luck!
let me know if you need any help

bookboy22

After reading through all the threads on RCU and RCgroups, it sounds like Alpha company has since 2004 thickened the foam on the fuselage and upgraded the EDF unit. Did you do any glass cloth strengthening on the inner sides of the fuselage to keep her from stressing and cracking? That thread on RCgroups got a little nasty in the end. It sounds like the Himax 2025 5300 and a 3s 2100-2500mah LiPo pack is the top performance setup. Have you heard of any other setups that were more powerfull without burning her up. Obviously throttle management must be done or stress and overheating will occur. What is your average flight like, and is your engine/ESC getting super hot durning runs.

Thanks

whissel_blowa

Alot of the amp draw and heat from the Alfa fan has to do with the rotor being non concentric with the stock hub adaptor. I picked up 2000rpm ancd dropped 2.5 amps be replacing the hub adaptor with a custom machined clamp on one which slides into the back of the rotor snugly.

Another great choice of power is the Hyperion 5000Kv short motor, 17 amps, 10.5 volts, 47500rpm on the series II Alfa fan. Can fly this WOT the whole pack if you want

Ron101

My Feedback: (22)

I fly mine WOT no problem ... I fly three packs back to back.. with maybe 5 minutes in between no prob..
both the one I built are the newer version... I did add alittle glass to the inside of the fuse just where the wing joins and where the spar crosses the airduct...

bookboy22

Hey Ron,

I think I missed one of the mods, and that was to place the ESC in the exhaust tube for cooling. Did you do this mod? The thread guys are know working on the Me-262 kit and one of the guys said 'The Alfa fan with the Himax 5300 has worked well in the Mig15 and F86, with the ESC in the exhaust tube for cooling'

Thanks

Ron101

My Feedback: (22)

I don't have my ESC in the exhuast tube...
mine is in the fuselage ... it doesn't give me any problems..
I think some of the mods are over kill... like the carbon fiber rods.. it's doesn't need it
but to each there own