RE: Alfa Model Mig 15

RE: Alfa Model Mig 15
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RE: Alfa Model Mig 15 - 9/7/2004 3:41:50 AM

the Swamp Fox

Posts: 69
Joined: 12/12/2003
From: Wadmalaw Island, SC, USA
Status: offline

who makes the pack ?

I run the same motor as you with Tanic 3s1500's / 1550's

they weigh about 4-4.5 oz don't see your 1500's weighing much more than that.
plus you're less than an ounce over...

plane flies like a champ...

good luck

< Message edited by the Swamp Fox -- 9/7/2004 3:44:27 AM >

(in reply to zagimon)

Post #: 51

RE: Alfa Model Mig 15 - 9/7/2004 4:16:17 AM

zagimon

Posts: 26
Joined: 8/4/2004
From: plano, TX, USA
Status: offline

The pack is made by Kokam, also , what is the duration of your flights with your pack.

Thanks,

Fly Tough........

(in reply to the Swamp Fox)

Post #: 52

RE: Alfa Model Mig 15 - 9/7/2004 8:09:40 PM

the Swamp Fox

Posts: 69
Joined: 12/12/2003
From: Wadmalaw Island, SC, USA
Status: offline

3s1500 kokam is lighter than what I use...sometimes ALFA messes up the weights...I've emailed them about this in the past ...yer AUW is good to go.

I limit flights to 5-9 min..that's plenty for me ..

...because it's hot here now ,and there's not much in the way of motor cooling.

some guys drill holes in the motor mount and/or leave off the rear cone..mine is on ...so...

when it cools off and if the model survives I'll see what I get ...you can get away with longer flights with long ,power-off glides to cool the motor.

good luck!

(in reply to zagimon)

Post #: 53

RE: Alfa Model Mig 15 - 9/9/2004 3:11:00 AM

Mad Skill

Posts: 29
Joined: 5/30/2004
From: Lexington, KY, USA
Status: offline

I just bought one of these are there problems with the wing coming off.

(in reply to the Swamp Fox)

Post #: 54

RE: Alfa Model Mig 15 - 9/9/2004 7:20:37 AM

Paul Turbine Jet Man

Posts: 257
Joined: 2/26/2004
From: AdeiladeSouth Australia, AUSTRALIA
Status: offline

no. just make sure you use 5 min epoxy and remove the paint where the wing is attached. that is the main problem if you dont.
If you do remove paint from gluing surfaces and use epoxy you will be fine.

_____________________________

Dont buy it if you arn't going to fly it.

(in reply to Mad Skill)

Post #: 55

RE: Alfa Model Mig 15 - 9/9/2004 6:47:49 PM

xtremeRCpilot

Posts: 6
Joined: 9/3/2004
From: Lakewood, OH, USA
Status: offline

Hello,
Can anyone help me determine if my gross weight of 515 grams (18 oz. )will be a problem? I had to add 1 oz. of weight to the nose to get my CG correct. Even after moving my kokam 1500 lipo battery as far up as possible in the fusalage. This is my first jet propelled aircraft and though an avid flyer I don't want to destroy this fine plane during my first flight. Is there any good advice to the best possible take off method via hand or ground launch? Thank you for all your help!!
Safe Landings, JOHN

(in reply to Paul Turbine Jet Man)

Post #: 56

RE: Alfa Model Mig 15 - 9/11/2004 3:33:23 AM

zagimon

Posts: 26
Joined: 8/4/2004
From: plano, TX, USA
Status: offline

What motor are you using to make plane weigh that much? Also, My 25/25-26 was over heating after about a minute to 2 minutes of flight so deffinately drill alot of holes around motor for cooling because in 90 degree heat, you'll have heat issues. Now the plane fly's at full throttle for whole flight on 1320 and 1500 packs. Youll know if its over heating if motor cuts off and won't start up again till it cools off.

I love this plane though, its the best flying plane on the field. A real joy to fly. Be sure to give it a good throw on hand lauches and you'll be a happy camper.

Fly tough......

(in reply to xtremeRCpilot)

Post #: 57

RE: Alfa Model Mig 15 - 9/11/2004 1:54:23 PM

xtremeRCpilot

Posts: 6
Joined: 9/3/2004
From: Lakewood, OH, USA
Status: offline

I'm also using the 25/25-26. I was able to adjust the battery and eliminate another 1/2 oz of weight. There is also a 1 oz. weight difference from the kokam 1500 to the thunder power 1320 that Hobby Lobby recommends. I am wondering how you were able to safely bring your plane to the ground once you lost your motor. Is this jet capable of safe landings after a loss of thrust ? It seems very unstable as far as its CG is conserned. I cant wait to fly mine. I will try to get some vent holes around the motor as you suggested. Thank you very much for your reply.
Safe Landings, John

(in reply to zagimon)

Post #: 58

RE: Alfa Model Mig 15 - 9/11/2004 8:51:19 PM

zagimon

Posts: 26
Joined: 8/4/2004
From: plano, TX, USA
Status: offline

Ya , as long as you have some good altitude, you can safley bring her down. Just make sure and keep her high for the first few flights; as to test motor and flight components. even with the kokam 1500, she glides in smoothly and always bounches a few times when landing, making touch and goes easy. Just remember to give her a good toss on take-off.

Fly tough......

(in reply to xtremeRCpilot)

Post #: 59

RE: Alfa Model Mig 15 - 9/11/2004 11:33:08 PM

xtremeRCpilot

Posts: 6
Joined: 9/3/2004
From: Lakewood, OH, USA
Status: offline

THANK YOU AGAIN AND I WILL LET YOU KNOW HOW IT GOES ONCE I GET IT AIRBORN!! I REALLY APPRIECIATE THE GOOD ADVICE. IT SURE IS A BEAUTY. I HOPE TO GET SOME VIDEO OF IT IN THE AIR AS LONG AS MY MAIDEN FLIGHT IS SUCCESSFUL!!!
SAFE LANDINGS, JOHN

(in reply to zagimon)

Post #: 60

RE: Alfa Model Mig 15 - 9/12/2004 3:11:46 AM

the Swamp Fox

Posts: 69
Joined: 12/12/2003
From: Wadmalaw Island, SC, USA
Status: offline

good luck John,

No worries..this is one of the most stable ,easy flying planes of any kind I've ever flown.

Avoid ultra high G manuevers if possible,and draw those turns out.
couple of reasons:

1) you always want to have good airflow through the duct.It takes edf's a little longer to get on step. If you bleed off speed and enter a stall near/stall situation it takes longer to recover..sometimes too late.

2) you want to keep the wings on

give yourself plenty of room to land ,as the model will glide forever.
practice your approach a few times..it will land slow but you'll need to learn how to bleed off the speed...

hand launches are easy just make sure you build up speed and altitude before turning. (no torque effect from props on launch to worry about ...nice... )

RE: CG

I was able to get mine right with no weight by building a larger batt tray .My pack rides right where the duct turns up to the nose.Allowing just enough room for the hatch to close.. you do not want this one tail heavy

good luck all

< Message edited by the Swamp Fox -- 9/12/2004 3:12:43 AM >

(in reply to xtremeRCpilot)

Post #: 61

RE: Alfa Model Mig 15 - 9/12/2004 1:24:18 PM

xtremeRCpilot

Posts: 6
Joined: 9/3/2004
From: Lakewood, OH, USA
Status: offline

Thank you ! All this great advice is going to be helpfull toward my first flight. I will make sure to keep it high so I can test its soft points and still have time to recover as you suggest. Did you also have any problems with overheating and/or did you have to modify your motor casing. Seems there have been a handfull of Mig 15 customers that had there motors cut out? Definitly a good idea to put vent holes around the motor casing. If you get a chance check out Hobby Lobbys alfa model P-51 mustang. Its a great plane I've been having alot of fun with! Have you flown the Ta-183 Huckebein from alfa models, Looks like A fun jet as well with the brushless set up!!
Thank You again!!!
Safe Landings, John

(in reply to the Swamp Fox)

Post #: 62

RE: Alfa Model Mig 15 - 9/13/2004 9:26:26 AM

Woody 51

Posts: 1159
Joined: 6/21/2003
From: GeelongVictoria, AUSTRALIA
Status: offline

The TA 183 flies pretty well the same as the Mig 15 when set up with a 20-25/26 Mk2.

But be aware of its tendancy to stall and tumble without warning if you suddenly pull on full "up" elevator for a high alpha nose angle, while the model is travelling at high speed

(Typical "T" tail tendancy.)

_____________________________

A crash keeps one's opinion of one's flying ability, in perspective.

(in reply to xtremeRCpilot)

Post #: 63

RE: Alfa Model Mig 15 - 9/21/2004 2:28:47 AM

the Swamp Fox

Posts: 69
Joined: 12/12/2003
From: Wadmalaw Island, SC, USA
Status: offline

quote:

But be aware of its tendancy to stall and tumble without warning if you suddenly pull on full "up" elevator for a high alpha nose angle, while the model is travelling at high speed

Hmm..I've yet to see this with the MiG .Not saying it won't happen or it could be forced to do so.
Whenever I pull up hard you can watch the anhedral flex out and up she goes . same when rolling to invert and pushing up stick for a nice ,steep climb-out. If you don't come into that one with enough speed it will snap a little at the top,drop a wing and recover pretty easily as it begins to dive. The MiG V-stab / h-stab/elevator arrangement is quite different than the 183.

In any event, you maiden yet , John ?

G'luck all

(in reply to Woody 51)

Post #: 64

RE: Alfa Model Mig 15 - 9/21/2004 1:56:00 PM

xtremeRCpilot

Posts: 6
Joined: 9/3/2004
From: Lakewood, OH, USA
Status: offline

Hello All, still waiting to get the MIG up in flight! Just been having alot of fun with other aircraft recently purchased! We have a huge indoor sports dome where anyone with an AMA can fly there electric aircraft all winter. There is a gentelman from another local club that brings his mig and puts it to the test. Hopefully this is where I will take my maiden flight with trim help from this experienced pilot. My local park has alot of trees which makes me unsure of being able to get it trimed out fast enough and possibly crashing. I will take all your great advice and put it to use when I take my first EDF journey!!!
SAFE LANDINGS, JOHN

(in reply to the Swamp Fox)

Post #: 65