SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
Reply
Thread Tools
Old Feb 19, 2012, 06:21 PM
Registered User
Joe 1320's Avatar
United States, FL, Sebring
Joined Feb 2006
7,455 Posts
Quote:
Originally Posted by Kevin Greene View Post
I'm flying my MiG 15 on 4S....My ESC burned out after a couple of flights on 2S...I'm now running a 12 amp ESC and she really scoots on 4S...The stock motor can easily handle 4S with the stock fan rotor...Kevin
Which rotor? three or five blade?
Joe 1320 is offline Find More Posts by Joe 1320
Reply With Quote
Sign up now
to remove ads between posts
Old Feb 19, 2012, 06:51 PM
Registered User
Mendo's Avatar
United States, CA, Ukiah
Joined Dec 2011
793 Posts
I havent been in this thread for a while and have yet to do anything with my little f86, however reading the above few posts about the voltage and bec questions I thought I would toss my 2 cents in. For dropping the standard 5v most esc's put out to the 4.2 alot of the micro servos are limited I toss a IN4001 diode between the esc and rx. And for getting a bit more wiggle room out of the linear bec's they have as mentioned above just parallel a 2nd regulator right on top of the one on the esc. ( make sure its the correct regulator as they have a couple different ones ) and you will turn a .8 bec into roughly a 1.2a and the burst will go from 1.2 to about 1.6-1.8a. I have had no issues at all running 6 of the hk 5320 1.7 gram servos on plush or proton 6a escs with the .8a bec regulator doubled up, and Im confident it could run 8 of them just fine provided there are no glaring linkage issues dragging or binding them.

Hope this helps,
Mendo
Mendo is offline Find More Posts by Mendo
RCG Plus Member
Reply With Quote
Old Feb 20, 2012, 06:01 PM
Registered User
Australia
Joined Mar 2010
156 Posts
Quote:
Originally Posted by www.hobbyb.com View Post
F15 is coming
ARE YOU SERIOUS??? I just pulled the trigger on the mig-29, and think I'll have to get this when it comes out. Any word on the date this'll be in stock? Amazing!
android78 is offline Find More Posts by android78
Reply With Quote
Old Feb 20, 2012, 06:41 PM
Registered User
United States, TN, Jackson
Joined Mar 2007
4,019 Posts
Quote:
Originally Posted by Joe 1320 View Post
Which rotor? three or five blade?
5 blade..
Kevin Greene is offline Find More Posts by Kevin Greene
Reply With Quote
Old Feb 20, 2012, 08:11 PM
Registered User
Indianapolis, IN
Joined Oct 2010
1,864 Posts
Quote:
Originally Posted by gionir View Post
And it shouldn't! If she balances out without the lipo you've got a problem there.
After all you'll be flying WITH the battery so it makes sense that she's unbalanced without..
Yeah I understand that just surprised that it lifts the front wheel. Looking forward to flying her.
IndyMatt is offline Find More Posts by IndyMatt
Reply With Quote
Old Feb 20, 2012, 08:22 PM
The stalling italian
gionir's Avatar
France, RA, Lyon
Joined Jan 2011
297 Posts
Quote:
Originally Posted by IndyMatt View Post
Yeah I understand that just surprised that it lifts the front wheel. Looking forward to flying her.
Right, but if you think that the airframe is well under 100g, and the battery alone is around 35g it kind of makes sense that without the battery the plane is completely out of tune.
If then you are saying that that particular frame is an a$$, well I agree with you
gionir is offline Find More Posts by gionir
Reply With Quote
Old Feb 21, 2012, 12:19 AM
Mike
miketre's Avatar
Joined Dec 2010
749 Posts
IndyMatt,
That is perfectly normal. That is how mine is as well.
miketre is offline Find More Posts by miketre
Reply With Quote
Old Feb 21, 2012, 01:33 AM
www.hobbyb.com's Avatar
Canada, BC, Vancouver
Joined Feb 2012
73 Posts
Quote:
Originally Posted by android78 View Post
ARE YOU SERIOUS??? I just pulled the trigger on the mig-29, and think I'll have to get this when it comes out. Any word on the date this'll be in stock? Amazing!
Yes, as you can see from the sales flyer, it says "October 2011". I am sure it will be out very soon. Will let you know asap.
www.hobbyb.com is offline Find More Posts by www.hobbyb.com
Site Sponsor
Reply With Quote
Old Feb 21, 2012, 11:55 AM
Add Lightness
MNadMan's Avatar
United States, MN, Minneapolis
Joined Dec 2011
302 Posts
Quote:
Originally Posted by android78 View Post
ARE YOU SERIOUS??? I just pulled the trigger on the mig-29, and think I'll have to get this when it comes out. Any word on the date this'll be in stock? Amazing!
You'll really like that MiG-29! it's very smooth and stable flying. it can handle some wind, even unstable wind that makes flying my UMX Beast a chore.

Just make sure you add some UP thrust to the nozzles in the back, and max out your elevator throw. I maidened it stock thrust angle but with max elevator throw and there was so much down thrust I could barely keep it in the air with full up elevator. as I decreased the throttle it would climb.
I added in a good mount of up angle to both nozzles and it's PERFECT now at any throttle level from zero to full.

Good Luck!
MNadMan is offline Find More Posts by MNadMan
Reply With Quote
Old Feb 21, 2012, 01:24 PM
Registered User
Australia
Joined Mar 2010
156 Posts
Quote:
Originally Posted by MNadMan View Post
You'll really like that MiG-29! it's very smooth and stable flying. it can handle some wind, even unstable wind that makes flying my UMX Beast a chore.

Just make sure you add some UP thrust to the nozzles in the back, and max out your elevator throw. I maidened it stock thrust angle but with max elevator throw and there was so much down thrust I could barely keep it in the air with full up elevator. as I decreased the throttle it would climb.
I added in a good mount of up angle to both nozzles and it's PERFECT now at any throttle level from zero to full.

Good Luck!
Thanks. I've been eyeing it off for a while, but was so impressed by the stability in Brians video, I had to have it. Any chance you could show some pics beside a protector or take some measurements of how much angle you ended up settling on for the engines? Also, what battery and CG is this with?
Now for the waiting game... anyone have some good videos to keep me from going mad?
android78 is offline Find More Posts by android78
Reply With Quote
Old Feb 21, 2012, 04:10 PM
Add Lightness
MNadMan's Avatar
United States, MN, Minneapolis
Joined Dec 2011
302 Posts
I used a sky lipo (hobbypartz.com) 2s 500mah 20c - very close to the front of the tray. I'll take some photos.
I'll also take some photos of the thrust angle mods. I basically cut the glued edge on the bottom so the nozzles could angle up more. they leaves a gap between the fan cover and the nozzle, so I used some clear packaging tape to make a seal (kinda a 1/2 a thrust tube)

no idea on the angle. I just guessed and got lucky.

also my fans were mounted crooked with too much down thrust, especially the right side fan. I removed them and re-glued them in. but I think the nozzles helped more.

But I remember reading and see a video where people said they hand-launched it and it would just go into the ground. and that they needed a lot of up elevator trim. too much down thrust would cause it. cause once I corrected the down thrust, I set my elevators to dead center and it flew straight out of my hand with a gentle toss and only 2/3 throttle.

I could also tell it was too much down thrust because at 1/2 throttle I was holding full up elevator to maintain altitude, 1/3 throttle it would climb (still holding full up elevator) full throttle it would start to dive, cut the throttle and it would high alpha and float up. that's down thrust angle.
MNadMan is offline Find More Posts by MNadMan
Reply With Quote
Old Feb 21, 2012, 04:30 PM
Registered User
Australia
Joined Mar 2010
156 Posts
Quote:
Originally Posted by MNadMan View Post
I used a sky lipo (hobbypartz.com) 2s 500mah 20c - very close to the front of the tray. I'll take some photos.
I'll also take some photos of the thrust angle mods. I basically cut the glued edge on the bottom so the nozzles could angle up more. they leaves a gap between the fan cover and the nozzle, so I used some clear packaging tape to make a seal (kinda a 1/2 a thrust tube)

no idea on the angle. I just guessed and got lucky.

also my fans were mounted crooked with too much down thrust, especially the right side fan. I removed them and re-glued them in. but I think the nozzles helped more.
What you're saying makes sense with such a light plane that has small control surfaces and short fan ducts. Downward thrust could easily have as much effect as the elevators.
Would love to see the mods.

Quote:
Originally Posted by MNadMan View Post
But I remember reading and see a video where people said they hand-launched it and it would just go into the ground. and that they needed a lot of up elevator trim. too much down thrust would cause it. cause once I corrected the down thrust, I set my elevators to dead center and it flew straight out of my hand with a gentle toss and only 2/3 throttle.

I could also tell it was too much down thrust because at 1/2 throttle I was holding full up elevator to maintain altitude, 1/3 throttle it would climb (still holding full up elevator) full throttle it would start to dive, cut the throttle and it would high alpha and float up. that's down thrust angle.
The solution to this without modding... fly it upside down!
android78 is offline Find More Posts by android78
Reply With Quote
Old Feb 22, 2012, 01:22 AM
Registered User
Jacques.Eloff's Avatar
United Kingdom, England, Cobham
Joined Oct 2007
550 Posts
Quote:
Originally Posted by NitroCharged View Post
angelo - I use the dental casting rubbery stuff called alginate..smells like peppermint. You set up the original canopy in a little square container slightly larger and higher than the canopy. Make a stand-off so it(canopy) sits a little higher off the base. Pour in the Alginate and let it set (takes a minute). I let it sit there for a few more minutes and then peel it out of the container and sit it up side down to let it dry a little more. Then, mix super fine casting powder (plaster of Paris) into the alginate mold and you get a strong copy of your canopy. Use this to vac-form or shrink plastic over.
Nitro - any chance I can buy 2 Mig canopies from you? I could Paypal you the postage plus some extra $ for your effort. Name your price!

Jacques
Jacques.Eloff is offline Find More Posts by Jacques.Eloff
Reply With Quote
Old Feb 22, 2012, 04:39 AM
Team30 Micro EDF
NitroCharged's Avatar
Adelaide, Australia
Joined Apr 2004
11,243 Posts
Jacques, no probs - just cover the postage.

Here's the result of taking a mold and casting it.

NitroCharged is offline Find More Posts by NitroCharged
Last edited by NitroCharged; Feb 22, 2012 at 04:46 AM.
Reply With Quote
Old Feb 22, 2012, 11:44 AM
Registered User
Joe 1320's Avatar
United States, FL, Sebring
Joined Feb 2006
7,455 Posts
Quote:
Originally Posted by Jacques.Eloff View Post
Nitro - any chance I can buy 2 Mig canopies from you? I could Paypal you the postage plus some extra $ for your effort. Name your price!

Jacques
Quote:
Originally Posted by NitroCharged View Post
Jacques, no probs - just cover the postage.

Here's the result of taking a mold and casting it.


I could use a mig canopy too. Send me a PM if you're willing........

Joe 1320 is offline Find More Posts by Joe 1320
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Mini Mig-15 EDF from Hobby King Dreamcatcher Foamy EDFs 6 Jan 16, 2012 09:58 AM
New Product JPower/Banana Hobby 40mm Foam Mig-15 and F-86 ducted fan Mikemynameis Micro EDF Jets and Power Systems 557 Aug 18, 2011 05:01 PM
Build Log Hobby King Micro A-6 & F-86 Jets tallflyer Foamy EDFs 4 Jun 04, 2011 02:05 PM
New Product J-Power 30mm EDF Jets (F-86 & Mig-15) xplaneguy Foamy EDFs 1 Jan 16, 2011 05:59 AM
Park/indoor EDF F-86 and MiG-15 production news! Thomas B Parkflyers 8 Feb 06, 2002 06:30 PM