RC Jets Discuss RC jets in this forum plus rc turbines and ducted fan power systems

Mig 15 With Jetcat P20 Build Thread

Reply
Old 06-21-2011, 07:44 PM
  #101
rastus21
 
Join Date: Jan 2004
Location: Alice Springs, AUSTRALIA
Posts: 143
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

Nice one bro, she looks the goods. After I seen ya post that HK had the red one in stock I also immediatly ordered one. Mine will be EDF, 8s set up approx 3.3 kw.

Got my first turbine waiting for me when I get home from the Sim, exciting times.

Matt
rastus21 is offline  
Reply With Quote
Old 06-22-2011, 03:18 AM
  #102
bigplumbs
Thread Starter
 
Join Date: Jul 2004
Location: England, , UNITED KINGDOM
Posts: 2,725
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread


Quote:
ORIGINAL: rastus21

Nice one bro, she looks the goods. After I seen ya post that HK had the red one in stock I also immediatly ordered one. Mine will be EDF, 8s set up approx 3.3 kw.

Got my first turbine waiting for me when I get home from the Sim, exciting times.

Matt
It will be a squeeze getting 2 4 cell packs in her as the ducting is so big. You might be better upping the KV of the motor/Fan and going 6 cells. Wait till you get it and you will see what I mean

Dennis
bigplumbs is offline  
Reply With Quote
Old 06-22-2011, 03:24 AM
  #103
bigplumbs
Thread Starter
 
Join Date: Jul 2004
Location: England, , UNITED KINGDOM
Posts: 2,725
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

Thrust Pipe

The thrust pipe I am using is the one I got with my Habu 32 kit in the sports kit. It is just the right length. You have to fix the belmouth on however and fix on some front mounting pieces. I used offcuts from an old pipe I had. The Habu 32 sports kit comes with a rear mounting metal and outer wooden ring and screws and I used this to mount the pipe at the rear by the bulkhead next to the rear bottom Hatch.

This whole job was a bit of a pain and took me about 2.5 hours. I always hate mounting thrust pipes. It has finished up very solid though and I have managed to add very little weight.

At the top mounting you will see I have had to drill a hole in the rear of the canopy to clear the bolt head

Dennis
Attached Thumbnails
Click image for larger version

Name:	Vs55695.jpg
Views:	61
Size:	83.2 KB
ID:	1626213   Click image for larger version

Name:	Rn39573.jpg
Views:	52
Size:	76.2 KB
ID:	1626214   Click image for larger version

Name:	Bg93525.jpg
Views:	61
Size:	66.9 KB
ID:	1626215   Click image for larger version

Name:	Lf95444.jpg
Views:	50
Size:	94.5 KB
ID:	1626216   Click image for larger version

Name:	It99947.jpg
Views:	67
Size:	79.5 KB
ID:	1626217  

Click image for larger version

Name:	Aq98506.jpg
Views:	53
Size:	85.8 KB
ID:	1626218   Click image for larger version

Name:	Pn35920.jpg
Views:	63
Size:	69.4 KB
ID:	1626219   Click image for larger version

Name:	Rm37222.jpg
Views:	74
Size:	75.9 KB
ID:	1626220   Click image for larger version

Name:	Ec89336.jpg
Views:	68
Size:	79.1 KB
ID:	1626221  
bigplumbs is offline  
Reply With Quote
Old 06-22-2011, 03:33 AM
  #104
bigplumbs
Thread Starter
 
Join Date: Jul 2004
Location: England, , UNITED KINGDOM
Posts: 2,725
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

Hey Dave the midget............. Havn't you got any work to do I can see You

Dennis
bigplumbs is offline  
Reply With Quote
Old 06-22-2011, 03:44 AM
  #105
bigplumbs
Thread Starter
 
Join Date: Jul 2004
Location: England, , UNITED KINGDOM
Posts: 2,725
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

Rear Hatch

The rear bottom hatch is held in place by 4 preapplied magnets. Mine was quite a poor fit as can be seen in the pics below. All I did was push on it to splay it out and stuck it with selotape front and back. You should always have a dit of selotape on all planes I recon.................Oh and an elastic band


Dennis
Attached Thumbnails
Click image for larger version

Name:	Om32999.jpg
Views:	26
Size:	79.2 KB
ID:	1626232   Click image for larger version

Name:	Kf12657.jpg
Views:	26
Size:	62.2 KB
ID:	1626233   Click image for larger version

Name:	Ot47752.jpg
Views:	30
Size:	81.3 KB
ID:	1626234  
bigplumbs is offline  
Reply With Quote
Old 06-22-2011, 04:04 AM
  #106
Henke Torphammar
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,814
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

I scanned through the thread but did find if you weighed the bare kit? empty weights are always intresting
Henke Torphammar is offline  
Reply With Quote
Old 06-22-2011, 04:10 AM
  #107
bigplumbs
Thread Starter
 
Join Date: Jul 2004
Location: England, , UNITED KINGDOM
Posts: 2,725
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

Well as I have never had any instructions I am now pondering the CG. I have 2 other Mig 15's which both fly well see below. I have an Alfa and a J Perkins or OK Mig.

On the Alfa the length of the wing root is 210 mm and the CG is 123 mm from the front = a Percentage of 58 %

On the OK Mig the wing root is 225 mm and the CG is 143 mm back = a percentage of 63 % back.

If I therefore use a Percentage of say 60 % on the P20 Mig and the Wing root is 290 mm this gives me a CG of 174 mm.

To be on the safe side I think I will set it at 170 mm from the leading edge.

This has come out about 23 mm in front of the centreline of the main wheels which would seem correctish

Dennis

Attached Thumbnails
Click image for larger version

Name:	Yv66207.jpg
Views:	35
Size:	82.5 KB
ID:	1626252   Click image for larger version

Name:	Qm35703.jpg
Views:	42
Size:	83.2 KB
ID:	1626253   Click image for larger version

Name:	Xc79905.jpg
Views:	44
Size:	75.8 KB
ID:	1626254   Click image for larger version

Name:	Ga76431.jpg
Views:	38
Size:	53.5 KB
ID:	1626255  
bigplumbs is offline  
Reply With Quote
Old 06-22-2011, 04:12 AM
  #108
bigplumbs
Thread Starter
 
Join Date: Jul 2004
Location: England, , UNITED KINGDOM
Posts: 2,725
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread


Quote:
ORIGINAL: Henke Torphammar

I scanned through the thread but did find if you weighed the bare kit? empty weights are always intresting
I never did weigh her but she was quite light. When I get a moment I will weigh the red one

Dennis
bigplumbs is offline  
Reply With Quote
Old 06-22-2011, 04:46 AM
  #109
bigplumbs
Thread Starter
 
Join Date: Jul 2004
Location: England, , UNITED KINGDOM
Posts: 2,725
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

I am quite pleased because to balance her at 170 mm from the leading edge at the root I have only got to add 65 g of lead which for a Mig 15 is quite good as they are notoriously tail heavy

Dennis
bigplumbs is offline  
Reply With Quote
Old 06-22-2011, 05:17 AM
  #110
bigplumbs
Thread Starter
 
Join Date: Jul 2004
Location: England, , UNITED KINGDOM
Posts: 2,725
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

Well I have finished the Mig.... Here are a couple of pics of her on the floor. The all up dry weight is 2.8 KG which is 6.16 lbs. I think the P20 at 5.25 lbs of thrust should be just about right. I just hope the silver colour is ok to see.

The fuel will add about another 1.8 lbs but should not be there for landing .

Now on to my RC Paraglider

Dennis
Attached Thumbnails
Click image for larger version

Name:	Av68190.jpg
Views:	42
Size:	117.3 KB
ID:	1626268   Click image for larger version

Name:	Rp43025.jpg
Views:	35
Size:	117.6 KB
ID:	1626269  
bigplumbs is offline  
Reply With Quote
Old 06-22-2011, 06:01 AM
  #111
Jgwright
 
Join Date: Jul 2006
Location: Norfolk , UNITED KINGDOM
Posts: 1,360
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

Dennis

See you tonight for the maiden then.

John
Jgwright is offline  
Reply With Quote
Old 06-22-2011, 06:07 AM
  #112
bigplumbs
Thread Starter
 
Join Date: Jul 2004
Location: England, , UNITED KINGDOM
Posts: 2,725
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread


Quote:
ORIGINAL: Jgwright

Dennis

See you tonight for the maiden then.

John
But it is raining like mad and blowing a hoolie. I will bring it along however

Dennis
bigplumbs is offline  
Reply With Quote
Old 06-22-2011, 07:33 AM
  #113
Jgwright
 
Join Date: Jul 2006
Location: Norfolk , UNITED KINGDOM
Posts: 1,360
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

Dennis

It is sunny here now and the wind has dropped a little. Forecast is not that bad for 7 pm. At least you could start it up and drive it about a bit!

John
Jgwright is offline  
Reply With Quote
Old 07-05-2011, 08:25 PM
  #114
lrb75
 
Join Date: Jul 2002
Location: Alexandria, VA
Posts: 690
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

I received a copy of the instructions from KMP. They list the CG as 5.75in back from the leading edge of the wing where it mates to the fuse. I think I attached the pic.
Attached Thumbnails
Click image for larger version

Name:	Zx72635.jpg
Views:	70
Size:	38.3 KB
ID:	1632015  
lrb75 is offline  
Reply With Quote
Old 07-06-2011, 06:42 AM
  #115
cdnbob
 
Join Date: Jun 2011
Location: edmonton, AB, CANADA
Posts: 1
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

any way you can share the plans? I never received any with my plane
cdnbob is offline  
Reply With Quote
Old 07-06-2011, 03:02 PM
  #116
lrb75
 
Join Date: Jul 2002
Location: Alexandria, VA
Posts: 690
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

I posted the word doc file I received from KMP on hobbyking's site where they are still selling these jets.
lrb75 is offline  
Reply With Quote
Old 07-13-2011, 07:58 AM
  #117
bigplumbs
Thread Starter
 
Join Date: Jul 2004
Location: England, , UNITED KINGDOM
Posts: 2,725
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread


Quote:
ORIGINAL: lrb75

I received a copy of the instructions from KMP. They list the CG as 5.75in back from the leading edge of the wing where it mates to the fuse. I think I attached the pic.

The Mig I have built is not the KMP one however it is Pro EDF.............. I am not sure that these are the same planes
bigplumbs is offline  
Reply With Quote
Old 07-13-2011, 03:38 PM
  #118
lrb75
 
Join Date: Jul 2002
Location: Alexandria, VA
Posts: 690
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

It is the same plane made by Pro EDF and it was distributed by KMP.
lrb75 is offline  
Reply With Quote
Old 07-17-2011, 12:20 PM
  #119
bigplumbs
Thread Starter
 
Join Date: Jul 2004
Location: England, , UNITED KINGDOM
Posts: 2,725
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread


Quote:
ORIGINAL: lrb75

It is the same plane made by Pro EDF and it was distributed by KMP.
Many thanks

Dennis
bigplumbs is offline  
Reply With Quote
Old 07-21-2011, 11:07 AM
  #120
bigplumbs
Thread Starter
 
Join Date: Jul 2004
Location: England, , UNITED KINGDOM
Posts: 2,725
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

Success

Well today I thought I would start the engine and give the Mig a Taxi test. Well she ended up being flown and I was very pleased indeed. My trusty test pilot 3dFlip did the honors.

The takeoff run was quite long and we used half flap and the P20 had plenty of power to lift her off. The plane flew a dream and needed next to no trim. The CG was perhaps a little nose heavy but if it is pushed further back I think it would give a few issues on the ground. The landing was good also with a very small bounce and she also landed quite slowely. The pilot reported that the flaps caused next to no trim change and we managed to fly fo 4.25 minutes and only used one of the 2 tanks. So an 8 minute flight is easily acheivable.

All in all I was very pleased indeed. For those interested in this model I would say to get the red one as she was a little difficult to see against a grey sky.

The thing that most impressed me was how quiet the P20 was and also how easy it was to start...... This is a lovely little engine

The power in the climb was excellent and vertical was no problem at all. In my view now that she has flown I would say that this airframe is a perfect partner for the P20...

I feel like I need another P20

Thanks to 3DFlip for another excellent test flight.
bigplumbs is offline  
Reply With Quote
Old 07-21-2011, 11:18 AM
  #121
Jgwright
 
Join Date: Jul 2006
Location: Norfolk , UNITED KINGDOM
Posts: 1,360
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

Well done Dennis and pilot.

It would be nice to see it fly next time you plan to go, as I am always interested in airframes of this size.

John
Jgwright is offline  
Reply With Quote
Old 07-21-2011, 11:29 AM
  #122
siclick33
 
Join Date: Dec 2003
Location: York, UNITED KINGDOM
Posts: 3,553
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

Quote:
I feel like I need another P20
This little engine is so addictive that I've just sold one of my bigger turbines to buy another one. I'm so pleased with the ease of use of the little Jetcat that the bigger turbine will eventually be replaced with a P100 when they become available.

Good to see you have success with the Mig. Now we need video
siclick33 is offline  
Reply With Quote
Old 07-21-2011, 11:36 AM
  #123
3d flip
 
Join Date: Mar 2005
Location: felixstowe, UNITED KINGDOM
Posts: 89
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

Thanks Dennis for letting me play with the P20 I was very impressed with how it ran and how quiet it was ( I think its time to buy one [X(] )

I don't think I have ever seen Dennis look so nerves. The Mig Flew very well, I am looking forward to seeing Dennis fly it.

John
3d flip is offline  
Reply With Quote
Old 07-21-2011, 11:30 PM
  #124
Henke Torphammar
 
Henke Torphammar's Avatar
 
Join Date: Oct 2002
Location: Ljungby, SWEDEN
Posts: 1,814
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

Very nice :-) good with some options beside the Habu32 that has the looks too :-)
Henke Torphammar is offline  
Reply With Quote
Old 07-21-2011, 11:46 PM
  #125
marc s
 
marc s's Avatar
 
Join Date: Jan 2007
Location: farnborough, , UNITED KINGDOM
Posts: 3,131
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default RE: Mig 15 With Jetcat P20 Build Thread

Dennis, good to hear it all went well, and enjoy the little Mig especially on those long dreamy summer evenings we are having here in the UK [:@]

marcs
marc s is offline  
Reply With Quote
Reply


Thread Tools
Search this Thread
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -8. The time now is 11:32 PM.