Go Back  RCU Forums > RC Airplanes > RC Jets
Reload this Page >

CARF-Models Mig 17 build thread

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

CARF-Models Mig 17 build thread

Old 08-16-2022, 08:48 AM
  #151  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 12,635
Received 533 Likes on 396 Posts
Default

Down to the last wire to run for canopy closing. Last job will be final weights and balance where Retract and light batteries will be finally positioned








The following users liked this post:
jcterrettaz (08-16-2022)
Old 08-16-2022, 01:21 PM
  #152  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 12,635
Received 533 Likes on 396 Posts
Default

Spent most of today on customer Simonís Mig set up. JetCat P-220Rxi and Powerbox SR2 with ISat Gyro. MacGregor servos-he uses Futaba hence most of day to do the set up!
Paperwork to do and itís ready to fly.



Old 08-17-2022, 03:08 AM
  #153  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 12,635
Received 533 Likes on 396 Posts
Default

Thought about this for a while and decided I didnít want a loose lead to plug in for the hatch/canopy opening.
Powerbox 1132 One4One connector auto plugs it in.





Old 08-17-2022, 11:31 AM
  #154  
Newton5019
 
Join Date: Apr 2011
Location: Amersham, UNITED KINGDOM
Posts: 63
Received 4 Likes on 3 Posts
Default

Dave

How much clearance is there between bootom of turbine and tank directly underneath ?

T
Old 08-17-2022, 12:10 PM
  #155  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 12,635
Received 533 Likes on 396 Posts
Default

It’s not the tank it’s the fittings. A couple of mm. How much bigger is your Krashtec?
Old 08-17-2022, 12:17 PM
  #156  
Newton5019
 
Join Date: Apr 2011
Location: Amersham, UNITED KINGDOM
Posts: 63
Received 4 Likes on 3 Posts
Default

120mm can diameter on the crash techs

jet cats wonít get passed the take off phase 😂😘
Old 08-17-2022, 12:22 PM
  #157  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 12,635
Received 533 Likes on 396 Posts
Default

Won’t fit.
Old 08-17-2022, 12:25 PM
  #158  
Newton5019
 
Join Date: Apr 2011
Location: Amersham, UNITED KINGDOM
Posts: 63
Received 4 Likes on 3 Posts
Default

250 JC is floating one about

best cancel the order and carry on with my tiger moth 😂
Old 08-18-2022, 10:39 AM
  #159  
Auburn02
My Feedback: (1)
 
Auburn02's Avatar
 
Join Date: May 2005
Posts: 1,073
Received 27 Likes on 21 Posts
Default

Originally Posted by Newton5019 View Post
120mm can diameter on the crash techs
I know of one flying with a Jet Central Dragon, specs show a 133mm diameter on that one. Can't provide pictures but it works one way or another.
Old 08-18-2022, 01:08 PM
  #160  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 12,635
Received 533 Likes on 396 Posts
Default

If you change the centre tank…
Old 08-18-2022, 11:26 PM
  #161  
Newton5019
 
Join Date: Apr 2011
Location: Amersham, UNITED KINGDOM
Posts: 63
Received 4 Likes on 3 Posts
Default

235 in the demo model in 119 mm so I canít see 1mm making a difference ?
Old 08-19-2022, 05:26 AM
  #162  
jackdiazccs
Member
 
Join Date: Sep 2020
Posts: 42
Received 14 Likes on 12 Posts
Default

Originally Posted by Newton5019 View Post
235 in the demo model in 119 mm so I canít see 1mm making a difference ?
If 1mm makes the difference, then just shim the mount. 1mm won't affect the thrust line
The following users liked this post:
Newton5019 (08-19-2022)
Old 08-19-2022, 05:46 AM
  #163  
jackdiazccs
Member
 
Join Date: Sep 2020
Posts: 42
Received 14 Likes on 12 Posts
Default

An idea for holding the hatch in order to be able to remove it without opening the canopy.
The other magnets are inside the hatch lip.

Warning: don't cut your nails too close

Jack



Old 08-19-2022, 05:53 AM
  #164  
jackdiazccs
Member
 
Join Date: Sep 2020
Posts: 42
Received 14 Likes on 12 Posts
Default

One more pic



Old 08-19-2022, 11:49 AM
  #165  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 12,635
Received 533 Likes on 396 Posts
Default

Maybe the 235 is shorter? Itís only the fittings.

I have magnets too under the flanges. Mixed thought on them being strong enough. We will see!

Travel stand for my short wheel base van. The rear fuselage plugs into four 20mm carbon pegs. Few more details to add.
It will also carry the wing tubes, pitot tubes and aerials.




Old 08-19-2022, 12:38 PM
  #166  
jackdiazccs
Member
 
Join Date: Sep 2020
Posts: 42
Received 14 Likes on 12 Posts
Default

[QUOTE=Dave Wilshere;12740518

I have magnets too under the flanges. Mixed thought on them being strong enough. We will see!

[/QUOTE]


Then I'm lucky to maiden after you .....

What diameter are your magnets ? Mine are 7mm. Using 3 pairs.

Jack
Old 08-19-2022, 01:21 PM
  #167  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 12,635
Received 533 Likes on 396 Posts
Default

Jack

6mm. I thought about one on the face too, but they are weak in shear. I can go to 4. Just wanted to see I could still open it first 😄
I have the original steel pins to locate the hatch. My intention is to test fly with two strips of clear diamond tape over the joint line…with a slack loop over the joint. If the hatch lifts 2mm the tape will go tight and I should see it lifted, but not lose the hatch.
I’ll be your test mule 😉
Old 08-24-2022, 07:29 PM
  #168  
TSHARK203
My Feedback: (206)
 
TSHARK203's Avatar
 
Join Date: Oct 2004
Location: AUBURN, AL
Posts: 778
Received 2 Likes on 2 Posts
Default

Does or has anyone set their cg up with the Xicoy balancer. I would like to see what everyone has for cg and compare notes. Still trying to figure out battery placement.
Old 08-24-2022, 08:50 PM
  #169  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 12,635
Received 533 Likes on 396 Posts
Default

I used the accurate string trapped between each wing method. I just donít see undercarriage axles all being in the same position on every model where itís a trailing link set up.
note all the fuel is just forward of the balance point, so I put 1ltr in the centre tank to balance my Mig.
Old 08-25-2022, 03:02 AM
  #170  
Bob_B
My Feedback: (11)
 
Bob_B's Avatar
 
Join Date: Nov 2003
Location: Bluegrass State of Mind
Posts: 4,632
Received 66 Likes on 58 Posts
Default

What! No chocolate pots?
Old 08-26-2022, 04:34 AM
  #171  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 12,635
Received 533 Likes on 396 Posts
Default

Turbine test run done, just need paperwork and suitable weather/venue.

My stand idea failedÖshould have checked height before making all the parts! Working on the second ideaÖ











The following users liked this post:
jcterrettaz (08-27-2022)
Old 08-26-2022, 05:01 AM
  #172  
jackdiazccs
Member
 
Join Date: Sep 2020
Posts: 42
Received 14 Likes on 12 Posts
Default

David,
Whenever you have the time, please let me know the weight on the nose wheel once you are satisfied with the balance.
Did you abandon the magnets idea for holding the front hatch ?
Hope the maiden goes uneventful.

Jack

Last edited by jackdiazccs; 08-26-2022 at 05:04 AM.
Old 08-26-2022, 07:59 AM
  #173  
jackdiazccs
Member
 
Join Date: Sep 2020
Posts: 42
Received 14 Likes on 12 Posts
Default

Progress so far !
Estimate one more month to finish her.



Subject full size






The following 2 users liked this post by jackdiazccs:
jcterrettaz (08-27-2022), yeahbaby (08-26-2022)
Old 08-26-2022, 11:16 AM
  #174  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 12,635
Received 533 Likes on 396 Posts
Default

Jack

No I still have the two magnets. I have kept the CARF vertical wire pins, even just those the hatch would stay in position while the fuselage was rolled over.
Iím convinced the Magnets will be fine.
I have positioned everything based on CARFís balance being too safe. I added 85g of removable weight in the nose that I expect to remove after the first flight. Will give you a nose weight when I can fly it. No paperwork yet and anyway Iím off to do a UAS flight test for three days.

Dave
Old 08-26-2022, 11:16 AM
  #175  
Dave Wilshere
Thread Starter
 
Join Date: Jun 2002
Location: Watford, UNITED KINGDOM
Posts: 12,635
Received 533 Likes on 396 Posts
Default

Originally Posted by jackdiazccs View Post
Progress so far !
Estimate one more month to finish her.



Subject full size





Looks great.
D
The following users liked this post:
yeahbaby (08-26-2022)

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.