Go Back  RCU Forums > RC Airplanes > RC Warbirds and Warplanes
Reload this Page >

P-39 Airacobra Brotherhood

Notices
RC Warbirds and Warplanes Discuss rc warbirds and warplanes in this forum.

P-39 Airacobra Brotherhood

Old 04-22-2022, 03:24 AM
  #226  
rowdog_14
My Feedback: (5)
 
rowdog_14's Avatar
 
Join Date: Sep 2005
Location: Austell, GA
Posts: 1,152
Received 11 Likes on 11 Posts
Default

Hello All, just purchased a TF Gold. Probably will not get to building it anytime soon but really want to scale it out with a Mid-Engine . Lets see how that goes, already started reading the mid engine setup and not looking too promising but I have time . Will scan through through this thread for all the help I can get.

Anyone with retracts no longer needed?
Old 04-22-2022, 04:22 AM
  #227  
FlyerInOKC
My Feedback: (6)
 
FlyerInOKC's Avatar
 
Join Date: Nov 2004
Location: Oklahoma City, OK
Posts: 13,553
Received 156 Likes on 142 Posts
Default

Hi Rowdog! I bought my P-39 GE kit little over a month ago as part of a package deal with two other kits. A couple of weeks back I was able to locate the Robart nose gear for about half the cost of a new one. The main gear should be easier to find but I haven't look yet. I recommend a "WANTED" ad on RCG to find the nose gear it worked for me. Fiberglass Specialties still has the half cowl for $28, I prefer fiberglass over plastic when available. I found a guy selling reproduction TF cockpits here: https://planesgoneby.com/products/TF...Kit-p456601938 I haven't ordered mine yet shot the wad at FS.

Hey how about signing us two up for the brotherhood?!
Old 04-22-2022, 05:07 AM
  #228  
rowdog_14
My Feedback: (5)
 
rowdog_14's Avatar
 
Join Date: Sep 2005
Location: Austell, GA
Posts: 1,152
Received 11 Likes on 11 Posts
Default

Originally Posted by FlyerInOKC View Post
Hi Rowdog! I bought my P-39 GE kit little over a month ago as part of a package deal with two other kits. A couple of weeks back I was able to locate the Robart nose gear for about half the cost of a new one. The main gear should be easier to find but I haven't look yet. I recommend a "WANTED" ad on RCG to find the nose gear it worked for me. Fiberglass Specialties still has the half cowl for $28, I prefer fiberglass over plastic when available. I found a guy selling reproduction TF cockpits here: https://planesgoneby.com/products/TF...Kit-p456601938 I haven't ordered mine yet shot the wad at FS.

Hey how about signing us two up for the brotherhood?!
Nice on your grab. I hope I can find the gear for half of original cost. I have some sierra main gears. I might see if they will work. If not Robart it will be. Yeah I need to get a few other fiberglass cowl from them, thanks for the reminder. As far as the cockpit repro, that is great !!! Never knew about that site. Mine comes with the cockpit kit but I need two other kits and hopefully they have them.
Old 04-22-2022, 05:35 AM
  #229  
FlyerInOKC
My Feedback: (6)
 
FlyerInOKC's Avatar
 
Join Date: Nov 2004
Location: Oklahoma City, OK
Posts: 13,553
Received 156 Likes on 142 Posts
Default

I found the main gear a bit confusing with the manual calling for one model Robart mains and the Robart Gear Finder listing three different model numbers. I think the main thing is to use a 85 degree main matched to the finished all up weight. I plan on going whole hog and using Robo Struts on the mains like on the nose gear, they look so much better than piano wire. Have you seen the new Robart quick disconnects with the check valve built in? The model number is 190-CV.
Old 04-22-2022, 08:15 AM
  #230  
rowdog_14
My Feedback: (5)
 
rowdog_14's Avatar
 
Join Date: Sep 2005
Location: Austell, GA
Posts: 1,152
Received 11 Likes on 11 Posts
Default

Originally Posted by FlyerInOKC View Post
I found the main gear a bit confusing with the manual calling for one model Robart mains and the Robart Gear Finder listing three different model numbers. I think the main thing is to use a 85 degree main matched to the finished all up weight. I plan on going whole hog and using Robo Struts on the mains like on the nose gear, they look so much better than piano wire. Have you seen the new Robart quick disconnects with the check valve built in? The model number is 190-CV.
Ok cool, yeah my sierra's are a set of 85 degree mains and a 100 degree nose. Hopefully the mains will at least work and I will only have to buy a 105 degree nose. Yes I would do strut too, that will look much better. No did not know they had ones with check valves.Oh man I really would love the 190-CV!!! I wonder if moisture will start to enter the system like my large air compressor if it stay under pressure for too long? Thanks for the details.
Old 04-22-2022, 08:34 AM
  #231  
FlyerInOKC
My Feedback: (6)
 
FlyerInOKC's Avatar
 
Join Date: Nov 2004
Location: Oklahoma City, OK
Posts: 13,553
Received 156 Likes on 142 Posts
Default

Install a drier at the compressor or ahead of the air chuck on the hose should prevent any moisture. The CV190-CVs just came out. I saw it in the Robart Newsletter.
Old 04-22-2022, 08:49 AM
  #232  
rowdog_14
My Feedback: (5)
 
rowdog_14's Avatar
 
Join Date: Sep 2005
Location: Austell, GA
Posts: 1,152
Received 11 Likes on 11 Posts
Default

Originally Posted by FlyerInOKC View Post
Install a drier at the compressor or ahead of the air chuck on the hose should prevent any moisture. The CV190-CVs just came out. I saw it in the Robart Newsletter.
I have one on my paint gun and large compressor. You think similar things will be needed for a rc setup with a tank that is holding compressed air for long periods?
Old 04-22-2022, 09:16 AM
  #233  
FlyerInOKC
My Feedback: (6)
 
FlyerInOKC's Avatar
 
Join Date: Nov 2004
Location: Oklahoma City, OK
Posts: 13,553
Received 156 Likes on 142 Posts
Default

The tank on the airplane is so small it shouldn't need one, no room anyway. A drier on the tank and the hose should do the trick.
Old 04-26-2022, 08:18 AM
  #234  
rowdog_14
My Feedback: (5)
 
rowdog_14's Avatar
 
Join Date: Sep 2005
Location: Austell, GA
Posts: 1,152
Received 11 Likes on 11 Posts
Default

Originally Posted by FlyerInOKC View Post
The tank on the airplane is so small it shouldn't need one, no room anyway. A drier on the tank and the hose should do the trick.
👍

on another note it came in!!!!! Ready to try and put a mid-engine! Even if it is not functional I can just have as a display model and have engine side panel with scale exhaust!

Old 04-26-2022, 08:39 AM
  #235  
FlyerInOKC
My Feedback: (6)
 
FlyerInOKC's Avatar
 
Join Date: Nov 2004
Location: Oklahoma City, OK
Posts: 13,553
Received 156 Likes on 142 Posts
Default

What engine do you plan to use?
Old 04-26-2022, 09:27 AM
  #236  
rowdog_14
My Feedback: (5)
 
rowdog_14's Avatar
 
Join Date: Sep 2005
Location: Austell, GA
Posts: 1,152
Received 11 Likes on 11 Posts
Default

Originally Posted by FlyerInOKC View Post
What engine do you plan to use?
Probably an RCV 90 and run a three blade higher pitch to comp for the gear ratio of the RCV? Thoughts?
Old 04-26-2022, 10:31 AM
  #237  
FlyerInOKC
My Feedback: (6)
 
FlyerInOKC's Avatar
 
Join Date: Nov 2004
Location: Oklahoma City, OK
Posts: 13,553
Received 156 Likes on 142 Posts
Default

I have a Super Tigre .75 and a Saito FA-82 so I will probably use one of those. The RCV90 is nice you don't have a cylinder head sticking out.
Old 04-26-2022, 11:54 AM
  #238  
rowdog_14
My Feedback: (5)
 
rowdog_14's Avatar
 
Join Date: Sep 2005
Location: Austell, GA
Posts: 1,152
Received 11 Likes on 11 Posts
Default

Originally Posted by FlyerInOKC View Post
I have a Super Tigre .75 and a Saito FA-82 so I will probably use one of those. The RCV90 is nice you don't have a cylinder head sticking out.
Either of those should work and yeah I think trying to make it a mid engine the RCV will be best to keep engine inside the fuselage.
Old 04-26-2022, 08:01 PM
  #239  
FlyerInOKC
My Feedback: (6)
 
FlyerInOKC's Avatar
 
Join Date: Nov 2004
Location: Oklahoma City, OK
Posts: 13,553
Received 156 Likes on 142 Posts
Default

Balancing it out will be a big challenge!
Old 04-27-2022, 03:55 AM
  #240  
rowdog_14
My Feedback: (5)
 
rowdog_14's Avatar
 
Join Date: Sep 2005
Location: Austell, GA
Posts: 1,152
Received 11 Likes on 11 Posts
Default

Originally Posted by FlyerInOKC View Post
Balancing it out will be a big challenge!
Yep, looks like it would mount about 3-4 inches behind the CG point. Probably could move the servo battery and maybe air tank(smaller) forward of the engine. Also possibly mount the battery in the nose. These are just thoughts because I have read not so much on a mid-engine mount nor have I seen one . I heard one existed but have not been able to find any details . I might end up going with the norm . The RCV90 is about 29 oz and swings a 15x13 3 blade prop which should be good. If this builds like any other warbird then it will be really tail heavy . Hopefully I can find at least one other person that had tried something similar .
Old 04-27-2022, 04:28 AM
  #241  
FlyerInOKC
My Feedback: (6)
 
FlyerInOKC's Avatar
 
Join Date: Nov 2004
Location: Oklahoma City, OK
Posts: 13,553
Received 156 Likes on 142 Posts
Default

Good luck but I think you could be biting off more than you can chew. If you do a building log I will be the first to subscribe!
Old 04-27-2022, 04:02 PM
  #242  
rowdog_14
My Feedback: (5)
 
rowdog_14's Avatar
 
Join Date: Sep 2005
Location: Austell, GA
Posts: 1,152
Received 11 Likes on 11 Posts
Default

Originally Posted by FlyerInOKC View Post
Good luck but I think you could be biting off more than you can chew. If you do a building log I will be the first to subscribe!
Yep I feel it will be a heavy challenge.
Old 04-29-2022, 12:04 AM
  #243  
affas
 
affas's Avatar
 
Join Date: Dec 2002
Location: Lier, NORWAY
Posts: 562
Received 9 Likes on 9 Posts
Default

I`ve got a 2,5m P39 with fiberglass fuselage and foam wings. Long therm project but I am thinking of a MVVS Water cooled center mounted enigne.

Anyone here ever seen or tried a MVVS Watercooled engine?




Old 04-29-2022, 05:32 AM
  #244  
FlyerInOKC
My Feedback: (6)
 
FlyerInOKC's Avatar
 
Join Date: Nov 2004
Location: Oklahoma City, OK
Posts: 13,553
Received 156 Likes on 142 Posts
Default

Originally Posted by affas View Post
I`ve got a 2,5m P39 with fiberglass fuselage and foam wings. Long therm project but I am thinking of a MVVS Water cooled center mounted enigne.

Anyone here ever seen or tried a MVVS Watercooled engine?



That is a lot larger than the Top Flite kits we have. Nice looking bird! I have heard of the MVVS engines but I have never seen one in the flesh.
Old 05-01-2022, 04:48 AM
  #245  
rowdog_14
My Feedback: (5)
 
rowdog_14's Avatar
 
Join Date: Sep 2005
Location: Austell, GA
Posts: 1,152
Received 11 Likes on 11 Posts
Default

Originally Posted by affas View Post
I`ve got a 2,5m P39 with fiberglass fuselage and foam wings. Long therm project but I am thinking of a MVVS Water cooled center mounted enigne.

Anyone here ever seen or tried a MVVS Watercooled engine?



that think is a beast! Never saw a MVVS.
Old 08-16-2022, 01:22 AM
  #246  
rowdog_14
My Feedback: (5)
 
rowdog_14's Avatar
 
Join Date: Sep 2005
Location: Austell, GA
Posts: 1,152
Received 11 Likes on 11 Posts
Default

Just purchased a RCV 90…we will see in time if I can get the mid engine to work out . I know, I know
Old 08-16-2022, 04:20 AM
  #247  
FlyerInOKC
My Feedback: (6)
 
FlyerInOKC's Avatar
 
Join Date: Nov 2004
Location: Oklahoma City, OK
Posts: 13,553
Received 156 Likes on 142 Posts
Default

I was thinking about your mid-engine idea, are you going to have room for the air tank or will you with electric retracts? I just made a deal with a guy for an extra set of # 605 Robart gear they are 90 degree but with a little work should work fine.

I asked Robart why I find more than one gear listed for different TF kits and they explained it to me. The less expensive gear with the wire legs are entry level and designed for builders on a budget or want the more forgiving spring wire when you make a less than perfect landing. The 5/32" wire can handle harder landings without damage than an oleo strut. The more expensive sets are more scale. Robart is trying to give us a choice. I think I will stick with the wire on the mains until I prefect my landings and then change over to oleo struts.
Old 08-16-2022, 05:39 AM
  #248  
rowdog_14
My Feedback: (5)
 
rowdog_14's Avatar
 
Join Date: Sep 2005
Location: Austell, GA
Posts: 1,152
Received 11 Likes on 11 Posts
Default

Originally Posted by FlyerInOKC View Post
I was thinking about your mid-engine idea, are you going to have room for the air tank or will you with electric retracts? I just made a deal with a guy for an extra set of # 605 Robart gear they are 90 degree but with a little work should work fine.

I asked Robart why I find more than one gear listed for different TF kits and they explained it to me. The less expensive gear with the wire legs are entry level and designed for builders on a budget or want the more forgiving spring wire when you make a less than perfect landing. The 5/32" wire can handle harder landings without damage than an oleo strut. The more expensive sets are more scale. Robart is trying to give us a choice. I think I will stick with the wire on the mains until I prefect my landings and then change over to oleo struts.
Thanks for the information. I was wondering the same for the gear. I was looking to do electrics, I have have used Robarts electrics on two other planes and like them.

Now I just need to find a deal like you 😂 on the gear!
Old 08-16-2022, 06:20 AM
  #249  
FlyerInOKC
My Feedback: (6)
 
FlyerInOKC's Avatar
 
Join Date: Nov 2004
Location: Oklahoma City, OK
Posts: 13,553
Received 156 Likes on 142 Posts
Default

The hard part is the correct specially made nose gear. I paid considerably less than the new price but it was still more than the main gear. I didn't think a generic wire nose gear was going to sit and look right so I bit the bullet. I don't have to tell you building is about compromise but its part of the fun.
Old 08-16-2022, 09:01 AM
  #250  
rowdog_14
My Feedback: (5)
 
rowdog_14's Avatar
 
Join Date: Sep 2005
Location: Austell, GA
Posts: 1,152
Received 11 Likes on 11 Posts
Default

Originally Posted by FlyerInOKC View Post
The hard part is the correct specially made nose gear. I paid considerably less than the new price but it was still more than the main gear. I didn't think a generic wire nose gear was going to sit and look right so I bit the bullet. I don't have to tell you building is about compromise but its part of the fun.
Agreed…

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.