HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Apr 01, 2011, 07:43 AM
it wasn't me flying that plane
Hover or die's Avatar
United States, NC, Wilmington
Joined Mar 2011
704 Posts
Build Log
Twin 90mm EDF F-22 50" span 72" lenth

First off I have to thank Hans-Joachim,Veloc-E-Raptor,Frank40,Ed Waldrep, and Steve Shumate for the inspiration for doing this build...I have built 14 different Raptors over the last 2 years and after reading here I decided to do an extra-large version..
I first took the plans Veloc-E-Raptor posted and enlarged them on the comp screen to fit the 90 mm fan first by using the fan bulkhead and enlarging it until the circuference was around 3.55 inches(90mm) and then just scrolled right-left and up-down to trace out all parts onto tiles that i can put together and trace out my foam pieces...the dotted lines for the bulkheads makes this process easy...but time consuming...all of this determined by the fan former sized up to the diameter of 3.5 inches..I realize this may be a hard way of doing this but my printer is down and I am determined...lol..
Most of my planes have had some complete scratch building involved at some point so it is not difficult to do the upscaled plans in this manner..

I plan to also use thrust vectring on this model in the form of 2 -90mm units from RClander...(parkrcmodels.com)

aircraft lenth will be close to 70 inches...

I have been snapping pics as i go and have to learn how to upload them on this site...I will post pics of the whole process and of some of the other
F-22's I have put together..

Large parts will be built out of 9mm and 6mm depron with the skins being constructed out of 3 mil...Also plan to use some ply throughout in critical places for the extra support for pushing 2 strong 90 mm fans..I plan to use 2 of the RCLander fans which range from 6s through 10s and they are extremely powerful in the static thrust department..(parkrcmodels.com)The
10s is good for like 7 to 7-1/2 lbs of thrust per fan unit..

I can only devote 10-15 hrs a week to my projects so it will be a little slow going at first but should pick up pace as the plane gets closer to finish...Please wish me luck as this will be my biggest scratch-build...
thanks fellas..........................Hover or Die(chris)
Hover or die is offline Find More Posts by Hover or die
Last edited by Hover or die; Apr 10, 2011 at 10:00 AM. Reason: needed updating as it is not a parkjet
Reply With Quote
Sign up now
to remove ads between posts
Old Apr 01, 2011, 11:42 AM
Pushing the Limits of FFF
wirbech's Avatar
United States, CA, Sierra Madre
Joined Jun 2005
1,166 Posts
As a fan of the F-22, I can not wait to see your build. I built a twin 70mm About a year or so ago and I am finishing up a pusher version right now. judging by your specs, you are planning about the same size as my pusher and 70mm planes. I used the Jetsett44 raptor and enlarged the planes by 180%. This gives you a plan that is 67" nose to tail and a 48: wing. keep up posted on your adventure.

John
wirbech is offline Find More Posts by wirbech
Reply With Quote
Old Apr 01, 2011, 12:00 PM
up up and away
United States, LA, Ferriday
Joined Mar 2008
359 Posts
subscribed........
ac_rite90 is online now Find More Posts by ac_rite90
Reply With Quote
Old Apr 01, 2011, 12:37 PM
Registered User
Ed Waldrep's Avatar
Las Vegas, NV
Joined Dec 1996
7,927 Posts
Here's some inspiration for you. I've got a thread somewhere, a search for my name (thread started by...) will bring it up.

It's scratchbuilt from my own design, the first version flew in 2005 as a twin MF 480. The big flys so much better.

It's been a while since I looked at the jetset F-22. The shape was pretty good but of course the layout is different for an edf, and I'm sure my layout is the best, I even have retracts!

I may offer plans soon but the problem is motivation...big time burnout lately.
Ed Waldrep is offline Find More Posts by Ed Waldrep
Last edited by Ed Waldrep; Apr 01, 2011 at 12:43 PM.
Reply With Quote
Old Apr 02, 2011, 07:11 AM
it wasn't me flying that plane
Hover or die's Avatar
United States, NC, Wilmington
Joined Mar 2011
704 Posts
A few pics of earlier builds....Standard and an extra-small version..yes it flies!!I wanted to add a few things here...I open the back up more than others do because after experimenting with vertical thrust I determined that there is an easy to see difference in upline climbout...Also the 6X4 Stryker prop from Horizon is much stronger(in thrust) than the APC 6X4...Not even close...Nearly a 3rd more thrust from the stryker prop..It even looks more aerodynamic...
We used the stryker motors to power these foamies for a long time and they gave slightly more than a 1 to 1 thrust to weight ratio..Now I use a motor with at least 2 to 1 thrust to weight and top speeds over 100mph easy...(3 cells)(2200)On 4 cells its almost too much...
Hover or die is offline Find More Posts by Hover or die
Last edited by Hover or die; Apr 02, 2011 at 07:24 AM.
Reply With Quote
Old Apr 02, 2011, 07:16 AM
it wasn't me flying that plane
Hover or die's Avatar
United States, NC, Wilmington
Joined Mar 2011
704 Posts
fellas,thanks for stopping by...I have the upload figured out now and will get to building and posting pics as I go...I also have a digital camcorder so should be able to do videos as well...
Take care.......................HoD
Hover or die is offline Find More Posts by Hover or die
Reply With Quote
Old Apr 02, 2011, 09:23 AM
it wasn't me flying that plane
Hover or die's Avatar
United States, NC, Wilmington
Joined Mar 2011
704 Posts
A few pics of tiling technique....Enlarge-trace-tape-cut....
last pic shows vertical fin size..Standard comp paper..
Hover or die is offline Find More Posts by Hover or die
Reply With Quote
Old Apr 02, 2011, 04:36 PM
it wasn't me flying that plane
Hover or die's Avatar
United States, NC, Wilmington
Joined Mar 2011
704 Posts
After laying this thing out on the kitchen floor and looking over the measurments I decided to scrap it and go up one more size to where the fan formers are now at 4 inches...I just could'nt see squeezing 2 90 mm fans so close together...And it would have been way overkill..Now the fans can rest a little apart and gives room for the vectors and associated linkages...
Update pics tomorrow..............HoD
Hover or die is offline Find More Posts by Hover or die
Reply With Quote
Old Apr 07, 2011, 11:14 AM
it wasn't me flying that plane
Hover or die's Avatar
United States, NC, Wilmington
Joined Mar 2011
704 Posts
OK,
finally got the plans mostly finished...I just have a few of the skins to layout,most are done..
Here's a few pics of the new layout..50" Wingspan and 72" lenth...Fan former was 4" and I reduced the circumference to 3.5" for the 90 mil fans..
I will also have to move the fans further towards the COG to make balancing easier when that time comes...I will detail everything I do here for future reference for others...
If you guys have any good ideas for landing gear for this size bird please feel free to put your .02 in...I can use all the help I can get and there are some true masters roaming this forum...Thanks in advance....

Will be picking up 6 and 9 mil depron this weekend.... Has anyone used the product Liquid Sheet...2 part brush on covering....Hard layer for covering foam..

A few pics....more to come...
Hover or die is offline Find More Posts by Hover or die
Reply With Quote
Old Apr 07, 2011, 02:16 PM
it wasn't me flying that plane
Hover or die's Avatar
United States, NC, Wilmington
Joined Mar 2011
704 Posts
I wanted to post a few of the reference photos I have been looking at for inspiration..The one with the gold canopy make one heck of a nice desktop..It also shows good detail in control surfaces including the leading edge slats..
Hover or die is offline Find More Posts by Hover or die
Last edited by Hover or die; Apr 07, 2011 at 02:22 PM.
Reply With Quote
Old Apr 10, 2011, 07:59 AM
it wasn't me flying that plane
Hover or die's Avatar
United States, NC, Wilmington
Joined Mar 2011
704 Posts
OK,,,here we go....I think...
a few pics...more today...
Hover or die is offline Find More Posts by Hover or die
Reply With Quote
Old Apr 10, 2011, 10:08 AM
it wasn't me flying that plane
Hover or die's Avatar
United States, NC, Wilmington
Joined Mar 2011
704 Posts
Do any of you guys have an idea what kind of weight gain I would be looking at if I glassed the outside of the aircraft with an ultra-light cloth and a paper-towel blot over the surface while still wet to get all excess resin off the model...I can get .58oz.per yard square...really light cloth...1.2 mils thick or
(.02mm)...Please give input if possible as I would like the extra shell strenth of a light glass layer...
Thanks in advance fellas...........................Chris


Ed,if you stop through could you tell me what landing gear you used on your big raptor?All up weight of same?Thanks!
Hover or die is offline Find More Posts by Hover or die
Reply With Quote
Old Apr 10, 2011, 08:51 PM
High Altitude Specialist
snivilous's Avatar
Joined Jan 2010
867 Posts
Sweet. My ultimate goal of this hobby has been to build a giant F-22 with twin 127mm fans or larger once I get my building skills and design skills good enough for total scale stuff.
snivilous is offline Find More Posts by snivilous
Reply With Quote
Old Apr 11, 2011, 09:04 AM
it wasn't me flying that plane
Hover or die's Avatar
United States, NC, Wilmington
Joined Mar 2011
704 Posts
I have redesigned the bulkheads in the nose as they are not exactly what I'm looking for...I will post up a few pics this evening showing progress...I found a few pics that show the nose profile a little better and will try to duplicate to the best of my ability..
I'm using gorilla glue for glueing up the main structure as it is very very strong but a little slow to cure LOL..
Having fun nonetheless..
Snivilous,
this is my biggest project so far...I've built many pusher jets and a few EDF's but nothing this big to date...I can't wait to see it start to come together...
Take care all..................................Chris

A few nose profile pics..
Hover or die is offline Find More Posts by Hover or die
Reply With Quote
Old Apr 12, 2011, 07:49 AM
Registered User
Si Goodchild's Avatar
Lincolnshire, UK
Joined Oct 2009
522 Posts
Quote:
Originally Posted by Hover or die View Post
Do any of you guys have an idea what kind of weight gain I would be looking at if I glassed the outside of the aircraft with an ultra-light cloth and a paper-towel blot over the surface while still wet to get all excess resin off the model...I can get .58oz.per yard square...really light cloth...1.2 mils thick or
(.02mm)...Please give input if possible as I would like the extra shell strenth of a light glass layer...
I've no idea what your weight gain will be but it sounds like a must-do mod to me. With a pair of Lander 90mm units in there and a pair of batteries in the 6s 5000 range you've got some pretty hefty point-loads for a depron airframe. Wood formers and load-spreaders sound like a necessity and a good stiff outer shell can only help keep the jet flying on-track. There's no point having a super-light, super-powerful airfrme if it self destructs on landing or when pulling high-G!
Si Goodchild is offline Find More Posts by Si Goodchild
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Jetset44 F-14 Parkjet converted to Twin EDF FL62 Foamy EDFs 774 Jun 11, 2014 02:50 PM
Sold Nitroplanes F-22 Raptor Twin EDF, RTF dbarrym Aircraft - Electric - Jets (FS/W) 8 Jan 19, 2011 10:51 PM
Sold Texas Hanger Clearing! 90mm EDF's, Blade 400, F-16, F/A-18C Roswalt Non R/C Items (FS/W) 2 Oct 27, 2010 09:35 PM
Discussion JHH F-4 Twin 90mm EDF Conversion PhilLin Electric Ducted Fan Jet Talk 421 Dec 11, 2008 10:50 PM
For Sale YF-22 Twin 90mm EDF danj31 Aircraft - Fuel - Jets (FS/W) 3 Oct 13, 2006 11:27 AM