Thread Tools
This thread is privately moderated by numb_thumb, who may elect to delete unwanted replies.
Old Sep 18, 2007, 02:11 AM
numb_thumb is offline
Find More Posts by numb_thumb
Registered User
Build Log

Funjet / Ultra on Steroids (Current top speed : 182 mph)


This thread started as a build log but now evidently morphed into a hang out place for super fast Funjet and Funjet Ultra setups...So I've started to index all fast setups or useful build pictures as links here...Happy flying !!!

Confirmed Super Fast Records

Psionic001: Fastest yet: 182 mph

Details here

https://www.rcgroups.com/forums/show...&post#16755269

https://www.rcgroups.com/forums/show...&post#16760944

https://www.rcgroups.com/forums/show...&post#16736946

https://www.rcgroups.com/forums/show...&post#16736573

https://www.rcgroups.com/forums/show...&post#16769939

https://www.rcgroups.com/forums/show...&post#16799334

################################################## ################################################## ##

Numb_Thumb: Fastest yet: 154 mph

Details here

Funjet I

May 6th, Blistering fast Funjet on Arc 2T and 6S setup
Feb 19th, EagleTree graphs for a 154 MPH flight

Funjet II

Glassing and Reinforcement
Custom canopy hatch
Custom motor mount 1
Custom Motor Mount 2
Final Assembly

9th Maiden

Funjet III

Airframe Assembly
Motor Mount
Two part Custom Canopy
Cat walk
Maiden

Funjet powered skateboard (Pls do not attempt)

################################################## ################################################## ##

Happy Flying !!!

-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Last edited by numb_thumb; Jan 17, 2011 at 11:25 PM.
Sign up now
to remove ads between posts
Old Sep 18, 2007, 02:12 AM
numb_thumb is offline
Find More Posts by numb_thumb
Registered User

Already thinking about reinforcements


This is my first funjet. Just by looking at the parts and the design, I can say this plane is an easy build. However I think this plane requires minor reinforcements to handle high speeds.
Old Sep 18, 2007, 02:15 AM
numb_thumb is offline
Find More Posts by numb_thumb
Registered User

Twin Carbon tubes


The stock fiberglass tube does not extend all the way to the wing tips and also it flexes more that I wanted to flex. A custom cut carbon tube that extends all the way into fake fuel tanks at the wingtips will help spread the stress to a certain extent.

A front to back carbon tube is a must for my setup. My plan is to go from 3 cell 4 cell and then 6 cell setup, with a long can heavy motor on the back. This carbon tube will distribute the stress of the batterries and the motor evenly throughout the fuselage.
Old Sep 18, 2007, 02:17 AM
numb_thumb is offline
Find More Posts by numb_thumb
Registered User

In case you hadn't noticed


The reason I did not extend the for-aft carbon tube all the way to the front was because

1. I don't want the carbon tube to disform/snap during a unfortunate nose down.

2. The current setup will snap off the foam in the event of a nose down crash just before the battery compart begins (and the carbon tube begins at the front). This will take away much of the impact stress or else it will be distributed throughout the plane (Guess why servo gears rip off in certain type of nose down crashes).

On a worst case scenario I'll end up with a broken nose which most probably can be fixed.
Old Sep 18, 2007, 02:18 AM
numb_thumb is offline
Find More Posts by numb_thumb
Registered User

A little spackle goes a long way


Carbon tubes are covered and the area is re-sanded to restore the contour.
Old Sep 18, 2007, 02:15 PM
numb_thumb is offline
Find More Posts by numb_thumb
Registered User

Getting ready for glassing


Preparation for glassing is underway. I'm using 1/2 ounce, 3/4 ounce and 2 ounce depending on the stress area and also plan to use WBPU and epoxy based resin and hardner for the fuselage.
Old Sep 18, 2007, 02:16 PM
numb_thumb is offline
Find More Posts by numb_thumb
Registered User

Glassing going on


Top right elevon is now glassed. Left side is getting ready. Used WBPU.
Old Sep 18, 2007, 06:18 PM
numb_thumb is offline
Find More Posts by numb_thumb
Registered User

I hate when glassing but I love it when flying a glassed plane


The pic shows glass is drying. Its a overkill to glass the entire fujet (top, bottm, sides, canopy, turtle back) because the EPP foam is better in handling everyday abuses and also I have two carbon tubes extending full length and breadth of the airframe.

May be I will use less glass on my second Funjet. Oh yes, this is my first funjet (aka experimental).

Glassing is a love hate relationship. I hate it when working with messy glassing process but I love it when flying it and showing off to other flyers
Old Sep 19, 2007, 03:22 PM
numb_thumb is offline
Find More Posts by numb_thumb
Registered User

Bottoms done :)


Underside glassing is now complete and dry...
Old Sep 20, 2007, 01:13 PM
numb_thumb is offline
Find More Posts by numb_thumb
Registered User

Top Glassing done


Top glassing complete and dry.

Second round of reinforcement with epoxy based resin in and around the nose and elevons are due next.
Old Sep 20, 2007, 01:14 PM
numb_thumb is offline
Find More Posts by numb_thumb
Registered User

Oops !!!


Almost forgot to glass the stabs.....
Old Sep 21, 2007, 12:30 PM
numb_thumb is offline
Find More Posts by numb_thumb
Registered User

Painting Prep


Next step is to start masking for painting.

The painting scheme I'm thinking of is in line with my stryker's paint scheme, not only because I like it, its different, the visibilty is awesome and I bought two big cans for stryker and and I wanted to use if off before the paint starts drying in the can
Old Sep 24, 2007, 04:10 PM
numb_thumb is offline
Find More Posts by numb_thumb
Registered User

Masking continues....


A black color for elevons and fuel pods would go nicely against any fluroscent color on the wings and fusealge.

So I decided to mask those areas as well. I know few folks out there wondering "I put together a fun jet in 4 hours, why is this guy taking such a loooong time and overkilling it". Well, I have a reason and would like to keep it until a little after maiden.

For now, pls bear with the boring pic of naked funjet with a bit a masking tape for cover
Old Sep 24, 2007, 04:12 PM
numb_thumb is offline
Find More Posts by numb_thumb
Registered User

Color evolving...


This is the first shot of the painted Funjet. The signature of this plane is slowly taking shape.

The masks are still on. I will draw fire scheme on the wing area just like I did for my stryker. It should look really good when completed.
Old Sep 25, 2007, 03:26 PM
numb_thumb is offline
Find More Posts by numb_thumb
Registered User

Another shot from a different angle. The masks are still on.


Another shot from a different angle. The masks are still on.

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Lil Hornet on steroids. :) poobs Parkflyers 6 Mar 22, 2002 08:58 AM
Hummer on Steroids!!!! MarcusT High Performance 3 Mar 10, 2002 05:03 PM
JK E-Plane on steroids voyantus Foamies (Kits) 7 Jan 15, 2002 01:20 PM
Scout on Steroids GaryK Electric Plane Talk 3 May 29, 2001 07:07 PM
"Simple 400 on Cobalt" or... "Taz on Steroids" :) Jensst High Performance 2 May 07, 2001 07:10 PM