Pitty - Pitts inspired 24 inch bipe, with plans! - Page 4 - RC Groups
Shop our Airplanes Products Drone Products Sales
Thread Tools
Jun 20, 2011, 11:48 AM
Registered User
slebetman's Avatar
I'd just like to make a few quick notes about the build as of the maiden flight.

Because I was worried about rolls being too sensitive I decided to install control horns only on the bottom ailerons even though I've hinged all four ailerons. The top ailerons are temporarily fixed in place by a few bits of 6mm foam and double sided tape.

I also installed a small fiberglass spar on the upper wing. I originally intended the design to be sparless because I had great success with other 24 inch sparless designs. But in the end I chickened out and installed a spar anyway.

The final hardware for the maiden are:

Battery: either 2S 370mAh or 2S 610mAh (swapping between the two didn't require much trim changes, just a couple of clicks on the elevator).
Motor: AX 1806N 2100kv 19g brushless.
ESC: Hobbyking 15-18A SS series.
Prop: 6x4.3

The CG is roughly towards the rear of the cabanes. I'll update the plans later to indicate CG directly in the template so you can mark it as you build.

The elevator is trimmed almost neutral with just a couple of clicks up. Of course, angle of incidence between the wings and horizontal stabilizer is zero.

Amazingly, with zero dihedral on both wings she flies perfectly fine with just rudder and elevator. I actually have my transmitter set up so that I can change from ailerons to RET at the flick of a switch and for the maiden I mostly fly her in RET mode.
Sign up now
to remove ads between posts
Jun 20, 2011, 12:05 PM
Registered User
slebetman's Avatar
I decided to add a few more finishing touches. I made a spinner out of a block of foam by tacking the block onto a small wooden dowel with hotglue and then attaching the whole thing to a drill to make a simple lathe. I then formed the foam using a metal file and a block of sandpaper.

I stole the idea of how to attach the spinner from another build thread (sorry, can't find it right now). I used a plastic tube that fits snug on the motor shaft to extend the shaft and then installed the spinner onto the tube.

I also made a pair of spats (wheel pants) for the wheels. It's built up from 3mm depron. if anyone's interested I can post the template for them.
Jun 20, 2011, 08:36 PM
Registered User
I will start my build this week. This is going to be fun!!!
Jun 20, 2011, 09:52 PM
Ken's CAD Models
dz1sfb's Avatar
Very attractive build!

Latest blog entry: Ken's CAD Models new web site
Jun 20, 2011, 10:15 PM
Registered User
slebetman's Avatar
Updated the plans to include CG location. I'd say it should be safe to shift the cg up to 2 cm forward and 1 cm back. She flies well with quite a wide range of CG.

Also included a template for the wheel pants. Should fit any 2 inch wheels. If not, scale it to fit.
Jun 20, 2011, 10:41 PM
Registered User
slebetman's Avatar
Originally Posted by soulreaper
I will start my build this week. This is going to be fun!!!
I'm looking forward to it.

I was tempted to build another just to see if there are any bugs with the current plans since I built mine based on the old incomplete and uncorrected plans. Please do inform me if you find any errors or need any clarifications.
Jun 21, 2011, 10:59 PM
Registered User
slebetman's Avatar
Added a firewall template as promised. See first post.

I don't use a firewall for my motor installation so the template is untested but I don't see anything wrong with my measurements.
Feb 13, 2014, 05:16 PM
Registered User
vinnieg's Avatar

DTF Pitty

I have the pitty mostly built. Here are a few pics of the plane so far.
Last edited by vinnieg; Feb 13, 2014 at 05:25 PM.
Jun 28, 2015, 04:22 AM
It's all about fun!
AuzzieBob's Avatar
Hi guys......this is my scaled down and modified version of slebetman's Pitty.
Scaled down to 525mm wing span and made out of 6mm depron (it was all I had in my stock 3mm would have been better).....powered with a Park 250 2200kv, GWS 7x3.5 prop, 10amp esc, 3xHK 0S361 servos, R410X Rx and a 300mah 35-70c battery.
All up flying weight 132g.......fly’s beautiful…..planning on using it for a bit of fun indoors as we now have a venue here at Hervey Bay down under!

Thanks for the inspiration everyone........Cheers Rob
Jun 29, 2015, 11:59 PM
Registered User
slebetman's Avatar
Nice! Glad to hear it's well-behaved. Mine's not flying anymore. I think it's time I build this again. Maybe a micro version.
Jul 02, 2015, 02:00 AM
It's all about fun!
AuzzieBob's Avatar
Yes a Micro would be cool even though 525mm is getting there!
Received some 3mm depron today to have a go at something lighter.
Fitted a Lemon Rx with stabilizer yesterday and WOW.... what a difference that makes flying on a windy day......also a spinner for looks!

Below are size comparisons between the UMX Beast and Pitts 1-1S......the Pitty out performs both by far for both 3D and slow flight it does everything.....its quite unbelievable how this thing fly’s. (will get a vid up shortly)

Flew it today at the local field.....the guys were amazed how well it tracks and handles the wind..........the big 50cc gasses were grounded but this Pitty was doing 3D as if there were no wind at all! Have had three people offer to buy it as everybody has fallen in love with it especially when they see it fly!

Thanks again slebetman

Cheers Rob
Jul 07, 2015, 11:30 PM
It's all about fun!
AuzzieBob's Avatar
Ok........built the micro version of the Pitty Mod scaled down to 420mm wing span and using 3mm depron rather than 6mm.
Modded plans are attached plus all the info and gear that was used are in the pic descriptions.
We have a indoor coming up on the 15th of this month will get some video and post it up!!

Cheers Rob

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Build Log Shorts Skyvan 24 inch - test flight video gklein Scratchbuilt Indoor and Micro Models 65 May 01, 2011 10:51 AM
Found Cowl from HobbyKing Pitts-EP 42 inch ARF djmoose Aircraft - Electric - Airplanes (FS/W) 2 Apr 04, 2011 11:28 PM
Wanted WTB Herr 24" Pitts plans swapinthedark Aircraft - Electric - Airplanes (FS/W) 1 Mar 30, 2010 02:02 PM
Wanted WTB plans for the Herr 24" Pitts bipe. swapinthedark Aircraft - Electric - Micro & Indoor Airplanes (FS/W) 0 Mar 29, 2010 10:00 PM
Discussion 24, 30, or 35 inch shoestring kit or plans? paulatgis Sport Planes 4 Nov 01, 2009 06:32 PM