Description

PittsBull: 30-Inch EPP Super Lite Biplane

Inspired by the full-scale Pitts Model 12, the Hacker Models PittsBull was purpose-built for extreme 3D and freestyle performance rather than scale flight. Its lightweight biplane design combines exceptional maneuverability with the durability needed for regular indoor and outdoor aerobatic flying.

Large control surfaces, dual aileron servos, and a full-flying elevator with up to 90 degrees of movement provide outstanding control authority. The PittsBull excels at axial rolls, rolling circles, torque rolls, hovering, tumbling maneuvers, and other aggressive aerobatics while remaining surprisingly controlled at slower speeds.

Key Features

Purpose-built for advanced 3D and freestyle aerobatics
Lightweight and durable printed EPP biplane construction
Extensive carbon-fiber reinforcement for strength and rigidity
Full-flying elevator provides extreme control movement and tight rotations
Dual aileron servos provide precise and powerful roll control
Large control surfaces for hovering, torque rolls, tumbling, and rolling maneuvers
Designed for indoor flying but also performs well outdoors in suitable conditions
Compatible with standard 3D and optional reversible 4D power systems

Specifications

Wingspan: 30 inches
Length: 33 inches
Estimated Flying Weight: Approximately 6.7 oz / 190 g depending on battery and equipment selection
Construction: Lightweight printed EPP foam with carbon-fiber reinforcement
Standard Battery: 2S 450 mAh LiPo
Pilot Level: Intermediate to Advanced
Flying Environment: Indoor facilities or suitable outdoor conditions

Required to Complete

This is an airframe kit. The recommended power systems and additional required items are sold separately and listed below. No printed manual is included; a downloadable PDF build manual is available under Build Resources below.

Recommended Matched Power Systems

View the PC21 Standard 3D Power System

The PC21 is our standard lightweight 2S setup for dependable power, precise control, and balanced 3D performance.

View the Optional 3D/4D Competition Power System

The competition system provides additional power and switchable reversible thrust for experienced pilots who want full 4D capability.

PC21 Standard Power-System Components

Motor: CSP 2203 1800KV brushless motor
ESC: BOLT 16A ESC
Servos: Four CSP-D6M digital metal-gear servos
Propeller: GWS 8 x 4 direct-drive propeller

Optional 3D/4D Competition Components

Motor: Vertex VS28-05C 1950KV 3D/4D motor
ESC: Vertex 17A switchable 3D/4D reversible ESC
Servo Options: Four CSP-D6M digital metal-gear servos or four Vertex VX-SV10D metal-case servos
4D Propeller: APC 8 x 3.7 SFR reversible propeller
3D Propeller: APC 8 x 4.1 slow-fly or compatible 8 x 4 direct-drive propeller

Recommended Power Setup

Standard PC21 Setup: 2S 450 mAh LiPo with the included GWS 8 x 4 propeller
3D/4D Competition Setup: 2S or 3S 600 mAh LiPo with the appropriate included 3D or 4D propeller

Additional Required Items

Radio System: 4-channel or greater transmitter and a compatible lightweight receiver
Battery: Compatible 2S or 3S LiPo battery for the selected power system
Charger: LiPo-compatible balance charger
Adhesives: Foam-Tac, thin CA, and medium CA glue

Build Resources, Upgrades and Compatible Parts

We recommend Foam-Tac for the main EPP assembly and thin or medium CA glue where specified for carbon-fiber reinforcement and hardware connections.

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Videos

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4 Reviews

5
This plane is sick!

Posted by Eric on Jan 19th 2024

Took a little while to get together but wasn't too hard. A fun satisfying build. This plane flies amazing. It's phenomenal on high rates. Nearly 90 degree throws. It'll do whatever you want and stop on a dime. I was worried it would be twitchy and hard to control. Not at all. I started low rates then quickly realized high rates should be no worry. It's extremely maneuverable and precise. It's well capable beyond my skills and I don't foresee ever getting bored with it.
4
HM 30" EPP PITTSBULL 4.5 *

Posted by bill G on May 5th 2019

I personally am not a fan of EPP and much prefer depron for 3D/Freestyle indoor gymnasium flight. However I understand the move by almost all manufacturers to EPP. Its flexible and withstands more crashes then the average pilots skills usually has in a gym. Therefore he is happier with the product. That being said because EPP is flexible it usually does not fly as well as the stiffer lighter depron, although it is more crash resistant as noted above. In the quest to make EPP lighter, thinner 3/4 mm stock is being used as opposed to originally being built out of 6mm EPP stock. To stiffen the thinner 3MM EPP more carbon fiber rod supports are needed to keep the plane from being TOO flexible in flight. So this is the tradeoff. This plane is no exception. That being said for an EPP plane (especially a bi-plane) it flies very well. The Elevator build is slightly complicated but superior to other manufacturers end results. The plane flies well, this is a Freestyle tumbler, not a F3P flier. It wants to do axial rolls and rolling circles, it wants to torque roll without the pilot barely trying. What this adds up to is a very fun (mostly indoor) airplane that can take a little beating on the fuselage since its EPP, although you might be re-glueing some struts if you are of intermediate flying skills. All in all I really like this plane, its so much fun to fly. It likes to fly fast, but can fly slow when needed, thanks to the Elevator throws and relative low AUW weight. There are videobuild instructions on youtube, which I found very helpful. The manual pictures are black and white and too small, this is a slower, complex build but not overly complicated. I highly recommend this plane for average toadvanced 3D pilots.
5
HM 30" EPP PITTSBULL (IN-DOOR) RED

Posted by James Winn on Dec 28th 2018

I have had over a dozen 3D profile foamies and flown many others. This little plane out performs all the rest. The massive control surfaces and high thrust of the little motor on 3S results in instant response to stick and throttle inputs. Tons of fun to fly!!! Here is a recent video: https://www.youtube.com/watch?v=6PriyLHl-iY
5
PittsBull

Posted by Troy on Dec 15th 2018

Flies awesome! Very nice feel, rolling harriers and knife edge is crazy fun