PB-2

 

PB-2 - plan thumbnail image

PB-2 - completed model photo more pics (5)

PB-2  
by Thracy Petrides
from Model Airplane News
August 1938 
96in span
Tags: IC F/F Parasol
all formers complete :)
got article :)


Submitted to Outerzone: 13/02/2012
Outerzone planID: oz2423 | Filesize: 317KB | Format: • PDFbitmap | Credit*: theshadow

   

About this Plan

Thracy Petrides old timer of the month, PB-2, reprinted in Model Builder 08-77. Great hints for doing an RC conversion in the included short MB article. Original plan is from MAN Aug 1938.

Quote: - "How to build a Payload Gas Model. Complete plans and instructions to build a ship that will lift three pounds of useful load..."

Direct submission to Outerzone.

Update 12/01/2017: added Model Airplane News article, thanks to RFJ.

Supplementary files

Article.

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User comments

Hi Steve, One terrific site you have. The best time of my life is sitting down with a bottle of scotch in the evenings and browsing through your thousands of plans, never ever get tired of it and keep watching your site for new additions, keeps me going during the day. I built a PB-2 by Thracy Petrides from plans exactly the same as shown on your site. I scaled the plan down from an original 96" inch wingspan to a more manageable 84" wingspan. Wow what a flier, just hung in the sky. I packed up the leading edge by 1/4" of an inch which made the second flight take off less steep but then the PB-2 did not want to come down. Did not time the engine run on the first flight but with a .46 Magnum and a two ounce tank the engine run was short. First flight after the engine died lasted 47 minutes, a first for me. Second flight saw the PB-2 disappearing after the engine quite even at a wingspan of 84" inches. I had pretty severe elevator and rudder movement and even with full down down trim on the elevator the PB-2 just kept climbing. I had concerns, the PB-2 now being in the air for 59 minutes after the engine quite, the charge on the receiver battery pack and light civilian aircraft who have a runway about a kilometre from our field. The only way to keep the PB-2 in sight was to put her into a shallow dive which did reduce the altitude but as I levelled out very gently the rubber bands holding the wings snapped which resulted in total the destruction of: 1 x.46engine; 11x 6 propeller; 3 servos; fuel tank; 1switch harness; 1 receiver; receiver battery pack; 1PB-2. The only things that survived were the wheels, main under carriage wheels and tail wheel. I have included a few pics I hope you can use. I did not build strictly to plan, the original was for weight lifting so I left out the reinforcing diagonals because mine was for soaring and seemed ample strong enough without them. Can't wait to start building MK2, waiting for new engine, receiver battery pack, switch harness, receiver, servos, propellers, fuel tank and some wood to arrive ( thank goodness for online ordering ) and SOME EXTRA RUBBER BANDS. Never ever stop paying school fees. Painful. Kindest regards,
GeorgeKirstein - 15/04/2014
Here are a few photos of my PB-2 electric, wingspan 84" [more pics 005-007]. Beautiful soarer, but also easy to fly exactly where you drive it. Tail very effective. Touch and go very slowly like a dream. Originally I covered it with Oratex Antique, but it was heavy and poor of spirit. Now I have re-covered it with nylon and it is more light. Weight now 2020 gr. ready to fly with battery.
Luigi - 11/01/2017
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Notes

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Scaling

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