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Author Topic: RPG Autogyro Build from plan  (Read 16080 times)

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Offline autogyroandy

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RPG Autogyro Build from plan
« on: January 31, 2010, 15:23:06 PM »
So for all you chaps that may be intersested here is my build thread for the RPG, Richard's designed electric pusher.

Just a few pictures to start, these show the build over the Christmas holidays.

I had a bit of a problem with the mast, so I made a second.. :)

Andy

Offline Rich Harris

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Re: RPG Autogyro Build from plan
« Reply #1 on: January 31, 2010, 17:50:20 PM »
Andy,
              Are you sticking with the piano wire UC or going with the alloy version? If you choose to have a steerable nose wheel I used a steerable tail wheel, removed the plastic mount and fabricated an alloy one up.


                Rich

Offline autogyroandy

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Re: RPG Autogyro Build from plan
« Reply #2 on: January 31, 2010, 19:36:01 PM »
Andy,
              Are you sticking with the piano wire UC or going with the alloy version? If you choose to have a steerable nose wheel I used a steerable tail wheel, removed the plastic mount and fabricated an alloy one up.


                Rich

Hi Rich

I went to WH Smith today and guess what I got.. The 'Quiet & Electric Flight International'. There is no free plan, but a good 6 page 'Plan Feature'.
I noticed the plan is different to mine so it must have updates, is that correct Rich?

Yes, I was just hunting in the garage for some alloy today, and as luck would have it, I found some.  :)
 but not sure its good enough. ??? Might have to use wire. ???

I like the idea of the steerable nose wheel, but with the small space on the nose it may be a challenge. However I like a challenge.  :)

Rich I was looking at my mast and she is still slightly off  :embarassed: The gimble does not line up with the nose exactly, if you get what i mean.

A few more pictures..

Offline Rich Harris

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Re: RPG Autogyro Build from plan
« Reply #3 on: January 31, 2010, 20:11:55 PM »
Andy,
          Just before you attach the 3mm balsa sides to the mast, twist the mast so that it is inline and then glue the balsa facings in place. It should hold it square :af This is why its best to go with the lite ply as it all squares up as the fuselage is complete ;)
          It should'nt matter if its out anyway....but I would probably take the Mick when we meet up again :nananana:
           I used 3mm thick Duraluminium on one of mine and it worked well, after a hard landing :'' you can just re bend it back



                    Rich

Offline Rich Harris

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Re: RPG Autogyro Build from plan
« Reply #4 on: January 31, 2010, 20:15:35 PM »
Andy,
           If you thicken up under the Chassis at the nose to give a more curved shape you could probably get a servo for the nose wheel into it it without the base of the servo sticking to far into the fuselage?

     Yes there were a few updates made to the plan :D

        No free plan though as the pages were too big!!


                                             Rich

Offline autogyroandy

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Re: RPG Autogyro Build from plan
« Reply #5 on: February 01, 2010, 13:05:13 PM »
Andy,
                    It should'nt matter if its out anyway....but I would probably take the Mick when we meet up again

                    Rich

Thanks mate, as if I need more mick taking.. ;D

When are you coming down, or is it up, to my town to do some flying?  :)

Andy

Offline Rich Harris

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Re: RPG Autogyro Build from plan
« Reply #6 on: February 01, 2010, 14:52:12 PM »
Andy,
          When it gets warmer and lighter at night :af


                                                                              Rich

Offline Rich Harris

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Re: RPG Autogyro Build from plan
« Reply #7 on: February 05, 2010, 17:04:04 PM »
Hows it going Andy? got her covered yet?? :D

Offline autogyroandy

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Re: RPG Autogyro Build from plan
« Reply #8 on: February 06, 2010, 00:26:31 AM »
Hows it going Andy? got her covered yet?? :D

No sorry Rich.  I have yet to find some aluminium for the under carrage. ???

However my motor and 80Amp ESC have arrived from ebay item 300357276058 ;D
No instructions to set the low voltage. Will they have a programming card I wonder!

Andy

Offline Rich Harris

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Re: RPG Autogyro Build from plan
« Reply #9 on: February 06, 2010, 10:34:17 AM »
Andy,
           You worry too much :)..the esc will recognise your cell count. just plug it in and go :af  I thought you had found some alloy sheet $%&
            You could always make up a piano wire version like a conventional tail dragger fixed wing, then do away with the uprights.


                             Rich

Offline autogyroandy

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Re: RPG Autogyro Build from plan
« Reply #10 on: February 12, 2010, 23:13:17 PM »
Just been testing my new motor and speed controller.. lots of fun :ev, should have tested it in the garden but its too cold, so it was a bit noisy in the house ;D and a bit windy

3 cell lipo 3000mAh pack....

APC 15x6 prop = 339Wp 31.7Amps 2.4Wh

APC 12x8 prop = 256Wp 23.5Amps 0.9Wh

Will this be enough? I am planning to use a 13x8 prop.

Yes your right Rich I do worry too much.. :). The aloy sheet was too thin so no good. I expect I will make some wire version.

I have been distracted; been testing my PT25.. :af
« Last Edit: February 12, 2010, 23:21:41 PM by autogyroandy »

Offline Rich Harris

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Re: RPG Autogyro Build from plan
« Reply #11 on: February 14, 2010, 13:36:43 PM »
Andy,
                A 13 x 8 should be fine, try giantcod for some cheap APC copies. Looking forward to seeing the motor mounted mate :af

               Still not done anymore with my PT-25 but those evenings are getting lighter and lighter ;) another month and will have to sort out a flying day either down your end or up here?
               If anyone else is interested in coming up to my filed for a day of gyro flying you are more than welcome, BMFA insurance is a must!

                       Rich

Offline autogyroandy

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Re: RPG Autogyro Build from plan
« Reply #12 on: February 15, 2010, 21:37:53 PM »

That would be fun, thank you Rich.

Offline PeterO

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Re: RPG Autogyro Build from plan
« Reply #13 on: February 16, 2010, 10:09:11 AM »
Have "we" been invited to the Rotary Eagles event again this year ?
PeterO

Offline Rich Harris

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Re: RPG Autogyro Build from plan
« Reply #14 on: February 16, 2010, 16:47:48 PM »
Peter,
            Yes we have, the organisers will contact me with the dates but it will more than likely be around the same time. I was only watching your minimum flight on my pc yesterday :af


                      Rich

Offline PeterO

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Re: RPG Autogyro Build from plan
« Reply #15 on: February 16, 2010, 16:52:11 PM »
Peter,
            Yes we have,
Great!  That was a really good day last year. 
Quote
the organisers will contact me with the dates but it will more than likely be around the same time. I was only watching your minimum flight on my pc yesterday :af
Rich
Lots of circuits and touch and goes if I remember rightly ?
PeterO

Offline Rich Harris

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Re: RPG Autogyro Build from plan
« Reply #16 on: February 16, 2010, 16:59:01 PM »
Yes!! ;)

              Heres you and the 'Min'

             
Small | Large


 
              Andy with his Kellett :'(

             
             
Small | Large


             
              And Chas with his RPG


             
      YouTube
            - Pusher autogyros by Chaz
   
(Embedding disabled, limit reached)

             All taken at Charlton Park last year...what a hot day it was :co



                         Rich

       

Offline autogyroandy

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Re: RPG Autogyro Build from plan
« Reply #17 on: February 16, 2010, 21:21:39 PM »

Good to see my home in the video,  :uk:  ;D ;D

I like the flying Peer, very smooth landings.

Thanks Rich, the videos say more about this model than I could put into words.
I just hope mine will be as good!

Andy

Offline Shep

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Re: RPG Autogyro Build from plan
« Reply #18 on: February 18, 2010, 18:58:14 PM »
Hi

Good to see a design for a practical Autogyro

I have just ordered the plan and the gearbox in the attachment as I had trouble getting a master airscrew box.For the motor i am looking to use an E-Power 2826 950KV 45A from Giant Cod.What do you think?

Steve

Offline autogyroandy

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Re: RPG Autogyro Build from plan
« Reply #19 on: February 18, 2010, 21:28:08 PM »
Hi
Good to see a design for a practical Autogyro
I have just ordered the plan and the gearbox in the attachment as I had trouble getting a master airscrew box.For the motor i am looking to use an E-Power 2826 950KV 45A from Giant Cod.What do you think?
Steve

Hi Steve, welcome to the thread.

 Thats the exact gearbox I have used on my Profile Kellet and will use the same on the RPG.  :)

I used long 3.5mm screws and these went right through the top and bottom steel plates and the wood ply on the model. Also I added some spacers to the gearbox to stop the screws from deforming the steel sides when tighered.
Then thread-lock to the nuts to stop the screws getting loose.

The motor sounds good, but Rich would know for sure.

Andy
« Last Edit: February 18, 2010, 21:33:41 PM by autogyroandy »

Offline Rich Harris

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Re: RPG Autogyro Build from plan
« Reply #20 on: February 18, 2010, 22:25:00 PM »
Steve,
                  That set up will work fine :af..I have a couple of friends who have used these motors and they work well.

      Here is a video of one of my friends models flying with that motor fitted, he has added his own prerotator to his to shorten the take off runs also.



                     
Small | Large





                                  Rich

Offline Rich Harris

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Re: RPG Autogyro Build from plan
« Reply #21 on: February 18, 2010, 22:36:11 PM »
Just to let you know also I can get CNC part kits cut for the RPG, they generally take about a week to get hold of. They include all of the lite ply/ Birch ply parts for the fuselage and head so give the builder a good head start.


                                     Rich

Offline Shep

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Re: RPG Autogyro Build from plan
« Reply #22 on: February 19, 2010, 13:35:19 PM »
Thanks Rich,how much is the CNC kit?

Steve

Offline autogyroandy

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Re: RPG Autogyro Build from plan
« Reply #23 on: February 22, 2010, 17:53:31 PM »
Thanks Rich,how much is the CNC kit?

Steve

Hi Steve

Good to know you are going to build an RPG,  :)

You can add pictures and items to this thread, or start a build thread of your own, I don't mind.

Andy

Offline Shep

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Re: RPG Autogyro Build from plan
« Reply #24 on: March 05, 2010, 20:47:13 PM »
Hi Rich /Andy

Just started the build from the CNC parts which has saved loads of time.
I have glued up the front,rear and centre of the mast.The tops are all different lenghts, the rear is long and the front is short.Is this critical or can I just sand the rear to match the centre and add a piece to the front when the head pivot ?

Steve 

Offline autogyroandy

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Re: RPG Autogyro Build from plan
« Reply #25 on: March 06, 2010, 22:07:03 PM »
Hi Rich /Andy
Just started the build from the CNC parts which has saved loads of time.
I have glued up the front,rear and centre of the mast.The tops are all different lenghts, the rear is long and the front is short.Is this critical or can I just sand the rear to match the centre and add a piece to the front when the head pivot ?  Steve 

Hi Steve
I had the same issue.

Using the side profile of the two plans, it's scale is 1-1;
   Measure the front and rear mast sides. Mark these dimensions onto the ply of the mast. Then cut the excess off. This is the best way and then you will get the correct angle for the head.

Did you get a twist in your mast? I did and had to rebuild it.  :embarassed:

Also the wheels can be mounted onto aluminium or using the plan design of wire, but the rear wheels need to finish as shown on the side elevation.
I have been told its best to have a steering front wheel and that has added a challenge to my build. :)

Andy

Offline Shep

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Re: RPG Autogyro Build from plan
« Reply #26 on: March 06, 2010, 22:48:13 PM »
Thanks Andy
At the moment I have just trimmed the rear sheet to match the centre so the datum should be the same as designed,I'll check tomorrow before gluing on the head.I just need to add a packer to the front. My mast is straight and square-used thin cyano and a set square on the bench to assemble.

I am planning on using a steerable tailwheel from GC mounted backwards.I bought it for another model but it looks ok . I just need to work out where to put the servo.I am thinking of using a standard servo fitted underneath the fuselage just in front of the mast to drive the nosewheel and rudder

Should have the mast and fuselage assembled tomorrow

Steve

Offline Rich Harris

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Re: RPG Autogyro Build from plan
« Reply #27 on: March 07, 2010, 12:05:39 PM »
Steve,
              Yes the front and back formers are a little different but they should sand to the plan height. I have used a steerable nose wheel on some of mine using a tail wheel. It works well but I managed to break the plastic mount, I made one up with duraluminium and never had a problem after that :af
               My servo was mounted from underneath fairly close to the nose, you will probably need a mini MG servo as this will help to get the battery in and with the constant hammering helps with not stripping teeth in your servo!
               I found it easier to mark all my former positions and centre lines before assembly, even if the lite ply is warped it pulls square on final assembly.


                      Rich

Offline Shep

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Re: RPG Autogyro Build from plan
« Reply #28 on: March 23, 2010, 10:56:24 AM »
Andy/Rich

My build has moved on well.Starting on the blades and wire bending for the undercarriage(not my favoourite job).I am having trouble sourcing the G 10 board for the blade hub any ideas?
I bought a fibreglass PCB from Maplins but it is not big enough .

I'll upload some photos when I get chance

Steve

Offline Andy Sayle

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Re: RPG Autogyro Build from plan
« Reply #29 on: March 23, 2010, 11:51:52 AM »
Not sure exactly what size you need, but I saw an advert for these chaps in the BMFA News I think:  Epoxy Glass (G10/FR4)

Andy
I can fix anything in the whole world, for I am armed with two rolls of Duct tape, and a rather large Hammer....

Offline Rich Harris

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Re: RPG Autogyro Build from plan
« Reply #30 on: March 23, 2010, 14:24:50 PM »
Steve,
               Yep that will do fine :af..I use the stuff from Maplins and have not had any problems. You could always go for an alloy landing gear at the rear to save all the bending. The reason for the wire is that most people can get hold of this, the prototype uses an alloy UC.

                            Andy must surely have completed his now, hes had the kit for 7 months  :'' :study:


                                                          Rich

Offline Shep

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Re: RPG Autogyro Build from plan
« Reply #31 on: April 14, 2010, 18:33:27 PM »
Rich

I have now got the epoxy board from Maplins, still working on the undercarriage.I have ramin for the blades but it is 6mm thick.Is the 1mm ply for strength or to make up the thickness to 6mm.
Have you seen the new wooden blades from J Perkins?.15 a pair but they are semi symetrical so I am not sure if these would perform as presumably the headspeed would need to be higher to get the same lift.

J Perkins Distribution blades - Main and Tail

Steve

Offline Rich Harris

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Re: RPG Autogyro Build from plan
« Reply #32 on: April 14, 2010, 23:16:49 PM »
Steve,
                 There are 3 reasons why I use 5mm Ramin and face it with birch ply. The first is because I can only get 5mm thick from the local shop and build it up to 6mm. The second is to add strength and the third is to help with getting the CG forwards.
                 However I have tried Ramin only  LE  blades and these worked fine, the CG was back a touch more but I just moved the mount hole to suit :af
                 One bit of advice is to make a few extra blades up as spares ;)...dont ask me why! :D

                                            Rich

Offline Ripon

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Re: RPG Autogyro Build from plan
« Reply #33 on: April 22, 2010, 13:07:08 PM »
I've just sent off for the plans and as gearboxes seem hard to get hold of I was thinking of putting the bearings into the triangular rotor plate - not sure whether to use one or two bearings though.  I do have a lathe and this seems to me to be easier than making up a rotating shaft.  Any comments?
John   

Offline PeterO

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Re: RPG Autogyro Build from plan
« Reply #34 on: April 22, 2010, 13:17:42 PM »
I've just sent off for the plans and as gearboxes seem hard to get hold of I was thinking of putting the bearings into the triangular rotor plate - not sure whether to use one or two bearings though.  I do have a lathe and this seems to me to be easier than making up a rotating shaft.  Any comments?
John   

You could take a look at my Minimum build page.  The Minimum uses a two part triangular ply structure to sandwich a gf hinge, but the same construction could be adapted to mount the bearings onto the triangular gf blade mount that RIch uses.
Minimum Build
PeterO


Offline Rich Harris

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Re: RPG Autogyro Build from plan
« Reply #35 on: April 22, 2010, 17:23:50 PM »
John,
            Gearboxes that will suit are readily available through Giancod, I think that they would be fine


                B28 Gradient gear box


                             Rich

Offline Ripon

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Re: RPG Autogyro Build from plan
« Reply #36 on: April 22, 2010, 19:26:31 PM »
Thanks Peter & Rich - two ideas to work on!
John

Offline jeffstu

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Re: RPG Autogyro Build from plan
« Reply #37 on: June 23, 2011, 17:54:24 PM »
i am just starting to build the RPG autogyro and got the drawings from Traplet and also waiting for laser cut parts to arrive.
found problem with traplet drawing,regarding the rear part of fuselarge behind the mast,where the two fuselarge sides are drawn in,this did not match the bottom  keel part.
however i contacted traplet and it has now been sorted on drawings and laser cut parts.
i am using a XYH42-50 800kv 43a brushless motor,1x DYS0207 mini servo for rudder metal gears,2x dys0213 metal gear standard servos,Turnigy Sentry 60a esc,the gearbox i had to get from HobbyKing as GiantCod were out of stock.
i will be building more or less as per drawings but adding a min camcorder in the mast just below the head gimble assy,and adding wheel spats from GiantCod,once i start building i will post pictures etc,
i am also looking at doing a scaled up version probley 1/2 size again
regards Jeff

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Re: RPG Autogyro Build from plan
« Reply #38 on: February 08, 2012, 17:19:36 PM »
Hi I just wondered how the RPG build went/was going?

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Re: RPG Autogyro Build from plan
« Reply #39 on: February 12, 2012, 17:03:02 PM »
I have taken the plunge and ordered the plan & wood pack from Traplet.  Whilst I am waiting for it to arrive I have started to assemble all the other bits and bobs needed.  I have several questions : 
1) are the blades from AeroBalsa more efficient than home made?
2) any info on a UK supplier of a gearbox would be appreciated as Giant Cod no longer supply gearboxes.
3) Rich, where did you get the pilot in the magazine build review model from?
and one technical question:  Does "negative" pitch on the blades mean the same as it would do on a heli?  In other words, leading edge lower than trailing edge?  If so how does that create lift?
Tim

 

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