Announcement

Collapse
No announcement yet.

Helibug Trex550 Gasser with OS GT15HZ

Collapse
X
Collapse
 
  • Page of 3
  • Filter
  • Time
  • Show
Clear All
new posts
Previous 1 2 3 template Next
  • #1

    Helibug Trex550 Gasser with OS GT15HZ

    i wanted to try the new engine on the smallest possible helicopter...few pics and a couple of test flying vids:
    Specs:
    Trex550
    OS GT15HZ
    6.15 gear ratio
    520mm main blades
    total 8.4 Lbs (US) RTF with 4oz fuel




    http://helibug.com/HF_HBPS04.JPG
    http://helibug.com/HF_HBPS03.JPG
    http://helibug.com/HF_HBPS02.JPG
    http://helibug.com/HF_HBPS01.JPG
    Tags: None
  • #2
    please keep us up to date on how the engine performs
    what fan and duct did you use? does the engine get hot?
    Hirobo Turbulence D3
    a bunch of bls servo's and a 701 gyro
    Powered by an OS91 hz and a MP2
    Winner of the LHC Scale Cup 2011
    1/4 scale Vario Bell 47 G3
    1/3 scale Vario R22
    2012 LHC Scale Cup Judge
    member of save the flybar foundation
    www.alcesterhelicopterclub.bmfa.org
    sigpic

    Comment

    • #3
      Originally posted by electricsceadu View Post
      please keep us up to date on how the engine performs
      what fan and duct did you use? does the engine get hot?
      I am using Trex700 transmission (trex700 clutch, clutch moun,clutch bell, start shaft and shroud)....gearing (main gear/pinion) is specially designed for this helicopter...
      there are no cooling issues on this with this setup...

      Comment

      • #4
        ..get it run in and find someone to give it some Wellie to see what it could do!
        PGK
        450Pro Clone fb, Trex500 fbl beastx, Trex 600N fbl beastx, Trex700N fbl msh brain, Spectra G Hanson 26 3dmax fb, Blitz Avro fb...Futaba 8FG

        Comment

        • #5
          Originally posted by pgkevet View Post
          ..get it run in and find someone to give it some Wellie to see what it could do!
          Thats exactly what the target is
          as you can see, there are two videos....the first one is on my youtube channel..
          from 1st to 3rd, the engine is getting smoother and smoother....

          Comment

          • #6
            Hmmmm very interested will this conversion be available or are you purely experimenting for experimenting a sake?
            Will it need v1 or v2 donor parts or won't it matter etc so many questions
            Donor v1 550 airframe sitting on my shelf at home
            Martin
            Aka RCSlopesurfer

            Comment

            • #7
              Originally posted by LipolyGone View Post
              Hmmmm very interested will this conversion be available or are you purely experimenting for experimenting a sake?
              Will it need v1 or v2 donor parts or won't it matter etc so many questions
              Donor v1 550 airframe sitting on my shelf at home
              dont know yet...many people are asking to manufacture it...it started as my personal project...and till now, i dont have any plans to manufacture it...
              V1 or V2 dont matter....i am using V1 on it....

              Comment

              • #8
                I would queak the tail, before it shakes boom off
                Santander Factory Team

                Proud wearer of 5 x EGS

                Comment

                • #9
                  Originally posted by GIXERMAN View Post
                  I would queak the tail, before it shakes boom off
                  tail shaking is settling down....if you look at the first video (on my channel) it was worrrrrrrrrse !
                  more fuel through it, properly break in the engine and it will get even smoother....

                  its a brand new engine with only 12oz fuel used in total of three flights.

                  Comment

                  • #10
                    Well I'd be interested in buying a kit of parts to convert my 550.
                    Martin
                    Aka RCSlopesurfer

                    Comment

                    • #11
                      fully redesigned frames and now with reduced weight.

                      Here, at 7.93 Lbs (US) RTF !

                      Comment

                      • #12
                        Nice work! What kind of flight times can you get out of it?
                        Matt

                        Comment

                        • #13
                          Thank you....
                          its approx. 1 minute / 10cc of patrol

                          Comment

                          • #14
                            some changes done on the model:
                            - Replaced the main gear/pinion and tweaked the gear ratio a little bit more
                            - Power band is also updated due to main gear/pinion change
                            - Engine runs much happier and feels loaded.
                            - Now, using pinion bearing block from Trex700-N V2 with double bearings on the pinion
                            - Machined new side frames with 3.17mm (1/8") thick material


                            I feel that it was necessary to use thicker side frames...now the models absorbs vibrations much better then before..weight is also increased a little due to increase in thickness so back to almost 8.3 Lbs....but, its 100% worth....i know lighter is better, but, i like it vibration free, smooth AND lighter


                            Heli feels much better now - Engine sounds much smoother and consistent:
                            +/- 7 degree pitch (no loss of RPM)
                            520mm main blades
                            Engine is running at ~12500 RPM
                            (I need to change tail gyro on this model which i will in the next couple of days...i am still running Align GP750 - not one of my favorite)


                            please check the video....specially after 1:30

                            Comment

                            • #15
                              What happened after 1.30 then ? Surely be better to get a flight in down your local club
                              Santander Factory Team

                              Proud wearer of 5 x EGS

                              Comment

                              Previous 1 2 3 template Next
                              Working...
                              X