"Upcycling" Tiger Trainer 40 kit

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    • #4504
      Graham Rousell
      Participant

      Hi All, my first post on here having recently joined you all. As I have mentioned to a few of you, I was gifted a Tiger Trainer 40 kit some while ago, complete with FM RF and Glowplug engine (probably bought originally in the late 80’s early 90’s). The intention is to convert it to electric motor and 2.4GHz (from the 35MHz set included) I’ve finally got around to starting assembly of the model, and have reached the point of locating servos. I should also point out that I already have a JR radio system with my foamy glider, so I’m anticipating either this or a Spectrum transmitter would be used with the Tiger Trainer in the future.
      So now I have some questions….
      1. I was wondering whether the servos within the Hitec Focus4 fm radio set (provided) should be used with this model, or I should get some up to date servos, compatible with the JR/Spectrum. I saw mixed advice on the web in this respect.
      2. The Hitec Focus radio set is complete, therefore would it make more sense in any case to sell it on ebay as such and just get new servos in any case?
      3. And then there is the unused glowplug engine and parts… do these still sell (ebay or other), or is it only good as a paperweight these days?

      More questions to follow I’m sure, but if you could help me with these for now it would be greatly appreciated.

      Regards,

      Graham

    • #4505
      Paul Morris
      Participant

      What are the servos eg futaba, hitec, sanwa etc
      Ordinary hitec servo’s HS311 should be ample for that model
      why not get another receiver for your jr set
      most glow plug engines sell for a pittance on ebay so try the BMFA web site
      regards
      Paul M

      • #4506
        Graham Rousell
        Participant

        Hi Paul,
        Thanks for responding.
        The servos are Hitec HS-300 (Standard). I have four of them. When I looked at the spec I can see two voltages 4.8V: 0.19 sec/60° & 6.0V: 0.15 sec/60°, so how do I know which I have, or can they run from either voltage?
        I may already have another JR receiver, I’ll check, otherwise if you think they can work together that seems a good plan.
        I’ll look on the BMFA site regarding the glowplug.. many thanks.
        Best regards,
        Graham.

    • #4507
      Paul Morris
      Participant

      Those servo’s should be ok
      With regard to the two voltages those servo’s run on both what you normally find is at 4.8v they have a slower time and less torque than if they are running on 6.0v
      How old are these servo’s???
      If in doubt change them for hitec HS311 as they are £37-00 for 4 from the servo shop
      maybe cheaper at other retailers???
      Regards

      Paul

    • #4508
      Graham Rousell
      Participant

      Hi Paul,
      I originally thought the servos were from the early 90’s, however on the box a label shows PN 14235 1999.11, so we might assume 1999!

      I also took a look to the receiver modules I have that came along with the JR transmitter (aside from the one in my foamy glider).
      1 x RG631B (with a connected RA01L),
      1 x RG 411B
      The 631B has two antenna wires, and one more on the RA01L (whatever this is… telemetry??). The RG411B has no antenna connected.
      I shall also need to consider the electric motor and ESC.

      All considered, I wonder if it’s even worth bothering with the servos in the kit and I should just go for new ones as you suggested. £10.00 each sounds like it not being worth the risk to keep the old ones.
      I shall then consider ebay for the Hitec FM 35MHz set complete.
      Any advice on the receivers I have?
      … and what about the electric motor and ESC… I had heard there was a recommended site to spec this out? The Glow Engine I have currently is an SC 40A 6.64cc (unused, still in original box), with a 10×6 Prop. I see what you mean by the prices on ebay!

      Sorry for so many questions, but I’ve already learnt a lot from you so many thanks for your time.
      Graham.

    • #4509
      Paul Morris
      Participant

      Hi Graham
      The rg631b receiver has a satellite receiver connected to it and is full range with telemetry that’s why 2 antenna’s on the main receiver and only one on the satellite
      The rg411b has telemetry but is classed as a park flyer receiver hence no antenna
      As for servo’s like you say those are 20 years old so new would be the best bet at that price

      Regards

      Paul

    • #4510
      Graham Rousell
      Participant

      Many thanks again Paul.
      RG411b it is then and new servos.
      Best regards,
      Graham.

    • #4511
      Paul Morris
      Participant

      Hi Graham
      No you need the rg631b as this is full range
      The rg411b is only classed as a park flyer which is not full range
      Electric motor and esc you need the equivalent of an sc40 which you should be able to find on the interwebby thing

      Regards

      Paul

    • #4512
      Graham Rousell
      Participant

      Aaah thanks again Paul. I must admit I thought I also had an RG411 also in my foamy, but more likely I’m mistaken in that case. I’ll check this out but aim to use the RG631 in any case.
      Some work to do at my side, but it seems I’m better armed now. Many thanks.

    • #4513
      Paul Morris
      Participant

      As for the electric motor work on 100 watts per pound and you will not be far out
      eg 4lb model requires 400 watt motor and then you can work out what esc you need I would suspect about 60 amps
      Regards
      Paul

    • #4514
      Graham Rousell
      Participant

      Thanks for this info Paul. It seems I may have more work to do than I imagined….
      I checked my Parkzone Foamy glider and it did indeed have the RG411 inside. I’m now quite amazed that it never got lost up to now, given the fact it was being rapidly taken up by the thermals around the field. Given this info I think I need to upgrade that receiver to a full-range, and consider the Pilot trainer conversion further (in the initial training sessions I’m sure the “park flyer” receiver could be sufficient).

      On an aside I’ve also seen that JR receivers seem quite expensive to get in this country, although some much cheaper ones quote compatibility with both Spektrum and JR…. though I would risk that route with my limited knowledge. Maybe I shall be changing to Spektrum gear in the near future.

      I’ve learnt a lot in these chats, for which I thank you. Suitably armed I shall plod on with the build/conversion and consider a radio change in the future.

      Best regards,

      Graham.

    • #4515
      Paul Morris
      Participant

      If you have the RG411 in your parkzone glider and its been in thermals then perhaps the info about that receiver is a bit miss leading
      but in a bigger heavier model i would still go with the RG631 as it has basically dual receivers eg: main and satellite

      Regards

      Paul

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