gharriso

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  • in reply to: sugested prop for Kaier Facon #36117
    gharrisogharriso
    Participant

    Moderator: Want to go with a prop that folds. Will your spinner for a two bladed prop, work with a folding propeller? If so, a url or part # would be greatly appreciated. Look forward to printing the 2 blade spinner. Thanks for your patience and help. Gerry

    in reply to: sugested prop for Kaier Facon #36105
    gharrisogharriso
    Participant

    To moderator: I thank you for pointing me to the site for the motor data. I found it.

    I have printed out the nose cone pieces. Could you provide me with the url of a vendor that makes a 3 bladed prop and hub that fits those pieces. I would appreciate that very much. Gerry

    in reply to: trouble printing part 12, v_tail_shaft #36104
    gharrisogharriso
    Participant

    Thanks for your help. The problem was I was printing the part upside down. Cura 3.4.1, the latest version, does this by default. You must rotate the part 180 degrees.

    in reply to: sugested prop for Kaier Facon #36046
    gharrisogharriso
    Participant

    Thanks for your reply. 1) I could not find manufacturers data for 2216 1100kv. Data is available for 880, 1250 and 1400.
    2) The comment about electric balance is somewhat confusing to me. Are you suggesting a prony brake type setup to measure the motor torque; using a digital scale to measure the arm you could calculate stall torque. In that case you would tape the motor to the reference ground plane and connect an arm attached to the motor and to the scale. From the scale reading and the length of the string you could calculate Torque. I don’t know how to get thrust from this. Took engineering physics in 1952 and don’t remember them mentioning thrust. I thought thrust was force.
    3) I think the practical answer is order any 9 or 10 inch folding prop I can find that has a hole for a 3.175mm shaft. All the probs I have found so far are for larger diameter shafts.

    Thanks for your help. Any additional comments would be appreciated. Gerry

    in reply to: Need stronger firewalls #25158
    gharrisogharriso
    Participant

    Kevin, I have had a similar experience. I ran up my Qtrainers motor to test it before maiding it and the fire wall shattered. I printed a new one and reinforce the rear with a thin piece of plywood. I used epoxy to bond it to the firewall. It was no easy task, but it did the job. I agree this is a weak point in the design and I think you deserve a comment from the manufacture. I just finished a Cessna 152 and have reved it up at home. So far so good. Will Maiden it next week after the president leaves Florida and we can fly again.Gerry

    in reply to: Motor specified for QTrainer does not fit #18818
    gharrisogharriso
    Participant

    I managed to remove the 2 grub screws and remove the shaft, which is a press fit. It took all day and required either an arbor press or a vise and some improvised fixturing. I don’t know if you can buy the motor in this configuration as HobbyKIng is impossible to contact. I did find a number of tutorials on you tube about reversing motors. I guess no one on this forum has tried it as I got no response? I did get a response when I emailed 3dblabs. It was terse and did not tell me about the problems. Just a hint for those who are suffering the pains of trying to do something new. Some heat will help you get the grub screws out. I use a solder iron or a small torch directly on the screws. Don’t overdo it.

    in reply to: Motor specified for QTrainer does not fit #18682
    gharrisogharriso
    Participant

    drew, Thanks or the reply. Even if I was lucky enough to find a new cowl, I don’t know if I could break the old one off as I glued it to the next body section using CA. If some one verifies that the motor must come apart, the problem comes down to getting the set screws loose. Don’t look forward to that job. In the past it required heat and lots of work. Thanks again for the reply.

    gharrisogharriso
    Participant

    trying to download jpg files

    gharrisogharriso
    Participant

    Sorry, sent wrong files, first time.

    gharrisogharriso
    Participant

    What I did to solve most of my problems: Changed sensor height from 1mm to 0.5mm. and increased pressure on filament feed gear by tightening the two screws on original Prusa i3 MK2 S. After these adjustments I printed entire wing of Qtrainer. Still using G code. Ran into problems with Ailerons. See mew post of 08-02-2017

    in reply to: Help with printing… #17526
    gharrisogharriso
    Participant

    Just built orig. Prusai3 MK2S. Printed a few of their files including a 120mm high vase. All good. Tried to print QTrainer battery holder. It Printed base, approx. 2mm high and then nozzle raised about 40 mm and kept moving but no filament was coming out. Also tried to print QB20 RL6 wing section. Aborted first time after 10 mm high and some strands not sticking together. Next run, set extrusion multiplier 1.05, aborted after about 5mm. More tries but head went up before it should have. Any suggestions would be appreciated. All runs used g code.

Viewing 11 posts - 1 through 11 (of 11 total)