BertKu's Recent Activity

  1. BertKu replied to the thread A strange question.

    Thank you Fallguy, Yes I still have to finish the propellers off. I will grind it during balancing. Thanks, pleased to read, I don't...

    Mar 7, 2021 at 10:12 AM
  2. BertKu liked fallguy's post in the thread A strange question.

    Well, I would not worry about 5mm for low speeds. I assumed your question was geared more toward wave effects and such. The 5mm error...

    Mar 7, 2021 at 10:08 AM
  3. BertKu replied to the thread A strange question.

    Fallquy and all others. I still haven't received a reply whether the two propellers must be parallel. pointing towards inside or other...

    Mar 7, 2021 at 9:07 AM
  4. BertKu replied to the thread A strange question.

    Hi Fallguy, You probably totally right. But probably not at the speed I am going, below 5 knots. I hope I understand you properly, you...

    Mar 7, 2021 at 8:49 AM
  5. BertKu replied to the thread A strange question.

    Gonzo, If you wonder how I balance the prop and check the pop, it is very simple. I have a two point system where between the propeller...

    Mar 7, 2021 at 4:32 AM
  6. BertKu replied to the thread A strange question.

    Hi Gonzo, actual I should have a variable pitch/size propeller, then one can adjust the pitch and the size to the rpm of the motor. But...

    Mar 3, 2021 at 7:07 AM
  7. BertKu replied to the thread A strange question.

    Gonzo, my problem is that Diesel and Petrol engines has a narrower area of torque in the rpm range. While a brushless motor is the...

    Mar 3, 2021 at 1:18 AM
  8. BertKu replied to the thread A strange question.

    Hi Gonzo, No, it does not make sense for me to buy lots of propellers and try to see whether I will go 1/10 knots faster or slower. It...

    Mar 2, 2021 at 12:25 PM
  9. BertKu attached a file to the thread A strange question.

    Hi Keith, here the photo of the 90 degrees bevel gears I made. They are from 316 Stainless steel and in closed with gearbox oil. Also my...

    Bevel Gears.jpg Four blade propeller 2.jpg Four blade propeller 3.jpg Four blade propeller 4.jpg Four blade propeller 5.jpg Mar 2, 2021 at 9:32 AM