Thoughts from the workbench of Radical RC. The online retailer of electronics and kits for radio control aircraft. Dave Thacker shares his thoughts and knowledge of electronics, batteries, kit design and overall enjoyment of the hobby.
Steve’s built a beautiful 1905. He has added some scale detail including flying wires and pilot.
We can clearly see a pilot capable of flying this model right in it’s sweetest spot, low and slow.
I was at our local field last week, and one of the guys took 60 some jpg’s of the Flyer. Some turned out excellent…! I did a low and slow fly by (didn’t think it was quite that low!) and he caught the whole sequence. I also really like the turn down wind… Use any that you might like.
A customer asking about an unusual cell size of ours asks: “Are they are low self discharge?”
They are not Eneloops which would be the only NiMH I would classify as Low self discharge. This is almost a silly thing to consider because we come off the charger and go to the field in this hobby. We do not charge a battery, then start a 1 week hike at the end of which we fly the model. That specification makes sense for a flashlight or an emergency radio, not an RC aircraft. Others may have a different view. I don’t fly unless I’m coming off a fresh charge at the beginning of the day. Other systems are to the choice of the users but reckless in my view. Yet I offer the Eneloops for those seeking this value. There are no Eneloops this small. Also, I don’t like the Eneloop under fast charge “ever” conditions.
For RC, lets go over how silly this is;
Standard self discharge x 2 would be only 2% per day.
After charging, if we let a 500mah pack set for 2 days before flying, it would lose (500x.01) 10mah the first day, (490 x .01) 9.8mah the second day. Value at end of 2 days 500-10-9.8=480.2mah. 19.8ma lost over 48 hours or about .416mah per hour dissipated.
If we come off the charger and go to the field, a trip that takes 2 hours, the same rate of loss would mean our pack would be about 499mah since we loose about .416mah per hour.
So, perhaps, a low discharge pack is good for about a .2% advantage when you get to the field. And, to come up with that .2% I had to exaggerate the loss by double and suggest a very long trip to the flying field.
This is why this specification is essentially moot when it comes to normal day in and day out use of receiver packs in RC aircraft. Is it better? We’ll yes in some microscopic way, but to get it, what are you going to have to do? Accept an Eneloop you can never fast charge? Use a non-Sanyo cell? I see a lot of effort hunting something that has no real measurable benefit in our application.
It’s more arguable in a TX battery because we often use that battery over a number of weeks between charges.
Hey Dave. I just wanted to let you know that I am very happy with my shipment. It was the charging cable for JR/Spektrum batteries. It was not only packed incredibly well, but it got here in just a few days for only $3 in shipping. Thank you very much and I can honestly say I do plan on doing business with you again as well as recommending you to all of the guys in the RC club! I hope you have many great days ahead of you 🙂
Attached is a photo of a B-17 making a flyby over Wright Field. I think the shadow is about where your building’s located. Notice Huffman Dam and the train heading towards Fairborn on the old Big 4 RR.
Show this to Richard. He stopped by my tables at the Hara Arena Train Show a couple of weeks ago and I told him about this picture.
My favorite BBC presenter is James May of Top Gear fame. He has several series if you wish to look them up. In this episode they race the Germans over a 10 mile course between two cities that at one time were connected with rail service. Lots of interesting contraptions, RC, Glow Engines, Lipo’s, the logic of how they powered the rails and etc… An interesting show touching on many topics any modeler would appreciate.
I recently purchased the Verti-Go 125 kit and I have got to say that is the best kit that I have ever built. The ease and speed of putting the kit together is amazing. I had the entire kit framed up before I ever pulled my glue out.I just wanted to say ” Job Well Done “. I built the plane over a couple of days all together in between being on call as a tow truck driver.
The following photo and description is from Frank Beafore of Select Tech GeoSpatial. Frank has become a modeling enthusiast and UAV manufacturer as well. It appears to be an example of the first ever electric powered RC helicopter that was manufactured for general sale to the public. It’s an interesting unit. If you know more about it or the history of hobbiest early electric helicopters, please stick in a comment.
Attached is a photo of the first electric RC helicopter offered to model builders back in 1981. It was manufactured by Ishimasa Co, LTD, Tokyo. It used NiCad batteries with less than a 2 min. flight time. To train on it, you needed a 25 foot umbilical to supply current to keep it going. The tail rotor was coupled to the main drive via a fragile rubber belt that broke in mid flight. I do not think that it was 3-D capable.
I was lucky to get all the spare parts and the original instructions.
Cheers – FB
Below is a link to a website dedicated to Vintage RC Helicopters with lot’s of photo’s of this kit.
Thanks again for your great customer service I really appreciate it. Take a look at how I used your hangers to get a bunch of planes in a spot that wasn’t being used at all. Thanks for designing such a great product!
Feel free to share with others.
This is a photo of the finished setup hanging in un-used space over a stairwell. View from 2nd floor, the models are over the treads at the bottom of the stairway. what is the rope thingie in that photo?
Fastened to the header above the second floor stairwell entrance is a pulley and 2 common rope cleats. A simple way to raise and lower his fleet!
Here is a shot of the rack lowered to the first floor, ready to for another mission into enemy territory!
Thanks Dave for the photo’s of your setup. 7 Planes all stored in unused space and wherever they were is free’d up. Perfect.