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| Electric Jets Discuss electric jets in Canada. |
Topic Review (Newest First)
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| 10-14-2023 09:06 PM | ||
| DarthAnal |
Re: Avro Arrow foamie EDF Conversion Downside for the last couple years is that my wife has been swallowing all of my time with helping her and two angioplasties for me. So I've been spending piles of every day reading fanfiction and watching Star Trek fan films on YouTube waiting for her next action-stations call (help her get out of her chairs and up/down stairs, dog wants to be walked, making meals, doing laundry). No flying or building. |
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| 10-05-2023 11:47 AM | ||
| cessna180 |
Re: Avro Arrow foamie EDF Conversion The plans are on line, I can send them to you PM me your email. Very simple plan. Michael |
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| 10-05-2023 11:11 AM | ||
| DW_Crash |
Re: Avro Arrow foamie EDF Conversion Quote:
Are you making plans available? dave |
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| 10-05-2023 10:36 AM | ||
| cessna180 |
Re: Avro Arrow foamie EDF Conversion Well here is my venture into building and flying an Arrow. First attempt I installed 2 50mm fans on 4s. Big mistake, minimal thrust. Next was 2 64 mm fans on 4s. More thrust but not enough. So let's do some thinking. Intakes are long and narrow and there is bad transition from the intake to the fans. So print an installation for 1 70mm fan on 6s 3300 60C. Clean up the transition area so there is smooth airflow from intake to exhaust. I now think it will fly. Also install cheaters on each side of the intakes. Now it flys but not great as it is very difficult to turn. Needs a rudder. And finally I believe an attempted tight turn, stall and destruction. Over the past 2 years I have built a dozen edfs. mostly profile and some semi-semi scale jets. Some are great flyers and some are not. So the experiments continue. Here are some facts that I have learned. Using a 50 mm fan 4s max gross weight should be 750 grams. 2 50 mm fans 4s 1400 grams. Single 64mm fan 4s 1000grams. Dual 64 mm 4s 1900 grams. Single 70mm 6s 1900 grams. Dual 70mm fans on 4s 2000 grams. Also calculate the wing loading and this will have an effect on the performance. As for the Arrow I may build another one this winter, and try to keep it much lighter as its gross weight was 2230 grams 6s 3300 60c battery. As I have learned with a lot of trial and error. KEEP IT LIGHT. Michael Now this S3 Viking 70mm 4s 4500ma is a GREAT flyer, even surprised myself. |
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| 10-04-2023 06:19 AM | ||
| pogo |
Re: Avro Arrow foamie EDF Conversion Please keep us posted on how you make out with the new power system John- always interested in your Arrow exploits. I have a similar system in my Vulcan, "Arrows RC" EDF's on 6s with similar wattage- thrust is over 3kg. and quite efficient so your re-powered Arrow should do well.  Tom |
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| 10-02-2023 01:43 PM | ||
| Dutkoski |
Re: Avro Arrow foamie EDF Conversion Well, I certainly hope this will be the final upgrade for this model. I did convert the model to use a single RC Lander 64mm EDF which produced more power than the original twin 50mm EDF setup. But, all customers want to install retracts which seem to tip the scales sorta speak for weight to thrust, so even though the model does fly better, getting off of grass wasn’t possible due to the drag caused by the grass and the smallish wheels. So, I searched the net for a viable twin 64mm setup and I think I found 64mm EDF’s that will fit the bill. By a company called Power Fun , their units allegedly produce 875 watts of power on a 4S battery and at only a 52 amp draw. So, I can get over 1700 watts of power now. The EDF’s were ordered and arrived last week. I just need to make the appropriate mould to make the thrust tube. It will be for the Arrow and the next companion foamy jet I’m presently designing. |
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| 05-14-2020 10:27 PM | ||
| DarthAnal |
Re: Avro Arrow foamie EDF Conversion I just remembered that you'd given me one of the instruction manuals for the pusher model. I dug it out and went through it carefully. Step 31 talks about installing the bungee hook and the plywood plate to the bottom of the fuselage about 5 to 6 inches in front of the center of gravity. Unfortunately no illustrations or pictures. In the materials list you have "Bungee hook and hardware". I just need to know what you used as the bungee hook. |
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| 05-14-2020 10:01 PM | ||
| DarthAnal |
Re: Avro Arrow foamie EDF Conversion Quote:
No, actually, it's this plane. I'm trying to see how you set up the connection between the plane and the bungee, what I'm calling the "hook" that you set up to connect the Arrow to the bungee cord. I've got a handle now on the bungee setup and the frame/foot treadle. The depron Arrow is safely tucked away in the shelves until I get more time to sit back and figure where the servoes, speed congtroller, batteries and radio have to be put. |
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| 05-12-2020 07:46 PM | ||
| Dutkoski |
Re: Avro Arrow foamie EDF Conversion Are you talking about the depron Arrow you picked up? |
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| 05-11-2020 09:25 PM | ||
| DarthAnal |
Re: Avro Arrow foamie EDF Conversion Quote:
I'm thinking that the Gripen is probably the first thing to get ready to fly this summer and have been getting various recommendations as to how to set up the model and the bungee. |
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