- This topic has 28 replies, 7 voices, and was last updated 15 years, 11 months ago by
.
-
Posts
-
Anyone with any information or experence with the Sparky E-36 please chime in. If you have images post-em.
Jim, how is your design coming along? Brian has sold quit a few Sprarks kits, so some should be being built now.
It appears to be a short-time problem finding a motor for this thing. The supplier is out of stock, should be back up soon, I hope. The kit is quite a nice one, and BMJR is to be commended for their efforts. Also, Rex has done a great job on the instructions and flying tips. Maybe I can even get this thing done by the Nats!!
No, that is actually Rex Hinson’s plane. It came to me via email and I thought people would like to see what one looks like. Mine is still in the box!! [a place a lot of my models stay-I will have to live til about 200 to get all these things built!]
Ah So. I wondered about that AMA number. It is very low. I will have a timer for you by the time you get ready for it.
Someone ask about the low AMA number. It really is my AMA number. It just also happens to be the year I got married. (My wife liked the number, I wonder why).
The Sparks is my design, which BMJR is kitting. Walt Rozelle won King orange flying the kit.Rex
A review of the BMJR Sparks E-36 kit is in the February NFFS Digest. I think Rex Hinson’s design is a straightforward, great-flying E-36. Brian Malin did an outstanding engineering job on the kit. Built warp-free and balanced properly, it will fly off the board. Mine required only one 1/64 shim for good flight, and I increased shimming an additional 1/32 due to quite windy conditions at King Orange.
I feel that anyone building a Sparks won’t be sorry.
Walt RozelleHere is my Sparks. It turned out well. Only one small test glide to date, too windy and I have [as yet], no spare prop shafts. That decision will most likely haunt me this weekend at our first contest.
Nice model, excellent timer from Hank Nystrom. It works well, and is easy to hook up, even for a rookie like myself. Thanks Hank. It weighs 149 grams ready to go, although I just realized I forgot to weigh it with the Walston in it. It should be very close to the required weight, or maybe a tad over. Shouldn’t matter much if I am patient and Hung is helping. I am very curious as to how it will fly. I will know more on Sunday evening.I think my file was too big, I will try again. I am not sure how to do the reduction on a Mac. Haven’t learned that yet.
Nice, Dohrm. How do you handle DT? Tissue? Anyone else in your club buillt the Sparks? Thanks for the nice timer feedback. Which gear box do you uss? The 2 mm shaft or the 3 mm shaft.
I just noticed your lighteng bolts. Neat touch!
Hank, it is tissue covered. I went a little heavy on the dope, figured I needed the weight anyway. Typical Crawford move, use the good wood and then throw away all the weight saved with dope!!
I have the thinner prop shaft-2mm, I think. I have ordered a couple of spares. I also need a different prop, although this one blows stuff all over the place in my shop. This one is the 8043 model.
I went with the fuse DT, I know, I know, but this piece of tubing was just SITTIN’ there!!
I made up a motor mount which encloses the front end. I ran the motor a number of times at 25 seconds, and it didn’t seem to get too hot at all. Anyone think I need to cut in a couple of cooling vents? I will use an Astro charger, seems to work well. Full report on flying or lack of on Sunday.
Fuse is OK, Dohrm. I just have never learned how to use them effectively. And, I like to test with short Dt times. With a fuse, I would be all over the place. Before I developed the MAX series of timers, I went nuts with dT problems. I made that timer for my personal use, and it only became a product when Harry Murphy wrote it up in his MA column. I flew for a year with it all to my own. Until then, there was no two function timer available other than the Seelig, and it was way too heavy for Nostalgia. I have never used the viscous timers, but I plan to try one in my own Sparks.
(not built yet)I wish I still had that prototype timer. Two functions and under 20 grams. Small faceplate.
I thought it looked like the motor was enclosed. Did you have to alter the thrust line? As long as the motor is not getting so hot you can not touch it, I would not worry about cooling holes. Remember, in the air, you will have more coolling than in your hand.
Be careful with it on Sunday. Only fly if the winds are not bad. Do you start out with a 5 second run and work up? I really do not know.
- You must be logged in to reply to this topic.