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I would like to open a decussion on timer, thier avalibility and applactions.
Anyone that has any information, experence, or ideas please join in. Here is what I am aware of:
1) The mosfet timer- brushed motor run time only, timeing with a pot switch, inexpensive, from Chuck Groth.
2) BMT- brushless timer, run time,run speed, servo DT, controlled with a pot. Great timer easy to trim with. We need to inspire Mr. Groth to make more.
3) Penn Vally Hobbies has a brushed timer kit . Run time only,it only goes down to 15 sec.
4)Starlink/Flight Tec has a timer that is programable, uses a replaceable chip that can be programed just about any way you might want it. Great timer.You will want a chip to trim with and a chip to fly with. You can modify a autosurface mech timer to servo controll using this timer with success, or you can just DT.
5) Smoothie- run time,run speed, DT time with options on how to DT. It even has an option for a alarm to direct you thru the corn at Muncie.I have not experimented with a Smoothie yet, but I am considering it for E-36. If anyone knows of any other timers out there, or has constructed one of your own, please share with the class. If you have any experence with any of the timers already listed that you would like to share please do. If you are the manufacture of any of the above timers and would like to expand on my description please do. If you need contact info on any of the timers listed drop me a line.
Jim
It might help if you would just post info on addresses, contacts, prices, etc…for the timers you mentioned.
Rudy Kluiber
Chuck Groth can be reached at 630-879-1275
Larry Bagalini of Star Link can be reached at 760-788-1858
EF Technologies (Smoothie) can be reached at 302-451-1088
The Smoothie can be seen at http://www.eft-inc.com/modelsPricing will have to come from the venders. There are options from all of the sources that affect pricing.
In order to make timers again, I will have to invest in a batch of boards. If anyone out there wants one, let me know so I can make a decision on whether to make a batch. I can make four kinds:
1) 1-function mosfet timer with booster probe up to 10 A, 2 gr., $25
2) 1-function mosfet timer powered by flight pack, 25 A, 7 gr, $40 or 50 A, 10 gr., $50. Hot wired, i.e, they carry the juice.
3) 1-function brushless timer which talks to Phoenix controller, 6gr, $50. Cold wired, i.e, handles signal only, runs off BEC.
4) 2-function for Phoenix/brushless and dethermalizer, 10 gr, $100. Also cold wired and runs off BEC. Does not include DT actuator but has instructions how to make one.
Let me know which one/ones interest you. All these timers are low tech but reliable enough that they work for me. I got into the timer business because I needed them myself, and have found that making a product to sell is very different from making a component for my own airplane. Your feedback would help me a lot.
I will have a timer for E36 and other small motor electric in early 2007. It is being test flown this week at the KOI.
Hank
I have a timer good for E-36. It weighs 3.6 grams with 9 inches of #22
wire. It is started by a poke with a booster probe. It is adjustable from
4 seconds to 25 seconds and, unlike other such mosfet timers, it cuts off
sharply. It can handle 10 amps at which it drops only .033 volts. It costs
$30 with probe. Shipping 1st class insured is another $2.C. Groth
604 Cleveland Ave.
Batavia IL 60510
flodyn@yahoo.com
(630)879-1275I have tested Chuck’s new timer and it looks like a good choice for E-36. Hank, have you gotten any fedback from KOI yet on your prototype?
I am sure Chuck makes a fine electronic timer. It is all in what one wants.
The reports from the KOI on my protype were all postive. No problem with installation and it gave an accurate and reliable cutoff at the desired time. For the people more used to gas FF timers, it is a comfortable timer to use. Looks and works very simillar. Nothing delicate to worry about.
I have made some changes on my own to make it even better and feel the tinkering stage is over.
I am not going to give out a date or a cost at this time, but will let all know when I have it. I already have a good part of the first run comitted just based on the reputation of the Micro I timer.
Has anyone come up with the killer motor/gear set/prop? Brian reported brisk sales of the Sparks kit at the KOI.
Hank
I look forward to owning one of your timers. I am still torn between the GWS LPS “A” motor and the MM1 geared 4:1. What is the recomended power for the Sparky?
I think Rex has come up with a working combo. I’m sorry, but I can not give all the details. It is a 4.8V GWS motor and 4:1 gearing with a GWS 8×4 or 8×6 electric prop. He has been using Sanyo 150 mah nicads but is changing over to the 190 mah ones. I still would like to see them go up like a gas job, but apparently, that is not going to happen within the contraints of the power package.
dick ivers has advanced electronic timers for e-36, F1Q and scale . richardivers@comcast.net 781-710-4209
Yes, I do have timers for E-36, F1Q, and Scale. There were 3 flyers using my E-36 timer at KOI. Walt Rozelle finished 1st, Dave Acton 2nd, and Rex Hinson (not sure where he finished). Dave Acton used it at the Nats for 2nd place. Vic Nippert has one, but I don’t think he has used it yet.
Dick Ivers
Dick, Can the F1Q timer be programed for servo controll? What are the functions of the other timers?
Jim, Yes, the F1Q timer has programmable servo control. The timer’s software controls motor shutoff and also moves a servo to VIT,AR, and DT positions. See a photo of the F1Q timer on page 26 of the 2006 Sympo. The board design has changed a bit since then, but still the same size. It now includes an input for radio DT.
The E-36 timer controls motor shutoff and DT. DT can be via servo, hotwire cutter, or pager motor. The board is smaller than the F1Q. Motor functions include soft start via a remote start switch and electrodynamic braking. Braking helps with prop folding.This is 95% of what the new E timer will look like (less the faceplate markings) The only visible change will be the elimination of the “loop” in the start wire at the lower right. This will be very familiar to all those who have used my Micro I timer. It will fit beautifully on the fuselage of the Sparks. A simple wind it up, trip it, and launch timer. No fragile electronics to deal with. No seperate battery to adjust the timing. Timing is easy to set to whatever you want. The electrical switching is done by an aero space grade microswitch on the back, so it is a clean on and off. You can test the motor by simply pushing the scroll wire down toward the scroll, without engaging it. Easy way to verify all is working well, before you set the time and launch.
Weight as you see it here is 7.05 grams. Yes, it is a few grams heavier than an electronic timer. But, it has some advantages preferred by many. A tiny snubber capacitor will be soldered to the terminals on the back before shipment. You supply your own wire and connectors. Or, send to me and I will attach for you.
Production is expected about end of March.
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