Settings on D/R,,Exponential and EPA
09-01-2011 | 04:05 PM
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From: Conway,
AR
Settings on D/R,,Exponential and EPA
Hi Can one of you jet jocky tell me what would be a good setting on the Daul Rate, Exponentials and End Point Adjustment for a 50mm EDF 25in wing span sabre f-86.
09-01-2011 | 06:26 PM
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From: Manchester,
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RE: Settings on D/R,,Exponential and EPA
how long have you been flying?
how many edf jets have you tried?
what do you suppose the top speed of the jet is?
you might just fly on one rate, with some expo, because, the rates AND expo are just used due to the high speed end of the envelope.
Set up a 25 inch sabre like this: Say the plans call for 1/2" or 12mm or so, on ail,el,etc. Set the throw for more, say 5/8 or 17mm. Then 'soften' by expo.
On a spectrum DX7 or DX8 use +50 on the expo.
If this EDF is modified, for alot of extra speed, and you feel comfortable taking a hand off the stick to switch the rates, I'd just not use dual rates at all, because the flight changes very quickly, and even a second makes for smoking hole in ground.
Check the expo rate I've given you, against the surfaces throw. at 50 the throw at 50% stick is about 1/3 the total control surface throw. ( if it's another type of radio, ie Hitec, check for + or - on the expo setup, since the idea is to reduce the throw more around the center, yet have full throw at the end of the stick movement.
I''ve used
+60 on all my jets successfully, and as low as +48 on my aerobatic planes.
The amounts are arbitrary, because it has to do with 'feel'. Any flyer has a unique technique for controlling an aircraft, so compare what you normally use on pattern or aerobatic planes, with the edf's. I went from 48, up to 60 for jets, and it was a good test.
You should be doing your homework on the performance envelope of that Sabre. If the top speed is no more than an Extra, say, or a 3D Extra, then just use 50. If the top speed will be more, use more expo.
As far as my experience with a small Sabre EDF, I have none, but I hope you've read my advice, it should get you going in the right direction.
Please cross-reference my advice with the other replies, and good luck!
The endpoint should always be 100. the total throw is from the amounts of lengths of the servo horn, and the control surface' horn. the total throw can be changed by using the correct hole in the servo arm or control horn.
how many edf jets have you tried?
what do you suppose the top speed of the jet is?
you might just fly on one rate, with some expo, because, the rates AND expo are just used due to the high speed end of the envelope.
Set up a 25 inch sabre like this: Say the plans call for 1/2" or 12mm or so, on ail,el,etc. Set the throw for more, say 5/8 or 17mm. Then 'soften' by expo.
On a spectrum DX7 or DX8 use +50 on the expo.
If this EDF is modified, for alot of extra speed, and you feel comfortable taking a hand off the stick to switch the rates, I'd just not use dual rates at all, because the flight changes very quickly, and even a second makes for smoking hole in ground.
Check the expo rate I've given you, against the surfaces throw. at 50 the throw at 50% stick is about 1/3 the total control surface throw. ( if it's another type of radio, ie Hitec, check for + or - on the expo setup, since the idea is to reduce the throw more around the center, yet have full throw at the end of the stick movement.
I''ve used
+60 on all my jets successfully, and as low as +48 on my aerobatic planes.
The amounts are arbitrary, because it has to do with 'feel'. Any flyer has a unique technique for controlling an aircraft, so compare what you normally use on pattern or aerobatic planes, with the edf's. I went from 48, up to 60 for jets, and it was a good test.
You should be doing your homework on the performance envelope of that Sabre. If the top speed is no more than an Extra, say, or a 3D Extra, then just use 50. If the top speed will be more, use more expo.
As far as my experience with a small Sabre EDF, I have none, but I hope you've read my advice, it should get you going in the right direction.
Please cross-reference my advice with the other replies, and good luck!
The endpoint should always be 100. the total throw is from the amounts of lengths of the servo horn, and the control surface' horn. the total throw can be changed by using the correct hole in the servo arm or control horn.
09-07-2011 | 10:45 AM
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From: Conway,
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RE: Settings on D/R,,Exponential and EPA
Hi aces&8s: I thank you for that info. Yes i have flown EDF before But since i have moved and working so maney hrs per day, Plus it being so hot to do anythink outside, I haven"t had a chance to do alot of flying like i did before. Hopefully now it will get cooler and i can go to a flying field and do some flying.
Yes i have this Sabre F86 and Its suppose to go 85mph Plus With everthing stock. I have a twin 65mm f22 EDF jet Which i fly but its been a while and its in storage in another state. Hopefully i can go and get it to fly it,i miss that f22. Its one of my best jet. Thanks again for the info, i will try them out when i get a chance.
Yes i have this Sabre F86 and Its suppose to go 85mph Plus With everthing stock. I have a twin 65mm f22 EDF jet Which i fly but its been a while and its in storage in another state. Hopefully i can go and get it to fly it,i miss that f22. Its one of my best jet. Thanks again for the info, i will try them out when i get a chance.
