Does anyone have the recommended control surface throw measurements, for an original Midwest Mach 1 pattern plane? I've acquired an old original in good shape, but without the plans. I've found many threads on RCU & RCG, but no mention of these measurements. I did find a suggestion of CG at 3 1/2" behind leading edge. Is that correct?

Thank you to anyone with the info;
Jerry

If no one knows, you can use this website to figure it out. Put it at the 25% point. Dan.

http://edgewoodflyers.com/GroupResou...4/Default.aspx

Dan, thank you for the link. I'll plug in the numbers & see if it concurs with my CG number. Still could use the control throw numbers if anyone has them.

Jerry

Hi,
I have the Midwest Mach 1 plan (both as paper and as PDF).
Center of gravity on the plan is 88 millimeter (3.5 inch) from wing leading edge at wing root.

I had a Mach 1 (built from MAN plans) in the middle 1970th and the control surfaces throws was rather moderate, ailerons not more then neccesary to do 3 rolls in 5 sec on full throws. Elevator throw just enough to get it into spin. Rudder just so it was enough for spin and stall turns in figure M. No differential was used by me.
Now with modern radios You can have, to start with, dual or tripel rates (preferably as flight modes/condition) so You can have larger throw at maiden just in case and then switch to lower throwns and experiment until You have throws as You prefer. But, as usual, mechanical setup to optimal throws so You use servo travel optimal is best.
I flew my Mach 1 for a couple of years and competed with it. It was a nice plane, one of the most beautiful classic pattern planes in my opinion. I used a Rossi 60 FI RC (with servo adjustable needle) and Rossi pipe, radio was an EK logictrol super pro 7 ch, retracts was Carl Goldberg plastic(nylon) mechanical retracts (never failed).
I later modified it to have a Rossi 61 FI RE RC (rear exhaust) with pipe through the canopy. It was screaming fast with that engine.

If You need the Midwest Mach 1 plan in PDF just send me a PM with Your mail and I can send it to You. I have also the Midwest Mach 1 supplements as PDF as well as the field and bench review from Model Airplane News July 1973 in PDF.

/Bo

Here's the plan set you can download. Has the CG marked:

http://www.outerzone.co.uk/plan_details.asp?ID=5462

Bo, PM sent. Generous & helpful. Thank you.

Jerry

Bill, thank you for the link.

Jerry

The Midwest plans show the CG at 4" (103 mm) aft of the LE at the root. Bem gave good advise for the control throws.

Jerry Jackson
San Antonio