Bob Martin SR-7 or Coyote - RC Groups
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Sep 23, 2007, 11:56 PM
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Bob Martin SR-7 or Coyote

Are there any kits being made today that look like either of these planes. I like the look of the low wing with dihedriel and swept wing. Any info is appreciated.
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Sep 24, 2007, 04:31 PM
David Layne
Check out the Jart,, it should tinkle your bell.

Sep 24, 2007, 11:23 PM
Si Vis Pacem Para Bellum!
Doubletap's Avatar
Unfortunately, these "pure" slopers of the 70's-80's have come and gone; kits like these are very rare nowadays and normally are produced on a very limited basis. If you are interested in these great vintage slopers, there is a thread in the Slope Soaring forum dedicated to vintage slope planes:

There you will find the knowledge and resources associated with this niche category.

May 04, 2012, 03:58 PM
Registered User

SR7 Sailplane N.I.B.

Anyone interested in a Bob Martain SR7 ? I got it thinking I would have a sailplane to pull up with my Rascal but it looks like it will be too small for that. It is brand new in the box. Email me if interested.
May 04, 2012, 09:08 PM
bjaffee's Avatar
Originally Posted by Mcgyver52
Anyone interested in a Bob Martain SR7 ? I got it thinking I would have a sailplane to pull up with my Rascal but it looks like it will be too small for that. It is brand new in the box. Email me if interested.
Post it in the classified'll probably get a lot of hits on that.
May 05, 2012, 10:27 PM
Coyotes are dogs to fly, SR7s are fun. I've had both.
May 06, 2012, 02:08 PM
Registered User
Compared to what?

Compared to 25 years ago Coyotes weren't DOGS.
May 06, 2012, 02:20 PM
Compared to the SR7 he's looking at. It's like comparing an aileron trainer and a Corvette. I was flying 25 years ago and then some...

I still have a Coyote, I think they look great, but it's still a dog. I have dreams of some day having time to build a new wing with a better airfoil and big ailerons. I should just sell it....
May 06, 2012, 04:53 PM
Registered User
Libelle201B's Avatar
Nothing wrong with the Coyote as a sloper, but it is slower than many of the newer designs for sure most likely due to the thicker wing section. It's pretty rugged and a great windy weather plane as it handles well in those conditions. The airfoil is an Eppler 374 or very close to it making it aerobatic but it definitely doesn't fly inverted as well as it does upright, you have to keep the speed up while up side down to maintain adequate control. I did modify mine by reducing the span by about 6 inches so it would fit in the cab of my truck and it didn't hurt the handling a bit.
Nov 20, 2012, 01:58 AM
Registered User

bob martin planes

i had all 3 planes all flew well use to fly with bob and katie on ave 33 mount washington in la ca
wish i still had one.
Nov 20, 2012, 04:35 AM
Registered User
Y'all going on about Bob Martin sailplanes brings back memories of my Bob Martin "Pussycat". I flew it on the slope, in the lightest of winds it just kept flying and flying, in the faster winds it rushed around and did elementary aerobatics and still landed on a dime; in a howling gale, with up to 6 extra AA batteries stuffed in the fuselage (no-one even used the work "ballast" back then), or even the odd stone or two, it shrieked across the slope.

On the flat, it towed up a dream on a hand-line, ditto with a high-start and even spent hours and hours thermalling, after a 60-second run of a COX .049, on a pylon, rubber-banded onto the wing.

It was perfect. Then, one day a friend of my son appeared on the slope with a beautifully built, Italian, "full-house", low-wing sailplane , with which he thought he was going to learn to fly. It seemed a tragedy to me and, as he refused to try and learn with my "Pussycat", which virtually flew itself, I finally ended up swapping the PC for his Italian job!

He decided his 27 mhz. radio was better than my 35 mhz and that the PC nose was too blunt and set about giving it a pointed nose and fit a, very dicey, 27 mhz. receiver. Not only was it "dicey", but the local taxi radios ran on 27 mhz. and many of them had "boosters", to boot.

I imagine you can imagine the end of my pride and joy. Its first re-maiden lasted all of three seconds, as, on top of everything else, he decided that a very craggy hill, with wicked turbulence and a howling gale, was the ideal place to start learning to fly.....

The "Italian" job did not last much longer. I thought it a little unwise to try and trim it at the slope and did so on the flat. Not too bad, so we decided to give it a "hand-tow" (I think i've told this one before), son and heir goes charging off across the field like Usain Bolt, straight into stiff breeze...4? seconds, I reckon, before the wings applauded. RIP

What memories.

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