Pegasus throttle problem

[hangingfromstring]

May of last year purchased Pegasus 2005 after 25 hours of use, doing some touch and go's on the third t & g hit the throttle to full power ! Guess what no power ! Throttle cable slipped through where fastened to handle with allen screw. Easy to fix right, just reset and tighten, done. Back to more fun !! Just about 75 hours later. Finished with a student then went to hanger, upon throttle up, guess what ? no power again only this time broken cable ! In my opinion this is a very poor design. You can't even preflight this as it is not visable unless tear down of throttle assembly. The use of an allen on a cable like this is done only weakens it at that point. What do think?undefined :confused:

[iflyarascal]

I think your right. You forced me to run out and look at the one on my Rascal I found the same thing you did. I think looping the excess cable back and fastening it to itself would help but may cause slack. I have some small cable collars that could be placed on the cable before and after the throttle arm . They also clamp down with allen screws,though. But 3 is better than 1 .I would think. If you need a couple of these collars send me your address and I'll send you a couple.(free). If you come up with something better let me know. On a different note, sounds like your cable isn't working very smooth. I would check and make sure there are no sharp bends in the cable .
Dave

[woodyking]

Be sure the cable has slack when the throttle is all the way open so you're not letting the carb slides be the hard stop. Then come up with a way to have an eye where the cable can go through with a thimble and come back on itself with a swage, so the pivot motion is between the eye and the thimble, and not bending the cable. Hard to picture, wish I could draw here... It may be necessary to move the housing stop back to give more room, or shorten the housing so as it's not curved or kinked. When splicing or eyeing a cable, use the copper swages like on regular control or lifting cables, they do not weaken the cable at all. Not aluminum ones like lowes has, but copper, you can get them from aircraft spruce or any sailing supply. You will need a tool, about $25, to swage them, but it will come in handy forever, every now and then........ The type where you tighten two bolts works better than the large plier type, unless you really spend big bucks for a high quality plier type. Most of the plier types I have seen, the jaws do not matchup exactly and will not make a perfect crimp. Woody

[Dennis Bowers]

When I first assembled my Rascal, I know I frayed the throttle cable right where the allen screw secures it to the throttle handle. So far no problems but I am always alittle concerned about it and am determined to rectify it if I ever have to replace it. And you are right. It is impossible to preflight that area. Which gives me an idea to replace the side plate with a piece of plexiglass so I can see it. At any rate, I much prefere the throttle setup the way Powrachute has it as opposed to the 'big stick' between the legs like some other manufacturers have it. Maybe because I'm used to it and it's more like the throttle on a Cessna or Piper. (Forward-fast, backward-slow). All in all I wouldn't necessarily say it's a bad design, there's just some aspects of it that could use some improvement. DB

[hangingfromstring]

Hey guys ! Just saw a Raptor 2005 Has the perfect throttle assembly ! Now all I have to do is find one and install on my Pegasus. E mailed factory web site as of yet no responce ! Any one know where I can get one? Steve Hanging by string.

[jdeer]

If your refering to the Southern Powerparachutes Raptor you will have to wait until March. I asked John if he had any extras but he has only enough for what he is building now. They are made specifically for his aircraft and he gets them in numbers.

[Dennis Bowers]

I went ahead and replaced the panel on the side of my throttle assembly with a piece of plexiglass today. I picked up a scrap of 6x6 at the hardware store for nothing and used the original as a template. It looks great and I can see all the inner workings of the entire assembly. DB

[hangingfromstring]

Great idea, what thickness did you use? Also I think I have another idea I'm going to use, soldering the cable about four or five inches through the throttle arm, then tighten the allen on the soldered section. And to insure a no slip, am going to crimp a sleve on the loose end just about oh, maybe 3/16 inch past the throttle arm that way if allen slips I can see a drop in engine rpm; and the sleeve will catch and not let go any further, but not enough to cause a catastropic event! However I think I still try to get that Raptor throttle, one problem still exists. How in the h--- am I going to solder the cable? I know they can do it, thats how they put the ends on the cable stops. Would like to know if any one knows how and could share with me. Hope this spurs thought out there. Steve

[Dennis Bowers]

I just used standard single strength plex. 8th inch thick I think it is. DB

[JohnandLori]

Hello, I have never posted a reply here, only read and learned but I am gonna put my 2 cents in on the throttle cable soldering issue! I would not try to solder on a cable because of the heat needed to make an efficient solder. I think the heat would deteriorate the tinsel strenth of the cable as well as change the flexibility, therefore negatively effect the longevity of the cable. Cables which have soldered joints are done in a factory environment with all parameters controlled accurately. Again, just my 2 cents worth!! There may some better advice available for sure.