Combatpigg's 1903 wright flyer
#176
What about using a QB or if you can reconfig for a counter clockwise spinning engine such as a TD .049 or Norvel .061 for enough extra boost.
Could create a a figure 8 in the O rings to keep them from jumping out perhaps a nylon roller where they intersect.
Could create a a figure 8 in the O rings to keep them from jumping out perhaps a nylon roller where they intersect.
#177
I would only use a larger engine to spin a direct drive prop, just to get the model airborne and to see if this design CAN be flown as slowly as what the twin prop power plant provides.
Running the belts with less tension and idler pulleys is a possibility.
I've seen a floating idler that both sides of the belt loop feed through. The idler is not hard mounted to anything, it just floats.
Running the belts with less tension and idler pulleys is a possibility.
I've seen a floating idler that both sides of the belt loop feed through. The idler is not hard mounted to anything, it just floats.
#178
My Feedback: (1)
Join Date: May 2003
Location: Orangeville, ON, CANADA
Posts: 8,658
Likes: 0
Received 2 Likes
on
2 Posts
I'm trying to read your post, and on the right side of the the screen is the Ali ad, with some chick putting adhesive flesh color cups over her boobs plus what else. I still have no idea what you said, you built a Sopwith Cameltoe or something..
#180
Member
My Feedback: (1)
Join Date: Aug 2011
Location: vancouver,
BC, CANADA
Posts: 94
Likes: 0
Received 0 Likes
on
0 Posts
Gustave Whitehead.. Interesting Wiki on a subject your School system wilfully ignored
Worth a read at least
https://en.wikipedia.org/wiki/Gustave_Whitehead
Worth a read at least
https://en.wikipedia.org/wiki/Gustave_Whitehead
#183
At least according to the internet there have been replicas including at least one that has flown but not with an original type power plant. In terms of early flight there were individuals who had flyable gliders and it was the power plant that made the difference. Even the Wrights engine in the flyer was just barely light and powerful enough to get the job done. Without Charlie Taylor the Wrights might not have flown as early as they did.
#185
My Feedback: (1)
Join Date: Sep 2004
Location: Newport News, VA VA
Posts: 246
Likes: 0
Received 0 Likes
on
0 Posts
combatpigg,
Have you thought about using timing belts, helicopter models having been using them for years. I have even seen timing belts used on a Cox .049 TD successfully back in the seventy's.
Gene
Have you thought about using timing belts, helicopter models having been using them for years. I have even seen timing belts used on a Cox .049 TD successfully back in the seventy's.
Gene
Last edited by g-rock; 11-17-2015 at 04:22 AM. Reason: Bad memory
#186
Gene, I did a few general searches for toy helicopter parts, sewing machine parts, turntables, but didn't come up with any useful help or info. In most cases the best I could find was a part in an exploded view with no dimensions and a fairly high price tag. So I gave up.
The O-ring system might work better if I go with less tension and idler pulleys to help stabilize the belts at higher rpm. I think it'll work "as is" if I find the correct props and get the airframe set up better for low speed control.
The O-ring system might work better if I go with less tension and idler pulleys to help stabilize the belts at higher rpm. I think it'll work "as is" if I find the correct props and get the airframe set up better for low speed control.
#187
My Feedback: (1)
Join Date: Sep 2004
Location: Newport News, VA VA
Posts: 246
Likes: 0
Received 0 Likes
on
0 Posts
Combatpig,
I believe that SDP, http://www.sdp-si.com/ has everything that you will need. Look at (timing belts) .080 (MXL) and .0816 (40 D.P.) they start at 1/8" wide. Even current helicopters that have a belt driven tail rotor, use this size timing belt. I was using this size belt on my machines back in 1970 and they were purchased from SDP. When used directly on the engine, a flywheel is required.
Gene Rock
I believe that SDP, http://www.sdp-si.com/ has everything that you will need. Look at (timing belts) .080 (MXL) and .0816 (40 D.P.) they start at 1/8" wide. Even current helicopters that have a belt driven tail rotor, use this size timing belt. I was using this size belt on my machines back in 1970 and they were purchased from SDP. When used directly on the engine, a flywheel is required.
Gene Rock
#190
Gene [and MJD], thanks for the link to that supplier and the recommendation for which belt system to use...!
If all else fails, I'll have to scrap the system I built and try this.
Besides cost, the first thing I wonder about is how bulky a twin / divided / siamesed cogged pulley with integral spinner cone will be at the engine. I need to draw a side view of that.
If what I built [so far] wasn't working at all with no promising results I would have scrapped it after the first attempt failed. I've got enough invested in this 2nd attempt [not a lot, but enough] to keep me from scrapping it just yet.
I've got to get the current airframe in the air and get the major kinks worked out. I might as well use a single engine that weighs about the same as the .049 powerplant and clear that hurdle first.
I just received a couple different props to try with the .049 powerplant and will see how much thrust they produce. I've got an assortment of spare O-rings and will experiment with less tension and a floating idler pulley for each belt.
The .049 that I fitted with a front bearing isn't doing so well. I had to undercut the front of the shaft to slide into the bearing. The cut takes the shaft O.D. even with the rut that Cox has near the end of the shaft, so I hoped it wouldn't weaken the shaft too much. I was wrong.
It hasn't broken but it has a wobble. Cox left that extra nub of load bearing steel at the end of the shaft for a good reason I suppose.
If all else fails, I'll have to scrap the system I built and try this.
Besides cost, the first thing I wonder about is how bulky a twin / divided / siamesed cogged pulley with integral spinner cone will be at the engine. I need to draw a side view of that.
If what I built [so far] wasn't working at all with no promising results I would have scrapped it after the first attempt failed. I've got enough invested in this 2nd attempt [not a lot, but enough] to keep me from scrapping it just yet.
I've got to get the current airframe in the air and get the major kinks worked out. I might as well use a single engine that weighs about the same as the .049 powerplant and clear that hurdle first.
I just received a couple different props to try with the .049 powerplant and will see how much thrust they produce. I've got an assortment of spare O-rings and will experiment with less tension and a floating idler pulley for each belt.
The .049 that I fitted with a front bearing isn't doing so well. I had to undercut the front of the shaft to slide into the bearing. The cut takes the shaft O.D. even with the rut that Cox has near the end of the shaft, so I hoped it wouldn't weaken the shaft too much. I was wrong.
It hasn't broken but it has a wobble. Cox left that extra nub of load bearing steel at the end of the shaft for a good reason I suppose.
#192
https://www.youtube.com/watch?v=ADhr-HyGZxk
Awesome Sauce
https://www.youtube.com/watch?v=MyzIzG2Na1o More Sauce
https://www.youtube.com/watch?v=eWBuO9RVwV4 Nice use of a dolly for launch although elect...
https://www.youtube.com/watch?v=MyzIzG2Na1o More Sauce
https://www.youtube.com/watch?v=eWBuO9RVwV4 Nice use of a dolly for launch although elect...
Last edited by Pond Skipper; 03-16-2016 at 08:20 PM.
#193
Yes..!
He sure didn't need that dolly, but it's useful to see a dolly in action.
There's another video out there of a twin electric WFer just jumping out of the pilot's hand. By all rights, if the first few moments after launch can be done cleanly without any overcontrol / stalls, these planes should be able to lumber skyward with 12 ozs of thrust.
He sure didn't need that dolly, but it's useful to see a dolly in action.
There's another video out there of a twin electric WFer just jumping out of the pilot's hand. By all rights, if the first few moments after launch can be done cleanly without any overcontrol / stalls, these planes should be able to lumber skyward with 12 ozs of thrust.
#194
The second vid the guy did some slight design changes to insure solid control and it worked great
the plane turns on a dime with a mix of wing warp and his added trick. Attention to all scale components
for the size of the plane was quite some doing.
The first one took months of trial and error or timid attempts finally in the end the big beast flew.
the plane turns on a dime with a mix of wing warp and his added trick. Attention to all scale components
for the size of the plane was quite some doing.
The first one took months of trial and error or timid attempts finally in the end the big beast flew.
Last edited by Pond Skipper; 03-19-2016 at 01:18 PM.