Trying to get my head back into doing some modeling over the last couple weeks.
I'm working on a new Downscale with a small twist. Some time ago I ordered a couple of each of the available Micro Parts from Quest Areospace website.
As suspected Bill has had his own size tubes made.
The motor fitting tube MMX1 is .257" ID x .277" OD sold in 6.0" lengths
His other size tube is MMX2 which is .372"ID x .392"OD also sold in 6.0" lengths.
there is a "motor tube" didn't get the number which states a .252" ID x .276"OD x 1.0" Long.
a Thrust ring .148"ID x .248" OD x a full .25" Long.
what they call a centering Sleeve: .278"ID x .370"OD x .5" long rolled cardboard with orange OD covering. Talk about heavy!
Most interesting is BNCMMX2: A Balsa Nose cone .392" OD x 1.0" long which is almost a perfect Scale match for the Estes PNC-80K used on so many popular Estes kits as the Optima, Pheonix, Shadow, and others.
MMWW Drawing is done, but I decided to use all Quest parts for this build instead of my usual Totally Tubular tube stock, motor mount and Flis rings. Because the Quest cone was so close in shape it was chosen over turning my own basswood cone. Fin material chosen is 3/64" aircraft Ply to help with the tiny forward strakes. 90lb kevlar and 1/2" x 12" yellow teflon streamer complete the inner workings.
Basic construction is complete;
I found the parts to be somewhat mismatched in that the centering sleeve as it comes from the manufacture is just a bit to tight to fit inside the MMX2 rather thin body tubing. Either I'm really getting ham-handed or these tubes are just a tad on the delicate side. I crimped the first tube badly trying to dry fit the sleeve. Taking a glit stick to the sleeve sanding the orange outer layer completely off the sleeve is a much better fit. using good Old Elmers white glue the sleeved motor mount with attached kevlar shock line installed as indicated. What I forgot about was that darn 1/4" long thrust ring. my motor will not stick out 1/4" instead of my preferred 1/8"
Hollowed out the balsa NC added a 90lb kevlar loop with room for additional nose weight if needed later during swing testing. Hope to get some Primer on the model shortly. Photos well have to wait until I get the one or two a remember to take very late in the process once I get them out of the camera.
I'll try to upload a copy of the Drawing if it's small enough just to get things started.
View attachment MM 3xxc_Optima (T3) 2035_01-06-12.pdf
I'm working on a new Downscale with a small twist. Some time ago I ordered a couple of each of the available Micro Parts from Quest Areospace website.
As suspected Bill has had his own size tubes made.
The motor fitting tube MMX1 is .257" ID x .277" OD sold in 6.0" lengths
His other size tube is MMX2 which is .372"ID x .392"OD also sold in 6.0" lengths.
there is a "motor tube" didn't get the number which states a .252" ID x .276"OD x 1.0" Long.
a Thrust ring .148"ID x .248" OD x a full .25" Long.
what they call a centering Sleeve: .278"ID x .370"OD x .5" long rolled cardboard with orange OD covering. Talk about heavy!
Most interesting is BNCMMX2: A Balsa Nose cone .392" OD x 1.0" long which is almost a perfect Scale match for the Estes PNC-80K used on so many popular Estes kits as the Optima, Pheonix, Shadow, and others.
MMWW Drawing is done, but I decided to use all Quest parts for this build instead of my usual Totally Tubular tube stock, motor mount and Flis rings. Because the Quest cone was so close in shape it was chosen over turning my own basswood cone. Fin material chosen is 3/64" aircraft Ply to help with the tiny forward strakes. 90lb kevlar and 1/2" x 12" yellow teflon streamer complete the inner workings.
Basic construction is complete;
I found the parts to be somewhat mismatched in that the centering sleeve as it comes from the manufacture is just a bit to tight to fit inside the MMX2 rather thin body tubing. Either I'm really getting ham-handed or these tubes are just a tad on the delicate side. I crimped the first tube badly trying to dry fit the sleeve. Taking a glit stick to the sleeve sanding the orange outer layer completely off the sleeve is a much better fit. using good Old Elmers white glue the sleeved motor mount with attached kevlar shock line installed as indicated. What I forgot about was that darn 1/4" long thrust ring. my motor will not stick out 1/4" instead of my preferred 1/8"
Hollowed out the balsa NC added a 90lb kevlar loop with room for additional nose weight if needed later during swing testing. Hope to get some Primer on the model shortly. Photos well have to wait until I get the one or two a remember to take very late in the process once I get them out of the camera.
I'll try to upload a copy of the Drawing if it's small enough just to get things started.
View attachment MM 3xxc_Optima (T3) 2035_01-06-12.pdf
