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fredvon4's

Finely polished Cox .049 with exhaust collector.




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Post  OhBee Thu Dec 17, 2020 12:09 pm

That was close!....gonna be Ok?...Engine mount 20201213
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Post  balogh Thu Dec 17, 2020 12:31 pm

If the crankcase fits well in its bed then the lateral forces acting on the mounting beam will not be critical even if there is only little meat left between the bolt and the bed, IMHO
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Post  OhBee Thu Dec 17, 2020 12:54 pm

There is some space between the engine and the beams. Was thinking about a couple of thin hardwood strips epoxied in to take up the space?Engine mount 20201214
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Post  balogh Thu Dec 17, 2020 1:43 pm

That would definitely help relieve the lateral load on the bolts..
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Post  Ken Cook Thu Dec 17, 2020 2:45 pm

You have sufficient material to hold the bolts. I would use blind nuts opposed to using nuts. Rough em up and epoxy them into the nose. The holes are drilled. Anything after those holes is meaningless. In fact I've found engines that are fit tight into the opening have a tendency to cause unwanted vibrations requiring the bearers and doublers needing to be cut back. Due to the fact that your mounting a TD profile, adding a 3/32" or 1/8" shim of aluminum under your engine lug would also offer a larger footprint not too mention it will assist in making your tank work correctly.
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Post  OhBee Thu Dec 17, 2020 2:55 pm

There's really not enough meat there for blind nuts!.....ya ..the fuel tank is another conundrum. 3/8 oz big enough for 2-3 mn. with a TD?...Its all I got.


Last edited by OhBee on Thu Dec 17, 2020 3:03 pm; edited 1 time in total
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Post  dirk gently Thu Dec 17, 2020 2:57 pm

@OhBee wrote:There is some space between the engine and the beams. Was thinking about a couple of thin hardwood strips epoxied in to take up the space

I would do it, if only to just not have to think about it.
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Post  OhBee Thu Dec 17, 2020 3:05 pm

I see "wallhanger" in it's future!
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Post  balogh Thu Dec 17, 2020 3:07 pm

C'mon OB I want to see this fly..you do not hang a crispy TeeDee049 on the wall.. Very Happy
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Post  OhBee Thu Dec 17, 2020 3:09 pm

Engine mount 20201215
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Post  OhBee Thu Dec 17, 2020 3:14 pm

[quote="balogh"]C'mon OB I want to see this fly..you do not hang a crispy TeeDee049 on the wall.. Very Happy [/quote
 Well,thats better than in a box  ! ...Isn't it?    For a "simple" kit,  this whole thing has been a pain!  Making do with what I can scrounge is getting tiresome. Not to mention the long lost skill set.
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Post  rsv1cox Thu Dec 17, 2020 5:15 pm

Shim it a little large both sides, sand/file down carefully to fit. Epoxy in. Touch up with your paint which looks very good. What is it?

Good luck.

Bob
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Post  OhBee Thu Dec 17, 2020 5:37 pm

Bob...the paint is Rustoleum ultracover...Key Lime. Over a white primer..topped wth 2 coats of Krylon satin polyurethane. At least this time everything was compatible! Unlike the fiasco I had painting the Wido Satan.

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Post  fredvon4 Fri Dec 18, 2020 10:03 am

re read Ken Cooks advice then re read it again....

There is plenty of meat for the small nut plates...more than 80% will be backed to wood...the dinky part in open air can be ignored or filed flush

The opening NOT touching the sides of the crankcase under the mounting lugs is irrelevant and preferable so you can float the engine while establishing up or down thrust

Use two steel, aluminum, or plastic 3/32" or 1/8" shim plates under each lug. This will move the engine out board a bit to better be in line with fuel tank center....these shims can be flat or slight angle to give in/out thrust...home made or Brodak/ Lee Machine shop

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Post  OhBee Fri Dec 18, 2020 6:35 pm

Hey Fred!...thanks for the tips!.....recognize that engine?
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Post  getback Sat Dec 19, 2020 7:07 am

What Fred said ^^ Christmas Tree
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Post  fredvon4 Sat Dec 19, 2020 10:47 am

Yes I do...sort of looks like the bottom of one of the many TeeDee engines I sent around the world to folks

I too want to see this plane twist you around until you wonder if it is EVER gonna run out of fuel

The giggle and grin is worth the pain of making it AND flying it
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Post  OhBee Sat Dec 19, 2020 11:18 am

Fred...what size fuel tank will run this 2-3 min?...I doubt I could spin around much longer than that!
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