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Author Topic: Midwest Super Sniffer.....  (Read 431 times)
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kaintuck
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« on: October 06, 2020, 07:28:55 AM »

Decades ago, I build one with a peewee 020, she flew great...underpowered, but nice gentle bird. She was sold or traded off at a swap meet I don't even remember.....I came across the plans and decided to build another, only electric.
Fuse almost done....wings and tail feathers next....here's my kit....
https://ibb.co/V2kRFPH
And the fuse, with motor...
https://ibb.co/qCkVyfk

Oh....and she's kinda been scaled down.... Cheesy Grin
Midwest Super Sniffer.....
Midwest Super Sniffer.....
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OZPAF
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« Reply #1 on: October 06, 2020, 07:14:03 PM »

A friend and I flew a full size sniffer in Australian "scramble" comps at our nationals. The contest gives the competitors an hour to make as many flights as possible, with a max. individual time of 2min.

In reality the flights would be kept down to 40-60 secs to stop the model flying too far away as it had to be retrieved and launched from the original starting line. Great fun for fit competitors.
It was a very consistent flying model and fairly rugged.

Have fun with your reduced size version.
John
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Konrad
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« Reply #2 on: October 06, 2020, 07:28:02 PM »

I too flew a full size (0.049) Midwest Super Sniffer. As it was built from a Midwest kit it wasn't light! But it was very stable and very rugged. I think I flew her for 3 years. I used it as part of my cross country (track and field) training!  As I recall the wing has a single bottom spar. I choose to cover mine in silkspan and dope to add some rigidity to the wings. For a model built by a 14 year old it gave me more rewards than just about any other model until I started to fly the hi thrust pylon ships like the Sig Witch Doctor X and Carl Goldberg Viking. 

All the best,
Konrad
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Cut it twice and it's still too short!
kaintuck
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« Reply #3 on: October 07, 2020, 07:30:17 AM »

Thank you fellows....I wish somebody will take up these older kits, laser or printwood, and sell them at a reasonable price. If they could keep it around 30bucks, there would be a BUNCH sold Grin
Anyhoo....those days are history....but we can still scratchbuild!!!
More progress, tailfeathers done, those elevator ribs are difficult, 1/32 lite balsa, cut them out, then stack sanded, and cut the spar...fit was spot on! The black tube on my pin box is 4 batts stacked, watch battery337...ebay cheapies. Gives 6volts. Still to be fitted, I need a clasp, wired, so when they are put in...it holds the batt pack AND starts the motor. Little slips of copper I think.....I will weight her once the nose is done and she's covered.
https://ibb.co/0hJPqPT
Midwest Super Sniffer.....
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Konrad
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« Reply #4 on: October 07, 2020, 06:59:36 PM »

Thank you fellows....I wish somebody will take up these older kits, laser or printwood, and sell them at a reasonable price. If they could keep it around 30bucks, there would be a BUNCH sold Grin
That would be a lot less than they sold for in the 70's, in adjusted dollars for the die crushed model. If I had a place to fly this size FF model I'd gladly pay close to $100 for a nice laser cut kit with 6-8lb wood.

I have to admit I've never had good results with light contest balsa wood used as wing ribs. Are you planning to use tissue and dope? Any heavier covering is likely to pull up the TE stock.

Using this covering technique you migh get away with some of the lighter iron on film coverings.
https://www.hippocketaeronautics.com/hpa_forum/index.php?topic=22619.msg215945#msg215945
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Cut it twice and it's still too short!
kaintuck
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« Reply #5 on: October 08, 2020, 09:31:23 PM »

Konrad....tissue all the way!!! I have a stash of esaki in cream....here's this evenings progress,,,,
https://ibb.co/dcKpz0f

https://ibb.co/HHSHsKG
I've got a lazy bee I'm building for a fellow....so my tiny birds are kinda in-between.... Grin
I redid the motor....more Cox-y in looks....
Marc
Midwest Super Sniffer.....
Midwest Super Sniffer.....
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kaintuck
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« Reply #6 on: October 09, 2020, 05:02:08 PM »

Finished her today....I need a 35mah battery I think....the watch batts are not heavy enough to balance her...kinda anemic too.....but, she's pretty....I did a 'kit' also....I just have to make the box lid.....
https://ibb.co/whf2VbL
https://ibb.co/kxyKrLk

Don't unhook that gas line!.....tedious to get it on that spray bar!!!!
Marc Grin
Midwest Super Sniffer.....
Midwest Super Sniffer.....
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OZPAF
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« Reply #7 on: October 09, 2020, 05:46:39 PM »

That will be fun as a small electric FF.

John
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kaintuck
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« Reply #8 on: October 10, 2020, 08:12:17 AM »

I was going to try the scale sizes DT....but she was tail heavy without it....I hope to get the watch batts wiredin, just to try and get a small amount of thrust.....
Marc
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Konrad
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« Reply #9 on: October 10, 2020, 11:55:06 AM »

Nice.

The 337 battery? These are silver oxide cells (primary battery [one time use]). Do they have a low enough impedance to allow high enough discharge rates to drive the prop? Can they survive the discharge rate (amps) needed? Are you using them as a one time use power source? Do you use a timer or voltage cut off device? Or do you run them dead for each flight?
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Cut it twice and it's still too short!
kaintuck
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« Reply #10 on: October 10, 2020, 09:06:04 PM »

I have 4 in a stack...one run n done type of power....and I loosely use the term power!...she's kinda heavy...I'll weigh her soon....but I thought batt weight would be a problem....turns out I need nose weight.....so, a 35mah lipo batt will be next on the order.... Wink
And if the batt has the protect circuit....I'll run it till the volts drop....not sure if that little prop will tractor it much...
Marc
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Konrad
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« Reply #11 on: October 10, 2020, 09:36:13 PM »

Most loose lipos DON'T come with protection circuits. Think about adding a LVC circuit. Or a FF timer.
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Cut it twice and it's still too short!
kaintuck
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« Reply #12 on: October 12, 2020, 09:51:33 AM »

I was happy to find one....now just HOW to get it!
https://modelisme.shop/epages/0d0ec28d-f13d-493d-9dc2-9fb4695e2062.sf/en_GB/?ObjectPath=/Shops/0d0ec28d-f13d-493d-9dc2-9fb4695e2062/Products/L35

she weighs with current watch batts: 8.666gm...kinda heavy...may just be a 'hanger queen' Grin
marc
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fred
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« Reply #13 on: October 12, 2020, 10:37:19 AM »

Recently bought a Toy Helicopter from my Dollar Store Has infrared sensors and is controlled by a hand near it..  4$.
 Relevance:  it has salvageable: Motor, Gear box.. And.. a Tiny Lipo cell, charge plug with a status led and a teeny slider switch
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kaintuck
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« Reply #14 on: October 16, 2020, 09:08:17 PM »

I will look for one locally!!! Thank you Fred!
Marc
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