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Old Oct 01, 2009, 02:45 PM
brett1984 is offline
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A little boeing 737-500 build thread


hi guys, while waiting for the funds to build up for the power system for my 747-400, i decided after reading this threadB 737-500 and seeing that it wasnt avaliable as a kit any longer i set about building my own from depron.

model's specs.

wing span 800mm
length 765mm
power- gws 40 or 50mm edfs
2 cell lipo
weight???
construction- 3mm and 6mm deporn, with a little balsa.

designed in cad from the boeing plans. to day the construction started on the nose, just 4 fromers to cut.

the out line and 3 formers, the out line is from 6mm depron and the fromers from 3mm deporn, they just slide together.

more soon....
Last edited by brett1984; Oct 01, 2009 at 02:53 PM.
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Old Oct 01, 2009, 03:13 PM
adbradley is offline
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Very nice!
Old Oct 01, 2009, 03:14 PM
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What kind of glue are you using?
Old Oct 01, 2009, 05:10 PM
brett1984 is offline
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uhupor


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Originally Posted by adbradley
What kind of glue are you using?
im using uhupor
Old Oct 01, 2009, 05:22 PM
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whats the drying time on that stuff? and does it sand well?
Old Oct 01, 2009, 07:09 PM
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uhu por


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Originally Posted by adbradley
whats the drying time on that stuff? and does it sand well?
its quickish, you put it on the two surfaces you want to join, push them together. them pull them apart wait 5-10 mins then put them back together and the joints set. its foam safe thats why i use it and cheap
Old Oct 03, 2009, 12:20 AM
alpea 41 is offline
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Nice work!!! if you can would you share the profile drawings you are modeling to. This is one park jet I want to build, in South West colors of course.GWS fans are not too powerfull. I 've been having good performance from these inexpensive 64mm fan units from Hobby King http://www.hobbycity.com/hobbycity/s...or_Assembled__ 2 of em are flying this SU 34
Flying 9 13 09 003 (1 min 3 sec)
Last edited by alpea 41; Oct 03, 2009 at 12:41 AM.
Old Oct 03, 2009, 12:40 AM
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The Flanker is built from a Stryker wing here's a picture .
Old Oct 03, 2009, 12:46 AM
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Brett with that light construction, you should be able to go EDF40 or 50 brushed. I've flown a psuedo 737 scratch build a few times with the 12v IPS motors in EDF50 fans on 3s. Not sure how long they'll last, but so far so good.
Old Oct 03, 2009, 01:56 PM
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edf


hi alpead and everybody, that edf is way to big for this little model. it would look a bit to silly with these hanging off the wings. and they would be too heavy. im also building a 60 inch version of this model, the edf you used would power that nicely.

have not had chance to work on the 737-500 but will be building tomorrow, the centre fuselage and the rear if possible, may even start on the wings.
Old Oct 03, 2009, 02:41 PM
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Brett us Americans only know mm in certain sizesthat we are familiar with. 800 mm w s is ??? I only know mm in edf fans and thicknesses of depron and such 50 mm fans do seem to be the scale size.
Old Oct 03, 2009, 03:05 PM
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not to big!!! just right


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Originally Posted by alpea 41
Brett us Americans only know mm in certain sizesthat we are familiar with. 800 mm w s is ??? I only know mm in edf fans and thicknesses of depron and such 50 mm fans do seem to be the scale size.
hi alpea, the wing span is 800mm is 80 cm or 31.5 in . just a nice size dont you think, not too big or too small.
Old Oct 03, 2009, 06:05 PM
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wow, it looks good!

Question about the LG in the plans, why are they so tall? I looked at the side views of the real plane and the LG is short but the nacelles do not touch the ground. However, in the plan, I dont think there is any way to make it shorter without the engines hitting the ground... why is that?

thanks,
teja
Old Oct 03, 2009, 07:20 PM
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Quote:
Originally Posted by teha99
wow, it looks good!

Question about the LG in the plans, why are they so tall? I looked at the side views of the real plane and the LG is short but the nacelles do not touch the ground. However, in the plan, I dont think there is any way to make it shorter without the engines hitting the ground... why is that?

thanks,
teja
Cause 50mm is not a scale engine size. You'd have to use 2 nitrocharged pulse 30mm to come close to scale.
Old Oct 03, 2009, 07:49 PM
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tall


Quote:
Originally Posted by teha99
wow, it looks good!

Question about the LG in the plans, why are they so tall? I looked at the side views of the real plane and the LG is short but the nacelles do not touch the ground. However, in the plan, I dont think there is any way to make it shorter without the engines hitting the ground... why is that?

thanks,
teja
hi teja, just like flexserve said, the engines would have to be about gws edf 30 size for the landing gear to be at the correct height. i only enlarged it to suit the gws edf 50 i put on the wing. plus as in the real pane the engines are about 3-ish feet of the ground so this would mean the engines on the model would be about half an inch of the ground (12mm) as ive scaled it down from the full size boeing plans. and 12mm/half an inch is not enough ground clearnce on grass which i fly off. not that it would take off on grass but id like to attempt scale landings!!!!!


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