cb11acd
Part of things
Posts: 132
Club RR Member Number: 122
|
|
Dec 12, 2019 11:40:37 GMT
|
I will be completely honest, I haven't read all of the 120 pages.
But love the project, attention to detail, workspace etc.
For the aero testing, what data are you going to collect? Downforce? CoD? And how will you measure? Also what scale is the model? How fast will the wind tunnel run at?... So many questions...
|
|
|
|
|
|
|
Dec 12, 2019 15:07:31 GMT
|
Are you going to run a simulated road? Will you be using the smoke technique or little bits of wool taped to the body work?
|
|
|
|
|
|
Dec 12, 2019 19:55:05 GMT
|
Starting to take shape :-)
|
|
Last Edit: Dec 12, 2019 19:55:56 GMT by nalesutol
|
|
|
|
Dec 12, 2019 19:58:18 GMT
|
Are you going to run a simulated road? Will you be using the smoke technique or little bits of wool taped to the body work? A simulated road is way beyond my capabilities. Smoke only shows you where the air goes, not what it does. However I will do some as it looks impressive :-) On a model this size wool tufts wouldn't work properly as they wouldn't give you the detail you can get on a full sized car.
|
|
|
|
|
|
Dec 12, 2019 20:00:59 GMT
|
I will be completely honest, I haven't read all of the 120 pages. But love the project, attention to detail, workspace etc. For the aero testing, what data are you going to collect? Downforce? CoD? And how will you measure? Also what scale is the model? How fast will the wind tunnel run at?... So many questions... I don't blame you :-) I am looking to collect downforce and drag. Not looking for absolute figures, just want to be able to test whether existing and proposed mods have any effect, both good and bad. I will measure forces using load cells. Model is 1:24. By pure luck its weight exactly scales :-) No idea on wind speed yet, that will be a matter of experimentation.
|
|
Last Edit: Dec 13, 2019 0:13:07 GMT by nalesutol
|
|
|
|
Dec 13, 2019 10:41:41 GMT
|
Hell yeah watching with fascination as that's something I want to do with both the X1/9 and the Spitfire to test out various modifications.
|
|
|
|
|
|
Dec 13, 2019 10:44:11 GMT
|
When I say load cells, I plan to cheat. I am not very food with electronics but I want to be able to record data. My plan is to use 3 jewellery scales that measure in 0.01gms increments. By taking them apart I can use two of scale pads to sit the car on and one for the car to push back on. I will then mount the screens remotely on the outside of the tunnel so they are easy to read. Then pencil and paper will be employed to record the data. I will mount a hand held wind gauge behind the car to measure wind speed, also (hopefully) mounting the screen on the outside.
|
|
Last Edit: Dec 13, 2019 16:23:51 GMT by nalesutol
|
|
|
|
Dec 13, 2019 22:25:11 GMT
|
In for a penny, in for a pound :-)
Just ordered a smoke machine pump and oil.
|
|
|
|
|
|
|
I've just made some popcorn. This is going to be interesting
|
|
|
|
|
|
|
I thought he was designing another garage for a minuet there.
LOL
Seriously the longer you make the approach and exit to the center section you will get a better smoother air flow and result.
|
|
|
|
|
|
Dec 14, 2019 12:08:05 GMT
|
I thought he was designing another garage for a minuet there. LOL Seriously the longer you make the approach and exit to the center section you will get a better smoother air flow and result. Ideally, yes. However, I am trying to keep the cost to a minimum, so used the spare plywood left over from the bed-in-a-box I recently made, using the bed out of our old sofa bed :-) I have polycarbonate for the viewing area. Costs have been minimal - straws, fly screen, fan, scales, wind gauge and smoke pump - £54 If required, I can increase the approach and exit lengths later. It may not work well enough to register small modifications to the car, but has already been a interesting exercise. However, if it works it will give me that extra little advantage over others :-)
|
|
|
|
|
|
Dec 14, 2019 17:37:51 GMT
|
This is going to take some time. Using my 20:20 hindsight I should have bought bigger diameter straws. Luckily I know how to eat an Elephant :-)
|
|
Last Edit: Dec 14, 2019 17:41:16 GMT by nalesutol
|
|
|
|
Dec 15, 2019 19:22:41 GMT
|
Half way there, 3192 straws down, around the same to go. I REALLY should have used bigger straws :-)
|
|
Last Edit: Dec 15, 2019 19:29:23 GMT by nalesutol
|
|
tristanh
Part of things
Routinely bewildered
Posts: 990
|
|
Dec 15, 2019 21:35:37 GMT
|
What are the straws for? To straighten out the airflow?
|
|
Whether you believe you can, or you cannot, you're probably right.
|
|
|
|
Dec 15, 2019 22:22:09 GMT
|
What are the straws for? To straighten out the airflow? Yes.
|
|
|
|
thomge
Part of things
Posts: 60
|
|
Dec 15, 2019 22:40:21 GMT
|
Just a thought, but a bit too late now! Would sheets of corriflute/correx laminated together have possibly worked as a quicker alternative to straws?
|
|
|
|
|
|
|
Just a thought, but a bit too late now! Would sheets of corriflute/correx laminated together have possibly worked as a quicker alternative to straws? Any tube will do, but I didn't have any correx and straws seems to be the common method, I just used straws that were rather small making a lot more work for myself. Why didn't you suggest this before I started? :-)
|
|
Last Edit: Dec 16, 2019 11:12:34 GMT by nalesutol
|
|
|
|
Dec 17, 2019 13:19:39 GMT
|
I've just made some popcorn. This is going to be interesting With you. Fridge full of beer and a curry on the go.
|
|
|
|
elfman
Part of things
Posts: 398
|
|
Dec 17, 2019 14:25:09 GMT
|
Sorry I forgot to say I put my 180 R-Tech welder on a trolley from Machine Mart.. Its a tight fit with a full size gas bottle due to where the pipe goes into the unit, but if you using a smaller bottle it should be prefect..
|
|
|
|
|
|
Dec 17, 2019 16:27:39 GMT
|
|
|
Last Edit: Dec 17, 2019 22:15:20 GMT by nalesutol
|
|